DIVISION 7 - THERMAL & MOISTURE PROTECTION
SECTION 07 53 00 - FLEXIBLE SHEET ROOFING SYSTEM
PAGE 3 OF 6
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PART 1 - GENERAL
1.1 Work of this section includes:
.1 Provide a single ply flexible sheet roofing system.
a. Type of system shall be fully adhered. Base bid will be .075 reinforced EPDM with a 20 year warranty. The add Alternate will be a .090 non-reinforced EPDM with a 30 year warranty.
.2 Provide roof insulation.
.3 Refer to Section 07 62 00 for flashing and sheet metal accessories,
except as otherwise noted.
1.2 Quality Assurance
.1 Obtain primary flexible sheet roofing products and material from a
single manufacturer with 20 years experience in the manufacturing of vulcanized thermal set sheeting. Manufacturer must be the primary manufacturer of the EPDM membrane. Secondary marketers of the roofing systems will not be permitted. Provide secondary materials as recommended by manufacturer of primary materials.
.2 Installer Qualifications - A single installer ("Roofer") shall perform the
work of this section and shall be a firm with not less than 10 years of successful experience in installation of flexible sheet roofing systems similar to those required for this project and who is authorized and trained by the manufacturer of primary roofing materials.
.3 Upon completion of the installation, the applicator shall arrange for an inspection by a non-sales technical representative of the manufacturer in accordance with warranty requirements.
.4 Insurance Certification - Provide flexible sheet roofing system and
component materials which have been tested for application and are listed by Underwriters Laboratories, Inc. (UL) for Class A rating and have been evaluated by Factory Mutual for Class FM IA-60 construction.
1.3 Submittals
.1 Submit manufacturer's product data installation instructions and
recommendations for each type of roofing product required.
.2 Submit shop drawing indicating layout of tapered roof insulation.
Include thickness at valleys, ridges, perimeter, etc. as well as configuration of all required crickets.
.3 Material safety data sheets for all adhesives