The Contractor shall provide additional notification for night work that creates excessive noise, as described in Subsection 7-8.3 (“Noise Control.”) of these Specifications.
Full compensation for the Public Notification shall include all necessary labor, equipment, materials, and all other related costs for preparation, copying, and distribution shall be considered as included in the lump sum price Bid for Public Notification.
7-15 RESPONSIBILITY FOR DAMAGE.
In addition to the provisions of Subsection 7-3 (“Liability Insurance.”) of the Standard Specifications as between the Agency and the Contractor, the Contractor shall take and assume all responsibility for the Work as stated herein and/or shown on the Plans.
91 The Contractor shall bear all losses and damages directly or indirectly resulting to him, to the Agency, the Engineer, their officers, employees, and agents, or to others on account of the performance or character of the work, unforeseen difficulties, accidents or any other causes whatsoever.
The Contractor shall assume the defense of and indemnify and save harmless the Agency, the Engineer, their officers, employees, and agents respectively from all claims, loss, damage, injury and liability of every kind, nature, and description, directly or indirectly arising from the performance of the Contract or work, regardless of responsibility for negligence; and from any and all claims, loss, damage, injury, and liability, howsoever the same may be caused, resulting directly or indirectly from the nature of the work covered by the Contract, regardless of responsibility for negligence.
The Agency does not, and shall not; waive any rights against the Contractor which it may have be reason of the aforesaid hold harmless agreements, because of the acceptance by the Agency or deposit with the Agency by Contractor, of any insurance policies required herein or as described in Subsection 7-3. The aforesaid hold harmless agreement by Contractor shall apply to all damages and claims for damages of every kind suffered, or alleged to have been suffered by reason of any of the aforesaid operations of Contractor, or any Subcontractor, regardless of whether or not such insurance policies are determined to be applicable to any of such damages or claims for damages.
No act by the Agency, Engineer or their representatives in processing or accepting any plans, in releasing any bond, in inspecting or accepting any work, or of any other nature, shall in any respect relieve the Contractor or anyone else, from any legal responsibility, obligation or liability he might otherwise have.
7-16 INDEMNIFICATION.
Contractor shall defend (with counsel of Agency’s choosing), indemnify and hold the Agency, its officials, officers, agents, employees, and representatives free and harmless from any and all claims, demands, causes of action, costs, expenses, liabilities, losses, damages or injuries, in law or equity, regardless of whether the allegations are false, fraudulent, or groundless, to property or persons, including wrongful death, to the extent arising out of or incident to any acts, omissions or willful misconduct of Contractor, its officials, officers, employees, agents, consultants and contractors arising out of or in connection with the performance of the Work or this Contract, including claims made by Subcontractors for nonpayment, including without limitation the payment of all consequential damages and other related costs and expenses. Contractor shall defend, at Contractor’s own cost, expense and risk, with counsel of Agency’s choosing, any and all such aforesaid suits, actions or other legal proceedings of every kind that may be brought or instituted against Agency, its officials, officers, agents, employees and representatives. To the extent of its liability, Contractor shall pay and satisfy any judgment, award or decree that may be rendered against Agency, its officials, officers, employees, agents, employees and representatives, in any such suit, action or other legal proceeding. Contractor shall reimburse Agency, its officials, officers, agents, employees and representatives for any and all costs incurred by each of them in connection therewith or in enforcing the indemnity herein provided.
The only limitations on this provision shall be those imposed by Civil Code Section 2782.
7-17 EMERGENCY PHONE NUMBERS.
92 The Contractor shall provide the Engineer an emergency contact name and telephone number prior to the start of the Work that may be used to contact the Contractor in the event of an emergency for the duration of the Contract. Contractor shall also keep a list of emergency telephone numbers on the job site. In the case that more than ten (10) employees are on the job site at any time, said list shall be posted on a bulletin board, to be supplied and installed on the job site by the Contractor in a location visible and accessible to all employees.
The following emergency telephone numbers are listed for the convenience of the Contractor to assist in complying with these requirements:
AGENCY PHONE NUMBER
City of Vista Fire Department (Rancho Dispatch) 858-756-3006 City of Vista Fire Department (Emergency) 911 or 858-756-1126 San Diego County Sheriff’s Office (Emergency) 911
Tri-City Medical Center, 4002 Vista Way, Oceanside, CA 92056 911 or 800-579-8262 San Diego Gas and Electric 800-611-7343
7-18 DOCUMENT RETENTION & EXAMINATION.
In accordance with Government Code Section 8546.7, records of both the Agency and the Contractor shall be subject to examination and audit by the State Auditor General for a period of three (3) years after final payment. Contractor shall make available to the Agency any of the Contractor’s other documents related to the Project immediately upon request of the Agency.
In addition to the State Auditor rights above, the Agency shall have the right to examine and audit all books, estimates, records, contracts, documents, bid documents, subcontracts, and other data of the Contractor (including computations and projections) related to negotiating, pricing, or performing the modification in order to evaluate the accuracy and completeness of the cost or pricing data at no additional cost to the Agency, for a period of four (4) years after final payment. 7-19 STATE LICENSE BOARD NOTICE.
Contractors are required by law to be licensed and regulated by the Contractors’ State License Board which has jurisdiction to investigate complaints against contractors if a complaint regarding a patent act or omission is filed within four (4) years of the date of the alleged violation. A complaint regarding a latent act or omission pertaining to structural defects must be filed within ten (10) years of the date of the alleged violation. Any questions concerning a contractor may be referred to the Registrar, Contractors’ State License Board, P.O. Box 26000, Sacramento, California 95826.
SECTION 9 – MEASUREMENT AND PAYMENT
9-3 PAYMENT.
9-3.1 General.
93 Except as may otherwise be provided in specific instances, nothing in the Contract shall be construed as vesting in the Contractor any property, any material, article or structure existing at the time of the award of Contract within the area in which the Work is to be done or in any material, article or structure subsequently furnished for the Work by the Agency, or in any material, article, structure or Work furnished or performed by the Contractor after having been accounted for on an approved estimate supporting the Contractor's demand for payment as provided in Subsection 9-3 (“Payment.”) of the Greenbook. In the latter event any such material, article, structure or Work shall become the property of the Agency after being so accounted for.
9-3.2 PARTIAL AND FINAL PAYMENT.
Pursuant to Section 22300 of the California Public Contract Code, the Contractor may substitute securities for any money held by the Agency to ensure performance of the Contract. At the request and expense of the Contractor, securities equivalent to the amount withheld shall be deposited with the Agency, or with a state or federally chartered bank as an escrow agent, who shall return such securities to the Contractor upon satisfactory completion of the Contract. Deposit of securities with an escrow agent shall be subject to written Contract in accordance with the provisions of Section 22300 of the California Public Contract Code. For purposes of the escrow agreement, the Agency shall not certify that the Contract has been completed until at least forty five (45) calendar days after filing by the Agency of a Notice of Completion. Securities eligible for investment under this Section shall be limited to those listed in Section 16430 of the California Government Code, bank or savings and loan certificates of deposit, interest bearing demand deposit accounts, standby letters of credit, or any other security mutually agreed upon by the Contractor and the Agency.
Requests for partial payments shall be submitted in a form satisfactory to the Agency. At a minimum, the form shall include all bid items, itemized breakdowns of lump sum bid items from the schedule of values (provided by Contractor), unit or lump sum prices bid, the quantities of each bid item for the current and past invoices, the dollar amount of each bid item, a total amount, and the name, address and phone number of the Contractor.
The Contractor shall meet with the Engineer to field measure quantities, and if an agreement is NOT reached, the disputed quantities shall be documented at that time. The Contractor shall not include in his invoice any quantities that have not been approved by the Engineer. The Engineer will not be required to pay for any disputed quantities of work until an agreement is reached with respect to the actual quantity in place. The Engineer may make payments for disputed quantities of work based on his own estimate, until such time that an agreement is reached.
The Agency will make partial payments in accordance with Section 20104.50 of the Public Contract Code, and these specifications. The Agency will pay progress payments within thirty (30) calendar days of receipt of an undisputed, complete and properly prepared payment request from the Contractor, or pay interest to the Contractor equivalent to the legal rate set forth in subdivision (a) of Section 685.010 of the Code of Civil Procedure.
Any payment request determined not to be a proper payment request suitable for payment shall be returned to the Contractor as soon as practicable, but not later than seven (7) calendar days, after receipt.
As part of the monthly request for partial payment, the Contractor shall submit:
94 1] A list of all subcontractors who worked on the project, along with their PWC Registration Number, so the Agency can ensure that all contractors and subcontractors are registered as required by Labor Code Section 1771.1;
2] Conditional and unconditional lien releases for the Contractor and all subcontractors; 3] An updated construction schedule (showing actual progress of the Work); 4] The Record Drawings (updated to indicate all changes made up to the end of the billing period). 5] Certified payroll records to the Labor Commissioner’s Office;
Monthly progress payments are conditioned upon the Agency having received from the Contractor the monthly schedule update and other specified documents.
Contractor shall provide to City, as a condition precedent to the payment of Contractor’s final retention, a complete list of all subcontractors who have worked on the Project, including their PWC Registration Numbers. This list must be provided at least 30 days prior to the payment of the final retention and shall be submitted under penalty of perjury.
The Agency is required by State Law to withhold final payment to the Contractor until at least 30 days after PWC-100 information has been submitted to the DIR, including the list of subcontractors who worked on the Project.
A prime contractor or subcontractor shall pay any subcontractor not later than ten (10) Working Days of receipt of each progress payment for satisfactory performance in accordance with the provision in Section 7108.5 of the California Business Code concerning prompt payment to subcontractors. The ten (10) Working Days is applicable unless a longer period is agreed to in writing.
Any delay or postponement of payment over thirty (30) calendar days may take place only for good cause and with the Agency’s prior written approval. Any violation of Section 7108.5 shall subject the violating contractor or subcontractor to the penalties, sanction, and other remedies of that section.
The Agency will hold retainage from the prime contractor and will make prompt and regular incremental acceptances of portions, as determined by the Agency of the Contract work, and pay retainage to the prime contractor based on these acceptances. The prime contractor, or subcontractor, shall return all monies withheld in retention from a subcontractor within seven (7) calendar days after receiving payment for work satisfactorily completed and accepted including incremental acceptances of portions of the Contract work by the Agency.
9-3.3 Delivered Materials.
Progress payments may include payment for specialty materials that will remain permanent features of the Work, not incorporated in the Work, but delivered and suitably stored at the site or at another location, insured and bonded by the Contractor and agreed to, in writing, by the Engineer.
Payment for stored materials will be based on a cost breakdown, acceptable to the Engineer, indicating the value and installation costs of such materials, provided each individual item has a value of more than five-thousand dollars ($5,000). The Agency will pay a maximum of seventy-five percent (75%) of the value of the material, until such time as the material is permanently installed in the Work. The Contractor shall submit a bill of sale, invoice, or other documentation warranting that the Contractor has received the materials free and clear of liens, charges, security interests, and encumbrances, and evidence that the materials and equipment are covered by appropriate property insurance.
95 9-3.4 Mobilization.
Mobilization and Demobilization shall consist of preparatory work and operations, including, but is not limited to those necessary for the move-on and move-off operations such as:
1] Supplying, maintaining, and finally removing temporary facilities; including portable field office, sanitary facilities, electric power, water, telephone and other utilities, enclosures for storage of construction equipment, products / materials and incidentals;
2] Furnishing all insurance, bonds, licenses, materials, tools, equipment and incidentals involved in mobilization and preparatory work and operations, including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidental to the project; for all other facilities, sureties, work and operations which must be performed or costs incurred prior to beginning work or various contractor items on or off the project site;
3] Making arrangements for construction personnel vehicle parking;
4] Application and acquiring permits from other agencies as required for the Project;
5] For other items not directly related to the bid items.
Payment for Mobilization and Demobilization shall be paid by the lump sum price bid as shown on the BID SCHEDULE. If the Mobilization and Demobilization bid item states a maximum percentage of total base bid on the BID SCHEDULE, the Agency reserves the right to conform the bid item price to the maximum stated percentage. When the Agency has to conform the bid item price to the maximum stated percentage, such action does not constitute a reason for the Contractor to withdraw their bid.
If no separate item is shown in the bid for mobilization and demobilization, then the Contractor shall include all costs in the various items of work.
Placement of facilities and storage of construction equipment and materials shall be approved in advance by the Engineer. All such facilities and equipment shall remain the property of the Contractor.
The Contractor shall be held responsible for all damage caused during mobilization and demobilization. The Contractor shall leave all storage areas in a neat clean condition, satisfactory to the Engineer and in accordance with the provisions of storage permits set by the property owner.
When a separate bid item is included in the BID SCHEDULE, payments for mobilization and demobilization will be made in accordance to the following schedule:
a] When the approved monthly partial payment estimate of the amount earned, not including the amount earned for mobilization and demobilization, is ten percent (10%) or more of the original Contract amount, twenty-five percent (25%) of the Contract item price for mobilization and demobilization will be included in the estimate for payment.
b] When the approved monthly partial payment estimate of the amount earned, not including the amount earned for mobilization and demobilization, is twenty- five percent (25%) or more of the original Contract amount, the total amount earned for mobilization and demobilization shall be fifty percent (50%) of the Contract item price for mobilization and demobilization will be included in the estimate for payment.
96 c] When the approved monthly partial payment estimate of the amount earned, not including the amount earned for mobilization and demobilization, is fifty percent (50%) or more of the original Contract amount, the total amount earned for mobilization and demobilization shall be seventy-five percent (75%) of the Contract item price for mobilization and demobilization will be included in the estimate for payment.
d] When the approved monthly partial payment estimate of the amount earned, not including the amount earned for mobilization and demobilization, is seventy-five percent (75%) or more of the original Contract amount, the total amount earned for mobilization and demobilization shall be ninety-five percent (95%) of the Contract item price for mobilization and demobilization will be included in the estimate for payment.
e] After final acceptance of the Project, the remaining unpaid amount, of the Contract item price for mobilization will be included for payment in the final progress payment.
9-4 BID ITEMS.
Payment for the work included in each Bid Item shall be made at the actual quantity constructed, using the units listed in the BID SCHEDULE and the Unit Prices included in the BID. All other work shown or mentioned on the Plans, in the Specifications, or in any one of the Contract Documents shall be considered as included in the related Bid Items shown in the BID SCHEDULE. The Contractor must complete all work that is shown or described in the Contract Documents, whether or not there is a specific Bid Item for that work, and no additional compensation will be allowed.
**END OF SECTION***
97 98
Appendix A:
Design Standards and Specifications
075500
Curbside Café Roof Replacement
PART 1 GENERAL
1.1 SCOPE OF WORK
A.Provide all labor, equipment, and miscellaneous materials to install City of Vista purchased and furnished roofing materials over the properly prepared substrate
1. All products listed in 2.1, D will be furnished by the City of Vista. All products not listed in 2.1, D are to be furnished by the Contractor. All products listed in 2.1, D will be manufactured by The Garland Company and purchased by City of Vista using its authority under the CMAS Schedule.
Contract #: 4-20-56-0006B.
B.Base Bid: Curbside Cafe
•Address: 307 Main St, Vista, CA 92084
1. Remove the existing roof system to the structural deck.
2. Remove any non-functioning equipment identified by the City of Vista.
Repair any damaged decking as required. Contractor to include 7% deck replacement in the base bid. If the amount of deck replacement exceeds 7%, the contractor is to receive a change order equal to the unit price for deck replacement per sq ft multiplied by the sq ft in excess of the base bid amount.
If the amount of deck replacement is less than 7%, the contractor is to provide
a credit to the City of Vista equal to the unit price of deck replacement per sq ft multiplied by the sq ft less than the base bid amount.
3. Mechanically fasten R10 polyiso insulation to the structural deck. Install per wind uplift requirements.
4. Install crickets on the high side of all equipment.
5. Install ¼” Densdeckprime coverboard over all insulation. Tape all joints.
6. Torch apply SBS modified base sheet – HPR Torch Base Sheet.
7. Torch apply Stressply Plus IV Mineral cap sheet.
8. Flashings:
a. Apply SBS-modified flashing ply in all flashing areas – HPR Torch Base Sheet. Flashing ply to extend min 6” onto the roof field. Apply SBS- modified flashing cap ply – Stressply Plus IV UV Mineral -- in all flashing areas extending a min 9” onto the roof field.
b. Lower Canopy Internal Wall: Flashing plies to be set as high as possible. 22 gauge, galvanized skirt metal to be set to the existing counterflashing metal.
c. Parapet Walls Less than 4’: Wrap the wall with flashing plies extending 2” on the exterior side. Install wood nailer as required. Install 22 gauge, kynar coping cap, except at locations with existing clay tile surfacing.
City of Vista to approve color.
d. Scuppers: All scupper overflows to be removed and re-installed per manufacturer requirements. Note: Size to match CBC requirements.
9. Surfacing:
a. Contractor to wait 15 days to allow new roof system to cure out b. Instill Title 24 compliant Pyramic at 2 gal per sq. Install in two passes of 1 gal per sq per coat. Apply cross directionally.
c. Minor Ponding Areas: Apply 3 gal per sq of Title 24 compliant silicone coating – Cool Sil – embedded with 30 lbs per sq of Title 24 minerals.
Coating to extend 2’ outside the waterways.
10. Sheet Metal:
a. Coping Cap: Where existing, install 22 gauge, kynar coping cap at a top of parapet walls. City of Vista to approve color.
b. Metal Drip Edge: Where existing, install 22 gauge, kynar metal drip edge at edge of roof. City of Vista to approve color.
c. Gutter: Where existing, install new 22 gauge, kynar, 5”x 5”x 5” box gutter. Install 22 gauge, kynar box 3”x3”x3” downspout. City of Vista to approve color.
d. All double cant details to receive a single plywood cant. e. All sheet metal to comply with ANSI SPRI ES-1.
11. No pitch pockets on roof. Lead flash all penetrations. Roofing contractor to
supply and install all lead flashings. Install umbrella cover over all sealed clamps. Multiple lines from a single penetration point to receive a pelican hood cover.
12. All conduit on existing redwood blocks to be placed on rubber blocking – Durablock.
13. Install new vent covers.
14. Metal Pans / Vents / Equipment: Seal with Cool Sil at a rate of 2 gal per sq.
Tape all seams with structural tape. Tape all exposed bolts and fasteners.
15. Ductwork: Seal with Cool Sil at a rate of 2 gal per sq. Tape all seams with structural tape.
16. No walkpads on the roof system.
17. Caulk all skylights to ensure watertight condition.
18. Metal Flashings around HVAC Units to be lifted to allow for proper flashing height. Metal to then be re-installed.
19. Wall electrical sockets to be sealed.
1.2 REFERENCES
A. ASTM D 41 - Standard Specification for Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing.
B. ASTM D 312 - Standard Specification for Asphalt used in Roofing.
C. ASTM D 451 - Standard Test Method for Sieve Analysis of Granular Mineral Surfacing for Asphalt Roofing Products.
D. ASTM D 1079 Standard Terminology Relating to Roofing, Waterproofing and Bituminous Materials.
E. ASTM D 1863 Standard Specification for Mineral Aggregate Used as a Protective Coating for Roofing.
F. ASTM D 4586 Standard Specification for Asphalt Roof Cement, Asbestos-Free.
G. ASTM D 4601 Standard Specification for Asphalt Coated Glass Fiber Base Sheet Used in Roofing.
H. ASTM D 5147 Standard Test Method for Sampling and Testing Modified Bituminous Sheet Materials.
I. ASTM D 6162 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements.
J. National Roofing Contractors Association (NRCA): Roofing and Waterproofing
Manual.
K. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) - Architectural Sheet Metal Manual.
L. ANSI-SPRI ES-1 Wind Design Standard for Edge Systems used with Low Slope Roofing Systems.
M. ASCE 7, Minimum Design Loads for Buildings and Other Structures N. FM Approvals - Roof Coverings and/or RoofNav assembly database.
O. California Title 24 Energy Efficient Standards.
1.3 SUBMITTALS
A. Product Data: Manufacturer's data sheets on each product to be used, including:
1. Preparation instructions and recommendations.
2. Storage and handling requirements and recommendations.
3. Installation instructions.
B. Shop Drawings: Submit shop drawings including installation details of roofing, flashing, fastening, insulation and vapor barrier, including notation of roof slopes and fastening patterns of insulation and base modified bitumen membrane, prior to job start.
C. Manufacturer's Certificates: Provide to certify products meet or exceed specified requirements.
1.4 QUALITY ASSURANCE
A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual.
B. Installer Qualifications: Company specializing in performing Work of this section with minimum five years documented experience and a certified Pre-Approved Garland Contractor.
C. Installer's Field Supervision: Maintain a full-time Supervisor/Foreman on job site during all phases of roofing work while roofing work is in progress.
Supervisor/Foreman to provide the City of Vista with a cellphone number.
1.5 PRE-INSTALLATION MEETINGS
A. Convene minimum two weeks prior to commencing Work of this section.
B. Review installation procedures and coordination required with related Work.
C. Inspect and make notes of job conditions prior to installation:
1. Record minutes of the conference and provide copies to all parties present.
2. Identify all outstanding issues in writing designating the responsible party for follow-up action and the timetable for completion.
3. Installation of roofing system shall not begin until all outstanding issues are resolved to the satisfaction of the City of Vista.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Deliver and store products in manufacturer's unopened packaging with labels intact until ready for installation.
B. Store all roofing materials in a dry place, on pallets or raised platforms, out of direct exposure to the elements until time of application. Store materials at least 4 inches above ground level and covered with "breathable" tarpaulins.
C. Stored in accordance with the instructions of the manufacturer prior to their application or installation. Store roll goods on end on a clean flat surface. No wet or damaged materials will be used in the application.
D. Store at room temperature wherever possible, until immediately prior to installing the roll. During winter, store materials in a heated location with a 50 degree F (10 degree C) minimum temperature, removed only as needed for immediate use. Keep materials away from open flame or welding sparks.
E. Avoid stockpiling of materials on roofs without first obtaining acceptance from the Architect/Engineer.
F. Adhesive storage shall be between the range of above 50 degree F (10 degree C) and below 80 degree F (27 degree C). Area of storage shall be constructed for flammable storage.
G. The contractor is to receive and to store all materials upon issuance of contract.
Contractor assumes all responsibility for material upon delivery. All material will be shipped in one shipment prior to the start of the project. The contractor is to unload and store the material.
1.7 PROJECT CONDITIONS
A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
1.8 WARRANTY
A. Upon completion of the work, manufacturer to provide a written and signed NDL Warranty, warranting that, if a leak develops in the roof during the term of this warranty, due either to defective material or defective workmanship by the installing contractor, the manufacturer shall provide the Owner, at the Manufacturer's expense, with the labor and material necessary to return the defective area to a watertight condition.
1. Warranty Period: 30 year NDL warranty
B. Contractor Warranty:
1. Warranty Period: 5 year
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. The design is based upon roofing systems engineered and manufactured by The Garland Company:
The Garland Company, Miles Taylor 310.367.7655
B. Roofing Contractor to be responsible for all Garland materials in excess of City of Vista purchased and furnished amount. City of Vista to provide material quantities matching the specified amount below. Any additional Garland material required to complete the project is the responsibility of the roofing contractor. Roofing Contractor responsible for purchasing additional materials required, including all freight and tax charges.
C. Roofing contractor to be at delivery of City of Vista purchased roof materials. The City of Vista has no responsibility to provide any equipment for handling and / or loading the materials to the Contractor’s trucks. Upon signature of delivery, the roofing contractor assumes full responsibility for all City of Vista purchased roof materials. Any materials lost or stolen are the responsibility of the roofing contractor to replace. Roofing Contractor responsible for freight and tax on the replaced materials.
D. Maximum quantity of the OFCI materials to be provided for all roofing which will be provided to the Contractor is as follows:
Curbside Café
Material Amount Unit Size
HPR Torch Base Sheet 31 Rolls
Stressply Plus IV UV Mineral 40 Rolls
Pyramic 12 5 Gal
Cool Sil 1 5 Gal
Flashing Bond 2 5 Gal
Tuff Stuff Caulking 15 Tube
2.2 ACCESSORlES:
A. Nails and Fasteners: Non-ferrous metal or galvanized steel, except that hard copper nails shall be used with copper; aluminum or stainless steel nails shall be used with
aluminum; and stainless steel nails shall be used with stainless steel, Fasteners shall be self-clinching type of penetrating type as recommended by the deck manufacturer.
Fasten nails and fasteners flush-driven through flat metal discs not less than 1 inch (25 mm) diameter. Omit metal discs when one-piece composite nails or fasteners with heads not less than 1 inch (25 mm) diameter are used.
B. Sealant: Tuff Stuff Natural White – Supplied by City of Vista C. Butyl Tape -- 100% solids, asbestos free and compressive tape designed to seal as recommended.
D. Glass Fiber Cant – GAF EnergyGuard Perlite Cant Strip and/or equivalent:
Continuous triangular cross fibrous glass used as a cant strip.
E. Rubber Blocks – Durablock and/or equivalent
F. Mesh –SBS coated woven fiberglass reinforcing fabric.
G. Mastic – Flashing Bond
PART 3 EXECUTION
3.1 EXAMINATION
A. Do not begin installation until substrates have been properly prepared.
B. Inspect and approve the deck condition, slopes and fastener backing if applicable, parapet walls, expansion joints, roof drains, stack vents, vent outlets, nailers and surfaces and elements.
C. Verify that work penetrating the roof deck, or which may otherwise affect the roofing, has been properly completed.
D. If substrate preparation and other conditions are the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2 PREPARATION
A. General: Clean surfaces thoroughly prior to installation.
1. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
2. Fill substrate surface voids that are greater than 1/4 inch wide with an acceptable fill material.
3. Roof surface to receive roofing system shall be smooth, clean, free from loose gravel, dirt and debris, dry and structurally sound.
4. Wherever necessary, all surfaces to receive roofing materials shall be power broom and vacuumed to remove debris and loose matter prior to starting work.
5. Do not apply roofing during inclement weather. Do not apply roofing membrane to damp, frozen, dirty, or dusty surfaces.
6. Fasteners and plates for fastening components mechanically to the substrate
shall provide a minimum pull-out capacity of 300 lbs. (136 k) per fastener.
Base or ply sheets attached with cap nails require a minimum pullout capacity of 40 lb. per nail.
7. Prime decks where required, in accordance with requirements and recommendations of the primer and deck manufacturer.
B. Wood Deck:
1. Plywood shall be a minimum 15/32 inch (11.9 mm) thick and conform to the standards and installation requirements of the American Plywood Association (APA).
2. Provide a suitable dry sheathing paper, followed by an approved base sheet nailed appropriately for the specified roof system, with 1 inch (25 mm) diameter caps and annular nails unless otherwise required by the applicable Code or Approval agency.
3. Light metal wall ties or other structural metal exposed on top of the wood deck shall be covered with one ply of a heavy roofing sheet, such as HPR Glasbase Base Sheet and/or equivalent, extending 2 inches to 6 inches (51 mm to 152 mm) beyond the metal in all directions. Nail in place before applying the base ply.
C. Re-Roofing Applications:
1. Remove existing roof flashings from curbs and parapet walls down to the surface of the roof. Remove existing flashings at roof drains and roof penetrations.
2. Remove all wet, deteriorated, blistered or delaminated roofing membrane or insulation and fill in any low spots occurring as a result of removal work to create a smooth, even surface for application of new roof membranes.
3. Install new wood nailers as necessary to accommodate insulation/recovery board or new nailing patterns.
4. When mechanically attached, the fastening pattern for the insulation/recovery board shall be as recommended by the specific product manufacturer.
5. Re-roofing over coal tar pitch requires a mechanically attached recovery board or insulation and a base sheet prior to the application of roofing system.
6. Existing roof surfaces shall be primed as necessary with asphalt primer meeting ASTM D 41 and allowed to dry prior to installing the roofing system.
3.3 INSTALLATION - GENERAL
A. Install modified bitumen membranes and flashings in accordance with manufacturer's instructions and with the recommendations provided by the National Roofing Contractors Association's Roofing & Waterproofing Manual, the Asphalt Roofing Manufacturers Association, and applicable codes.
B. Avoid installation of modified bitumen membranes at temperatures lower than 40-45 degrees F. When work at such temperatures unavoidable use the following precautions:
1. Take extra care during cold weather installation and when ambient temperatures are affected by wind or humidity, to ensure adequate bonding is
achieved between the surfaces to be joined. Use extra care at material seam welds and where adhesion of the applied product to the appropriately prepared substrate as the substrate can be affected by such temperature constraints as well.
2. Unrolling of cold materials, under low ambient conditions must be avoided to prevent the likelihood of unnecessary stress cracking. Rolls must be at least 40 degrees F at the time of application. If the membrane roll becomes stiff or difficult to install, it must be replaced with roll from a heated storage area.
C. Commence installation of the roofing system at the lowest point of the roof (or roof area), working up the slope toward the highest point. Lap sheets shingle fashion so as to constantly shed water
D. All slopes greater than 2:12 require back-nailing to prevent slippage of the ply sheets. Use ring or spiral-shank 1 inch cap nails, or screws and plates at a rate of 1 fastener per ply (including the membrane) at each insulation stop. Place insulation stops at 16 ft o.c. for slopes less than 3:12 and 4 feet o.c. for slopes greater than 3:12.
On non-insulated systems, nail each ply directly into the deck at the rate specified above. When slope exceeds 2:12, install all plies parallel to the slope (strapping) to facilitate backnailing. Install 4 additional fasteners at the upper edge of the membrane when strapping the plies.
E. At the end of each day, the contractor must ensure the site is water tight. The contractor is responsible during the contractor to maintain the waterproofing of the site.
3.4 INSTALLATION TORCH APPLIED 2-PLY ASPHALT ROOFING
A. Base Ply: Install torch base sheet to a properly prepared substrate. Shingle in proper direction to shed water on each area of roofing.
1. Lay out the roll in the course to be followed and unroll 6 feet (1.8 m).
2. Using a roofing torch, heat the surface of the coiled portion until the burn-off backer melts away. At this point, the material is hot enough to lay into the substrate. Progressively unroll the sheet while heating and press down with your foot to insure a proper bond.
3. After the major portion of the roll is bonded, re-roll the first 6 feet (1.8 m) and bond it in a similar fashion.
4. Repeat this operation with subsequent rolls with side laps of 4 inches (101 mm) and end laps of 8 inches (203 mm).
5. Give each lap a finishing touch by passing the torch along the joint and spreading the melted bitumen evenly with a rounded trowel to insure a smooth, tight seal.
6. Extend underlayment 2 inches (50 mm) beyond top edges of cants at wall and projection bases.
7. Install base flashing ply to all perimeter and projections details.
B. Modified Cap (Ply) Sheet: Over torch base sheet underlayment, lay out the roll in the course to be followed and unroll 6 feet (1.8 m). Stagger seams over the torch base
sheet seams.
1. Using a roofing torch, heat the surface of the coiled portion until the burn-off backer melts away. At this point, the material is hot enough to lay into the substrate. Progressively unroll the sheet while heating and press down with your foot to insure a proper bond.
2. After the major portion of the roll is bonded, re-roll the first 6 feet (1.8 m) and bond it in a similar fashion.
3. Repeat this operation with subsequent rolls with side laps of 4 inches (101 mm) and end laps of 8 inches (203 mm).
4. Give each lap a finishing touch by passing the torch along the joint and spreading the melted bitumen evenly with a rounded trowel to insure a smooth, tight seal.
C. Fibrous Cant Strips: Provide non-combustible perlite or glass fiber cant strips at all wall/curb detail treatments where angle changes are greater than 45 degrees. Cant may be set in approved cold adhesives, hot asphalt or mechanically attached with approved plates and fasteners.
D. Wood Blocking, Nailers and Cant Strips: Provide wood blocking, nailers and cant strips as specified in Section 06114.
1. Provide nailers at all roof perimeters and penetrations for fastening membrane flashings and sheet metal components.
2. Wood nailers should match the height of any insulation, providing a smooth and even transition between flashing and insulation areas.
3. Nailer lengths should be spaced with a minimum 1/8 inch gap for expansion and contraction between each length or change of direction.
4. Nailers and flashings should be fastened in accordance with Factory Mutual "Loss Prevention Data Sheet 1- 49, Perimeter Flashing" and be designed to be capable of resisting a minimum force of 200 lbs/lineal foot in any direction.
E. Metal Work: Provide metal flashings, counter flashings, parapet coping caps and thru-wall flashings as specified in Section 07620 or Section 07710. Install in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing Waterproofing manual.
F. Termination Bar: Provide a metal termination bar or approved top edge securement at the terminus of all flashing sheets at walls and curbs. Fasten the bar a minimum of 8 inches (203 mm) o/c to achieve constant compression. Provide suitable, sealant at the top edge if required.
G. Flashing Base Ply: Seal all curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.
1. Prepare all walls, penetrations, expansion joints, and other surfaces to be flashed with asphalt primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.
2. Adhere modified flashing base to the underlying base flashing ply with specified flashing ply adhesive. Nail off at a minimum of 8 inches (203 mm)
o.c. from the finished roof at all vertical surfaces.
3. Solidly adhere the entire sheet of flashing membrane to the substrate. Tops of all flashings that are not run up and over curb shall be secured through termination bar 6 inches (152 mm) and sealed at top
4. Seal all vertical laps of flashing membrane with a three-course application of trowel-grade mastic and fiberglass mesh.
5. Coordinate counter flashing, cap flashings, expansion joints, and similar work with modified bitumen roofing work.
6. Coordinate roof accessories, miscellaneous sheet metal accessory items, including piping vents and other devices with the roofing system work. When using mineralized cap sheet all stripping plies type IV felt / Versiply 40 shall be installed prior to cap sheet installation.
3.5 INSTALLATION EDGE TREATMENT AND ROOF PENETRATION FLASHING A. Manufactured Roof Specialties: Manufactured copings, facia, gravel stops, control joints, expansion joints, joint covers and related flashings and trim are provided as specified in Section
1. Manufactured roof specialties shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the National Roofing Contractor's Association "Roofing and Waterproofing Manual" as applicable.
B. Metal Edge:
1. Inspect the nailers to assure proper attachment and configuration.
2. Run the base sheet over the edge. Assure coverage of all wood nailers. Fasten plies with ring shank nails at 8 inches (203 mm) o.c.
3. Install continuous cleat and fasten at 6 inches (152 mm) o.c.
4. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailers every 3 inches (76 mm) o.c. staggered.
5. Prime metal edge at a rate of 100 square feet per gallon and allow to dry.
6. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches (152 mm) on to the field of roof. Assure ply laps do not coincide with metal laps.
7. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Seal outside edge with rubberized cement.
C. Reglet Mounted Counterflashing / Skirt Metal Flashing.
1. Minimum flashing height is 8 inches (203 mm) above finished roof height.
Maximum flashing height is 24 inches. Prime vertical wall at a rate of 100 square feet per gallon and allow to dry.
2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to field of the roof.
4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and
aluminize.
5. Apply butyl tape to wall behind flashing. Secure termination bar through flashing, butyl tape – Butyl Sealing Tape and/or equivalent -- and into wall.
Alternatively use sealant to replace the butyl tape.
6. At existing reglet counterflashing, mechanically fasten new 22 gauge, galvanized skirt metal to the existing counterflashing metal.
7. Where new reglet metal ins required, cut reglet in masonry one joint above flashing. Secure reglet counterflashing with expansion fasteners and seal reglet opening.
D. Curb Detail/Air Handling Station:
1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime – Garla Prime VOC and/or equivalent -- vertical at a rate of 100 square feet per gallon and allow to dry.
2. Set cant in bitumen. Run all field plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering curb set in bitumen with 6 inches (152 mm) on to field of the roof.
4. Install a second ply of modified flashing ply in bitumen over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.
5. Install pre-manufactured counterflashing with fasteners and neoprene washers or per manufacturer's recommendations.
6. Set equipment on neoprene pad and fasten as required by equipment manufacturer.
E. Passive Vent/Air Intake:
1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime – Garla Prime VOC and/or equivalent -- vertical at a rate of 100 square feet per gallon and allow to dry.
2. Set cant in bitumen. Run all plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering curb with 6 inches (152mm) on to the field of the roof.
4. Install a second ply of modified flashing ply installed over the base flashing ply, 9 inches (228 mm) on to field of the roof. Attach top of membrane to top of wood curb and nail at 8 inches (203 mm) o.c. Apply a three-course application of mastic and mesh at all vertical seams and allow to cure and aluminize.
5. Install passive vent/air intake over the wood nailers and flashing to act as counterflashing. Fasten per manufacturer's recommendations.
F. Plumbing Stack: Lead Flashing
1. Minimum stack height is 12 inches (609 mm).
2. Run roof system over the entire surface of the roof. Seal the base of the stack with elastomeric sealant – Tuff Stuff Natural White and/or equivalent..
3. Prime – Garla Prime VOC and/or equivalent -- flange of new sleeve. Install
properly sized sleeves set in 1/4 inch (6 mm) bed of roof cement.
4. Install base flashing ply in bitumen.
5. Install membrane in bitumen.
6. Seal the intersection of the membrane with sealant – Tuff Stuff Natural White and/or equivalent.
7. Turn sleeve a minimum of 1 inch (25 mm) down inside of stack.
G. Heat Stack:
1. Minimum stack height is 12 inches (609 mm).
2. Run roof system over the entire surface of the roof. Seal the base of the stack with elastomeric sealant – Tuff Stuff Natural White and/or equivalent.
3. Prime – Garla Prime VOC and/or equivalent -- flange of new sleeve. Install properly sized sleeves set in 1/4 inch (6 mm) bed of roof cement.
4. Install base flashing ply in bitumen.
5. Install modified membrane in bitumen.
6. Seal the intersection of the membrane with sealant – Tuff Stuff Natural White and/or equivalent.
7. Install new collar over cape. Weld collar or install stainless steel draw brand.
3.6 CLEANING
A. Clean-up and remove daily from the site all wrappings, empty containers, paper, loose particles and other debris resulting from these operations.
B. Remove asphalt markings from finished surfaces.
C. Repair or replace defaced or disfigured finishes caused by Work of this section.
3.7 PROTECTION
A. Provide traffic ways, erect barriers, fences, guards, rails, enclosures, chutes and the like to protect personnel, roofs and structures, vehicles and utilities.
B. Protect exposed surfaces of finished walls with tarps to prevent damage.
C. Plywood for traffic ways required for material movement over existing roofs shall be not less than 5/8 inch (16 mm) thick.
D. In addition to the plywood listed above, an underlayment of minimum 1/2 inch (13 mm) recover board is required on new roofing.
E. Special permission shall be obtained from the Manufacturer before any traffic shall be permitted over new roofing.
3.8 FIELD QUALITY CONTROL
A. Inspection:
1. Warranty shall be issued upon manufacturer's acceptance of the installation.
2. Field observations shall be performed by a Sales Representative employed full-
time by the manufacturer and whose primary job description is to assist, inspect and approve membrane installations for the manufacturer.
3. Provide observation reports from the Sales Representative indicating procedures followed, weather conditions and any discrepancies found during inspection.
4. Provide a final report from the Sales Representative, certifying that the roofing system has been satisfactorily installed according to the project specifications, approved details and good general roofing practice.
END OF SECTION
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SECTION 07550
PUBLIC WORKS C
PART 1 GENERAL
1.1 SCOPE OF WORK
A. Provide all labor, equipment, and miscellaneous materials to install City purchased and furnished roofing materials over the properly prepared substrate
1. All products listed in 2.1, D will be furnished by the City. All products not listed in 2.1, D are to be furnished by the Contractor. All products listed in 2.1, D will be manufactured by The Garland Company and purchased by City of Compton.
B. Roof Replacement: Public Works C
1. Fill in the flutes of the metal panel with EPS insulation. Install EPS crickets on the high side of all equipment.
2. Mechanically fasten Densdeckprime ½” per wind uplift requirements. Zone 1 – 12, Zone 2 – 18, Zone 3 – 24. Tape all seams of the insulation.
3. Torch apply SBS modified HPR Torch Base Sheet.
4. Apply KEE Stone FB 60 sheet in KEE Lock Splatter Foam. All seams to be heat weld.
5. Flashing Details:
a. All flashing areas to have two layers of torch base sheet. b. Equipment / Wall Flashings: Apply SBS-modified flashing ply in all flashing areas – Torch Base Sheet – extending the flashing base ply 9” onto the roof field. Torch apply SBS-modified flashing cap sheet in all flashing areas – KEE Stone FB 60 – extending 12” onto the roof field.
All seams to butt against each other; then apply a KEE Stone Utility Roll heat welded over the seam.
c. Perimeter Edge: Install wood nailer as required. Install clad metal.
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1) Where existing, Install new, 24 gauge gutters (seamless, box, kynar, K-style).
d. All sheet metal to be installed with ANSI SPRI ES-1 compliant metal. e. Install KEE pipe boots per manufacturer details. Note: L metal supports to be replaced with tubular penetration supports.
6. Duct Work / Metal Pans / Roof Hatch: Apply structural tape to all duct work seams. Coat the duct work at 3 gal per sq with Cool Sil coating.
7. Install new vent tops.
8. Raise equipment curbs to min 8” height above the roof field.
1.2 REFERENCES
A. ASTM D 41 - Standard Specification for Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing.
B. ASTM D 312 - Standard Specification for Asphalt used in Roofing.
C. ASTM D 1079 Standard Terminology Relating to Roofing, Waterproofing and Bituminous Materials.
D. ASTM D 2178 Standard Specification for Asphalt Glass Felt Used in Roofing and Waterproofing.
E. ASTM D 5147 Standard Test Method for Sampling and Testing Modified Bituminous Sheet Materials.
F. ASTM D 6162 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements.
G. ASTM D 6163 Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using Glass Fiber Reinforcements.
H. ASTM D 6754 - Standard Specification for Ketone Ethylene Ester (KEE) Sheet Roofing.
I. National Roofing Contractors Association (NRCA): Roofing and Waterproofing Manual.
J. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) - Architectural Sheet Metal Manual.
K. Underwriters Laboratories, Inc. (UL): Fire Hazard Classifications.
L. ANSI-SPRI ES-1 Wind Design Standard for Edge Systems used with Low Slope Roofing Systems.
M. ASCE 7, Minimum Design Loads for Buildings and Other Structures
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N. UL - Fire Resistance Directory.
O. California Title 24 Energy Efficient Standards.
1.3 SUBMITTALS
A. Product Data: Manufacturer's data sheets on each product to be used, including:
1. Preparation instructions and recommendations.
2. Storage and handling requirements and recommendations.
3. Installation instructions.
B. Shop Drawings: Submit shop drawings including installation details of roofing, flashing, fastening, insulation and vapor barrier, including notation of roof slopes and fastening patterns of insulation and base modified bitumen membrane, prior to job start.
C. Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic inspection and maintenance of all completed roofing work. Provide product warranty executed by the manufacturer. Assist Owner in preparation and submittal of roof installation acceptance certification as may be necessary in connection with fire and extended coverage insurance on roofing and associated work.
1.4 QUALITY ASSURANCE
A. Perform Work in accordance with NRCA Roofing and Waterproofing Manual.
B. Manufacturer Qualifications: Company specializing in manufacturing products specified with documented ISO 9001 certification and minimum of twelve years of documented experience and must not have been in Chapter 11 bankruptcy during the last five years.
C. Installer Qualifications: Company specializing in performing Work of this section with minimum five years documented experience and a certified Pre-Approved Garland Contractor.
D. Installer's Field Supervision: Maintain a full-time Supervisor/Foreman on job site during all phases of roofing work while roofing work is in progress.
E. Product Certification: Provide manufacturer's certification that materials are manufactured in the United States and conform to requirements specified herein, are chemically and physically compatible with each other, and are suitable for inclusion within the total roof system specified herein.
F. Source Limitations: Obtain all components of roof system from a single manufacturer. Secondary products that are required shall be recommended and approved in writing by the roofing system Manufacturer. Upon request of the Architect or Owner, submit Manufacturer's written approval of secondary components in list form, signed by an authorized agent of the Manufacturer.
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1.5 PRE-INSTALLATION MEETINGS
A. Convene minimum two weeks prior to commencing Work of this section.
B. Review installation procedures and coordination required with related Work.
C. Inspect and make notes of job conditions prior to installation:
1. Record minutes of the conference and provide copies to all parties present.
2. Identify all outstanding issues in writing designating the responsible party for follow-up action and the timetable for completion.
3. Installation of roofing system shall not begin until all outstanding issues are resolved to the satisfaction of the Architect.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Deliver and store products in manufacturer's unopened packaging with labels intact until ready for installation.
B. Store all roofing materials in a dry place, on pallets or raised platforms, out of direct exposure to the elements until time of application. Store materials at least 4 inches above ground level and covered with "breathable" tarpaulins.
C. Stored in accordance with the instructions of the manufacturer prior to their application or installation. Store roll goods on end on a clean flat surface except store KEE-Stone FB 60 rolls flat on a clean flat surface. No wet or damaged materials will be used in the application.
D. Store at room temperature wherever possible, until immediately prior to installing the roll. During winter, store materials in a heated location with a 50 degree F (10 degree C) minimum temperature, removed only as needed for immediate use. Keep materials away from open flame or welding sparks.
E. Avoid stockpiling of materials on roofs without first obtaining acceptance from the Architect/Engineer.
F. Adhesive storage shall be between the range of above 50 degree F (10 degree C) and below 80 degree F (27 degree C). Area of storage shall be constructed for flammable storage.
1.7 COORDINATION
A. Coordinate Work with installing associated metal flashings as work of this section proceeds.
1.8 PROJECT CONDITIONS
A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
1.9 WARRANTY
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A. Upon completion of the work, provide the Manufacturer's written and signed NDL Warranty, warranting that, if a leak develops in the roof during the term of this warranty, due either to defective material or defective workmanship by the installing contractor, the manufacturer shall provide the Owner, at the Manufacturer's expense, with the labor and material necessary to return the defective area to a watertight condition.
1. Warranty Period:
a. 20 years from date of acceptance.
B. Installer is to guarantee all work against defects in materials and workmanship for a period indicated following final acceptance of the Work.
1. Warranty Period:
a. 5 years from date of acceptance.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. The design is based upon roofing systems engineered and manufactured by The Garland Company:
1. The Garland Company
Miles Taylor
310.367.7655
B. Roofing Contractor to be responsible for all Garland materials in excess of City purchased and furnished amount. City to provide material quantities matching the specified amount below. Any additional Garland material required to complete the project is the responsibility of the roofing contractor. Roofing Contractor responsible for purchasing additional materials required, including all freight and tax charges.
C. Roofing contractor to be at delivery of City purchased roof materials. The City has no responsibility to provide any equipment for handling and / or loading the materials to the Contractor’s trucks. Upon signature of delivery, the roofing contractor assumes full responsibility for all City purchased roof materials. Any materials lost or stolen are the responsibility of the roofing contractor to replace.
Roofing Contractor responsible for freight and tax on the replaced materials.
D. Maximum quantity of the OFCI materials to be provided for all roofing which will be provided to the Contractor is as follows:
Material Amount Unit Size
HPR Torch Base Sheet 53 Roll
KEE Stone FB 60 - 8' x 100' 5 Roll
KEE Stone FB 60 - 8' x 50' 3 Roll
KEE Stone Utility Roll 1 Roll
KEE Stone FB 60 Flashing - 4' 3 Roll
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KEE Lock Splatter Foam 3 Catridge
KEE Lock Mastic 2 3 Gal
Unibond ST 4" Tape 1 Roll
Tuff Stuff Natural White 10 Tube
2.2 COLD APPLIED 2-PLY THERMOPLASTIC HYBRID ROOF SYSTEM - KEE-Stone FB 60
A. Thermoplastic Cap (Ply) Sheet: One ply bonded to the prepared substrate with Interply Adhesive (2):
1. KEE-Stone FB 60:
B. Interply Adhesive: (2)
1. KEE-Lock Foam
C. Flashing Base Ply: One ply bonded to the prepared substrate with Flashing Ply Adhesive:
1. CI Ultra-Shield Torchbase:
D. Flashing Cap (Ply) Sheet: One ply bonded to the prepared substrate with Flashing Ply Adhesive:
1. KEE-Stone FB 60 Flashing.
E. Flashing Ply Adhesive (2):
1. KEE-Lock Foam
2.3 ACCESSORlES:
A. Roof Insulation: Provide G-P Gypsum DenDeck Prime, G-P Gypsum DenDeck DuraGuard, USG Securrock for proper adhesion of the self-adhered base sheet in accordance with Section 07220.
B. Nails and Fasteners: Non-ferrous metal or galvanized steel, except that hard copper nails shall be used with copper; aluminum or stainless steel nails shall be used with aluminum; and stainless steel nails shall be used with stainless steel, Fasteners shall be self-clinching type of penetrating type as recommended by the deck manufacturer.
Fasten nails and fasteners flush-driven through flat metal discs not less than 1 inch (25 mm) diameter. Omit metal discs when one-piece composite nails or fasteners with heads not less than 1 inch (25 mm) diameter are used.
C. Butyl Tape: 100% solids, asbestos free and compressive tape designed to seal as recommended and furnished by the membrane manufacturer.
D. Glass Fiber Cant - Glass Cant: Continuous triangular cross Section made of inorganic fibrous glass used as a cant strip as recommended and furnished by the membrane manufacturer.
2.4 EDGE TREATMENT AND ROOF PENETRATION FLASHINGS
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A. Vents and Breathers: Heavy gauge aluminum and fully insulated vent that allows moisture and air to escape but not enter the roof system as recommended and furnished by the membrane manufacturer.
B. Pitch pans, Rain Collar 24 gauge stainless or 20oz (567gram) copper. All joints should be welded/soldered watertight. See details for design.
C. Drain Flashings should be 4lb (1.8kg) sheet lead formed and rolled.
D. Plumbing stacks should be 4lb (1.8kg) sheet lead formed and rolled.
E. Fabricated Flashings: Fabricated flashings and trim are specified in Section 07620.
1. Fabricated flashings and trim shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the CDA Copper Development Association "Copper in Architecture - Handbook" as applicable.
F. Manufactured Roof Specialties: Shop fabricated copings, fascia, gravel stops, control joints, expansion joints, joint covers and related flashings and trim are specified in Section 07710.
1. Manufactured roof specialties shall conform to the detail requirements of SMACNA "Architectural Sheet Metal Manual" and/or the NRCA "Roofing and Waterproofing Manual" as applicable.
PART 3 EXECUTION
3.1 EXAMINATION
A. Do not begin installation until substrates have been properly prepared.
B. Inspect and approve the deck condition, slopes and fastener backing if applicable, parapet walls, expansion joints, roof drains, stack vents, vent outlets, nailers and surfaces and elements.
C. Verify that work penetrating the roof deck, or which may otherwise affect the roofing, has been properly completed.
D. If substrate preparation and other conditions are the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2 PREPARATION
A. General: Clean surfaces thoroughly prior to installation.
1. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
2. Fill substrate surface voids that are greater than 1/4 inch wide with an acceptable fill material.
3. Roof surface to receive roofing system shall be smooth, clean, free from loose gravel, dirt and debris, dry and structurally sound.
4. Wherever necessary, all surfaces to receive roofing materials shall be power broom and vacuumed to remove debris and loose matter prior to starting work.
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5. Do not apply roofing during inclement weather. Do not apply roofing membrane to damp, frozen, dirty, or dusty surfaces.
6. Fasteners and plates for fastening components mechanically to the substrate shall provide a minimum pull-out capacity of 300 lbs. (136 k) per fastener.
Base or ply sheets attached with cap nails require a minimum pullout capacity of 40 lb. per nail.
7. Prime decks where required, in accordance with requirements and recommendations of the primer and deck manufacturer.
B. Wood Deck:
1. Dimensional wood deck shall be minimum 1 inch (25 mm) thick, knotholes and cracks larger than 1/4 inch shall be covered with sheet metal. All boards shall be appropriately nailed and have adequate end bearing to the centers of beams/rafters. Lumber shall be kiln dried.
2. Plywood shall be a minimum 15/32 inch (11.9 mm) thick and conform to the standards and installation requirements of the American Plywood Association (APA).
3. If no roof insulation is specified, provide a suitable dry sheathing paper, followed by an approved base sheet nailed appropriately for the specified roof system, with 1 inch (25 mm) diameter caps and annular nails unless otherwise required by the applicable Code or Approval agency.
4. Insulation is to be mechanically attached in accordance with the insulation manufacturer's recommendations unless otherwise required by the applicable Code.
5. In all retrofit roof applications, it is required that deck be inspected for defects.
Any defects are to be corrected per the deck manufacturer's recommendations and standards of the APA/Engineered Wood Association prior to new roof application.
6. Light metal wall ties or other structural metal exposed on top of the wood deck shall be covered with one ply of a heavy roofing sheet, such as HPR Glasbase Base Sheet, extending 2 inches to 6 inches (51 mm to 152 mm) beyond the metal in all directions. Nail in place before applying the base ply.
3.3 INSTALLATION - GENERAL
A. Install modified bitumen membranes and flashings in accordance with manufacturer's instructions and with the recommendations provided by the National Roofing Contractors Association's Roofing & Waterproofing Manual, the Asphalt Roofing Manufacturers Association, and applicable codes.
B. General: Avoid installation of modified bitumen membranes at temperatures lower than 40-45 degrees F. When work at such temperatures unavoidable use the following precautions:
1. Take extra care during cold weather installation and when ambient temperatures are affected by wind or humidity, to ensure adequate bonding is achieved between the surfaces to be joined. Use extra care at material seam welds and where adhesion of the applied product to the appropriately prepared substrate as the substrate can be affected by such temperature constraints as
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well.
2. Unrolling of cold materials, under low ambient conditions must be avoided to prevent the likelihood of unnecessary stress cracking. Rolls must be at least 40 degrees F at the time of application. If the membrane roll becomes stiff or difficult to install, it must be replaced with roll from a heated storage area.
C. Commence installation of the roofing system at the lowest point of the roof (or roof area), working up the slope toward the highest point. Lap sheets shingle fashion so as to constantly shed water
D. All slopes greater than 2:12 require back-nailing to prevent slippage of the ply sheets. Use ring or spiral-shank 1 inch cap nails, or screws and plates at a rate of 1 fastener per ply (including the membrane) at each insulation stop. Place insulation stops at 16 ft o.c. for slopes less than 3:12 and 4 feet o.c. for slopes greater than 3:12.
On non-insulated systems, nail each ply directly into the deck at the rate specified above. When slope exceeds 2:12, install all plies parallel to the slope (strapping) to facilitate backnailing. Install 4 additional fasteners at the upper edge of the membrane when strapping the plies.
3.4 INSTALLATION ROOF SYSTEM
A. Base Ply: To be installed at all flashing ply areas. Extend 2’ into the field at all areas.
1. Cut base ply sheets into 18 foot lengths and allow plies to relax before installing. Install base sheet in Interply Adhesive: applied at the rate required by the manufacturer. Shingle base sheets uniformly to achieve one ply throughout over the prepared substrate. Shingle in proper direction to shed water on each large area of roofing.
2. Lap ply sheet ends 8 inches. Stagger end laps 12 inches minimum.
3. Solidly bond to the substrate and adjacent ply with specified cold adhesive at the rate of 2 to 2-1/2 gallons per 100 square feet.
4. Roll must push a puddle of adhesive in front of it with adhesive slightly visible at all side laps. Use care to eliminate air entrapment under the membrane.
5. Install subsequent rolls of modified across the roof as above with a minimum of 4 inch side laps and 8 inch staggered end laps. Lay modified membrane in the same direction as the underlayers but the laps shall not coincide with the laps of the base layers.
6. Extend plies 2 inches beyond top edges of cants at wall and projection bases.
7. Install base flashing ply to all perimeter and projection details.
8. Allow the one ply of base sheet to cure at least 30 minutes before installing the modified membrane. However, the modified membrane must be installed the same day as the base plies.
B. Thermoplastic Cap Ply: Allow plies to relax before installing. Install in interplay adhesive applied at the rate required by the manufacturer. Shingle sheets uniformly over the prepared substrate to achieve the number of plies specified. Shingle in proper direction to shed water on each large area of roofing.
1. All field seams exceeding 10 feet in length shall be welded with an approved
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automatic welder.
2. All field seams must be clean and dry prior to initiating any field welding.
Remove foreign materials from the seams (dirt, oils, etc.) with acetone or authorized alternative. Use CLEAN WHITE COTTON cloths and allow approximately five minutes for solvents to dissipate before initiating the automatic welder. Do not use denim or synthetic rags for cleaning.
3. Contaminated areas within a membrane seam will inhibit proper welding and will require a membrane patch or strip.
4. All welding shall be performed only by qualified personnel to ensure the quality and continuity of the weld. The lap or seam area of the membrane may be intermittently tack welded to hold the membrane in place.
5. The back interior edge of the membrane shall be welded first, with a thin, continuous weld to concentrate heat along the exterior edge of the lap during the final welding pass.
6. Follow local code requirements for electric supply, grounding and surge protection. The use of a dedicated, portable generator is highly recommended to ensure a consistent electrical supply, without fluctuations that can interfere with weld consistency.
7. Properly welded seams shall utilize a 1.5 inch wide nozzle, to create a homogeneous weld, a minimum of 1.5 inches in width.
C. Fibrous Cant Strips: Provide non-combustible perlite or glass fiber cant strips at all wall/curb detail treatments where angle changes are greater than 45 degrees. Cant may be set in approved cold adhesives, hot asphalt or mechanically attached with approved plates and fasteners.
D. Wood Blocking, Nailers and Cant Strips: Provide wood blocking, nailers and cant strips as specified in Section 06114.
1. Provide nailers at all roof perimeters and penetrations for fastening membrane flashings and sheet metal components.
2. Wood nailers should match the height of any insulation, providing a smooth and even transition between flashing and insulation areas.
3. Nailer lengths should be spaced with a minimum 1/8 inch gap for expansion and contraction between each length or change of direction.
4. Nailers and flashings should be fastened in accordance with Factory Mutual "Loss Prevention Data Sheet 1- 49, Perimeter Flashing" and be designed to be capable of resisting a minimum force of 200 lbs/lineal foot in any direction.
E. Metal Work: Provide metal flashings, counter flashings, parapet coping caps and thru-wall flashings as specified in Section 07620 or Section 07710. Install in accordance with the SMACNA "Architectural Sheet Metal Manual" or the NRCA Roofing Waterproofing manual.
F. Termination Bar: Provide a metal termination bar or approved top edge securement at the terminus of all flashing sheets at walls and curbs. Fasten the bar a minimum of 8 inches (203 mm) o/c to achieve constant compression. Provide suitable, sealant at the top edge if required.
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G. Flashing Base Ply: Install flashing sheets by the same application method used for the base ply.
1. Seal curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.
2. Prepare all walls, penetrations, expansion joints and where shown on the Drawings to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.
3. Adhere to the underlying base ply with specified flashing ply adhesive unless otherwise specified. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces.
4. Solidly adhere the entire flashing ply to the substrate. Secure the tops of all flashings that are not run up and over curb through termination bar fastened at 6 inches (152 mm) O.C. and sealed at top.
5. Seal all vertical laps of flashing ply with a three-course application of trowel- grade mastic and fiberglass mesh.
6. Coordinate counter flashing, cap flashings, expansion joints and similar work with modified bitumen roofing work as specified.
7. Coordinate roof accessories, miscellaneous sheet metal accessory items, including piping vents and other devices with the roofing system work.
8. Secure the top edge of the flashing sheet using a termination bar only when the wall surface above is waterproofed, or nailed 4 inches on center and covered with an acceptable counter flashing.
H. Flashing Cap Ply:
1. Seal curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.
2. Prepare all walls, penetrations, expansion joints and where shown on the Drawings to be flashed with required primer at the rate of 100 square feet per gallon. Allow primer to dry tack free.
3. Adhere to the underlying base flashing ply with specified flashing ply adhesive unless otherwise specified. Nail off at a minimum of 8 inches (203 mm) o.c. from the finished roof at all vertical surfaces.
4. Coordinate counter flashing, cap flashings, expansion joints and similar work with modified bitumen roofing work as specified.
5. Coordinate roof accessories, miscellaneous sheet metal accessory items with the roofing system work.
6. All stripping shall be installed prior to flashing cap sheet installation.
7. Heat and scrape granules when welding or adhering at cut areas and seams to granular surfaces at all flashings.
8. Secure the top edge of the flashing sheet using a termination bar only when the wall surface above is waterproofed, or nailed 4 inches on center and covered with an acceptable counter flashing.
3.5 INSTALLATION EDGE TREATMENT AND ROOF PENETRATION FLASHING
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A. Metal Edge:
1. Inspect the nailers to assure proper attachment and configuration.
2. Run base ply over the edge. Assure coverage of all wood nailers.
3. Install continuous cleat and fasten at 6 inches (152 mm) o.c.
4. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailers every 3 inches (76 mm) o.c. staggered.
5. Prime metal edge and allow to dry. Do not prime when Green-Lock Plus Membrane Adhesive is used for the base ply lightly sand metal to improve bond.
6. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches (152 mm) on to the field of roof. Assure ply laps do not coincide with metal laps.
7. Install the thermoplastic Cap Ply in bitumen or foam adhesive over the base flashing ply, 9 inches (228 mm) on to the field of the roof. Heat weld outside edge of the membrane to the Thermoplastic Cap Ply of the field.
B. Roof Edge With Gutter:
1. Inspect the nailer to assure proper attachment and configuration. Increase slope at metal edge by additional degree of slope in first board.
2. Run base ply over the edge. Assure coverage of all wood nailers.
3. Install gutter and strapping.
4. Install continuous cleat and fasten at 6 inches (152 mm) o.c.
5. Install new metal edge hooked to continuous cleat and set in bed of roof cement. Fasten flange to wood nailer every 3 inches (76 mm) o.c. staggered.
6. Prime metal edge and allow to dry. Do not prime for Green-Lock System lightly sand metal to improve bond.
7. Strip in flange with base flashing ply covering entire flange in bitumen with 6 inches (152 mm) onto the field of the base ply. Assure ply laps do not coincide with metal laps.
8. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.
9. Install a second ply of thermoplastic flashing cap ply heat welded over the thermoplastic cap ply, 9 inches (228 mm) on to the field of the roof.
C. Reglet Mounted Counterflashing:
1. Minimum flashing height is 8 inches (203 mm) above finished roof height.
Maximum flashing height is 24 inches. Prime vertical wall and allow to dry.
2. Set cant in bitumen. Run all base field plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to the base field ply and set in bitumen.
4. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.
5. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.
6. Apply butyl tape to wall behind flashing. Secure termination bar through flashing, butyl tape and into wall. Alternatively use caulk to replace the butyl
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tape.
7. Cut reglet in masonry one joint above flashing.
8. Secure reglet counterflashing with expansion fasteners and caulk reglet opening.
D. Expansion Joint:
1. Minimum curb height is 8 inches (203 mm) above finished roof height.
Chamfer top of curb. Prime vertical curb and allow to dry.
2. Mechanically attach wood cant to expansion joint nailers. Run all base field plies over cant a minimum of 2 inches (50 mm).
3. Install compressible insulation in neoprene cradle.
4. Install base flashing ply covering curb set in bitumen with 6 inches (152 mm) on to field of the roof.
5. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.
6. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.
7. Install pre-manufactured expansion joint cover. Fasten sides at 12 inches (609 mm) o.c. with fasteners and neoprene washers. Furnish all joint cover laps with butyl tape between metal covers.
E. Curb Detail/Air Handling Station:
1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical and allow to dry.
2. Set cant in bitumen. Run all base field plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering the curb set in bitumen with 6 inches (152 mm) on to the base field ply and set in bitumen.
4. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.
5. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.
6. Install pre-manufactured counterflashing with fasteners and neoprene washers or per manufacturer's recommendations.
7. Set equipment on neoprene pad and fasten as required by equipment manufacturer.
F. Skylight:
1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical and allow to dry.
2. Set cant in bitumen. Run all base field plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to the base field ply and set in bitumen.
4. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.
5. Install the thermoplastic flashing ply in bitumen or foam over the base flashing
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ply, 9 inches (228 mm) on to the field of the roof.
6. Install pre-manufactured lens and fasten flashing sides at 8 inches (203 mm) o.c. with fasteners and neoprene washers.
G. Passive Vent/Air Intake:
1. Minimum curb height is 8 inches (203 mm) above finished roof height. Prime vertical and allow to dry.
2. Set cant in bitumen. Run all base field plies over cant a minimum of 2 inches (50 mm).
3. Install base flashing ply covering wall set in bitumen with 6 inches (152 mm) on to the base field ply and set in bitumen.
4. Then install thermoplastic cap field ply run over the base flashing ply in bitumen or foam adhesive.
5. Install the thermoplastic flashing ply in bitumen or foam over the base flashing ply, 9 inches (228 mm) on to the field of the roof.
6. Install passive vent/air intake over the wood nailers and flashing to act as counterflashing. Fasten per manufacturer's recommendations.
H. Plumbing Stack:
1. Minimum stack height is 12 inches (609 mm).
2. Run roof base ply over the entire surface of the roof. Seal the base of the stack with elastomeric sealant.
3. Prime flange of new sleeve. Install properly sized sleeves set in 1/4 inch (6 mm) bed of roof cement.
4. Install base flashing ply in bitumen.
5. Install thermoplastic cap ply in bitumen or foam adhesive.
6. Caulk the intersection of the membrane with elastomeric sealant.
7. Turn sleeve a minimum of 1 inch (25 mm) down inside of stack.
I. Heat Stack:
1. Minimum stack height is 12 inches (609 mm).
2. Run roof base ply over the entire surface of the roof. Seal the base of the stack with elastomeric sealant.
3. Prime flange of new sleeve. Install properly sized sleeves set in 1/4 inch (6 mm) bed of roof cement.
4. Install base flashing ply in bitumen.
5. Install thermoplastic cap ply in bitumen or foam adhesive.
6. Caulk the intersection of the membrane with elastomeric sealant.
7. Install new collar over cape. Weld collar or install stainless steel draw brand.
3.6 CLEANING
A. Clean-up and remove daily from the site all wrappings, empty containers, paper, loose particles and other debris resulting from these operations.
B. Remove asphalt markings from finished surfaces.
C. Repair or replace defaced or disfigured finishes caused by Work of this section.
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3.7 PROTECTION
A. Provide traffic ways, erect barriers, fences, guards, rails, enclosures, chutes and the like to protect personnel, roofs and structures, vehicles and utilities.
B. Protect exposed surfaces of finished walls with tarps to prevent damage.
C. Plywood for traffic ways required for material movement over existing roofs shall be not less than 5/8 inch (16 mm) thick.
D. In addition to the plywood listed above, an underlayment of minimum 1/2 inch (13 mm) recover board is required on new roofing.
E. Special permission shall be obtained from the Manufacturer before any traffic shall be permitted over new roofing.
3.8 FIELD QUALITY CONTROL
A. Inspection: Provide manufacturer's field observations at start-up and at intervals of approximately 30 percent, 60 percent and 90 percent completion. Provide a final inspection upon completion of the Work.
1. Warranty shall be issued upon manufacturer's acceptance of the installation.
2. Field observations shall be performed by a Sales Representative employed full- time by the manufacturer and whose primary job description is to assist, inspect and approve membrane installations for the manufacturer.
3. Provide observation reports from the Sales Representative indicating procedures followed, weather conditions and any discrepancies found during inspection.
4. Provide a final report from the Sales Representative, certifying that the roofing system has been satisfactorily installed according to the project specifications, approved details and good general roofing practice.
3.9 SCHEDULES
A. Thermoplastic/Modified Cap (Ply) Sheet:
1. KEE-Stone FB 60: 60 mil thermoplastic, ketone ethylene ester (KEE) roofing membrane with polyester scrim. ASTM D6754
a. Breaking Strength, ASTM D 751, Proc. B, strip
1) 375 lbf. (1,668 N)
b. Tear Strength ASTM D 751
1) 120 lbf. min. (534 N)
c. Elongation at Break (%), ASTM D 751, Proc. B, Strip 1) 40.0%
B. Interply Adhesive:
1. KEE-Lock Foam: Dual component, single bead (ribbon applied) urethane insulation/membrane adhesive.
a. Tensile Strength (ASTM D 412) 250 psi
b. Density (ASTM D 1875) 8.5 lbs./gal.
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c. Viscosity (ASTM D 2556) 22,000 - 60,000 cP
d. Peel Strength (ASTM D 903) 17 lb./in.
e. Flexibility (ASTM D 816) Pass @ -70 deg. F (-56.7 deg. C) C. Flashing Ply Adhesive:
1. KEE-Lock Foam: Dual component, single bead (ribbon applied) urethane insulation/membrane adhesive.
a. Tensile Strength (ASTM D 412) 250 psi
b. Density (ASTM D 1875) 8.5 lbs./gal.
c. Viscosity (ASTM D 2556) 22,000 - 60,000 cP
d. Peel Strength (ASTM D 903) 17 lb./in.
e. Flexibility (ASTM D 816) Pass @ -70 deg. F (-56.7 deg. C) D. Surfacing:
1. Flashing Cap (Ply) Sheet:
a. KEE-Stone FB 60 Flashing: 60 mil thermoplastic, ketone ethylene ester (KEE) roofing membrane with polyester scrim. ASTM D 6754. 1) Breaking Strength, ASTM D 751, Proc. B, strip
a) 378 lbf
2) Tear Strength ASTM D 751
a) 120 lbf. minumum.
3) Elongation at Break (%), ASTM D 751, Proc. B, Strip a) 40.0%
END OF SECTION
City of Vista Addendum 1
Public Works Building C
1. Will the roofing contractor be responsible for raising all necessary HVAC units, vents and penetrations and all the necessary components to meet the required 8” height above new roof line per NCRA recommendations?
a. Yes
2. How does the roofing contractor detail the vision screen posts? a. Vision screen to be removed and thrown away.
3. Will the roofing contractor upgrade the roof hatch and OSHA required safety railing? a. Yes. New roof hatch and ballast safety guard rail to be install
Curbside Café
1. Will City of Vista be providing an asbestos report?
a. Yes. Will be provided by end of week.
2. Will contractor be responsible for installing a new surface mounted counterflashing at the lower canopy section?
a. Yes. Follow Garland detailing for surface mounted counter flashing.
3. See attached asbestos report for proper disposal of material at Curbside Cafe.
City of Vista Addendum 1
Public Works Building C
1. Will the roofing contractor be responsible for raising all necessary HVAC units, vents and penetrations and all the necessary components to meet the required 8” height above new roof line per NCRA recommendations?
a. Yes
2. How does the roofing contractor detail the vision screen posts? a. Vision screen to be removed and thrown away.
3. Will the roofing contractor upgrade the roof hatch and OSHA required safety railing? a. Yes. New roof hatch and ballast safety guard rail to be install
Curbside Café
1. Will City of Vista be providing an asbestos report?
a. Yes. Will be provided by end of week.
2. Will contractor be responsible for installing a new surface mounted counterflashing at the lower canopy section?
a. Yes. Follow Garland detailing for surface mounted counter flashing.
3. See attached asbestos report for proper disposal of material at Curbside Cafe.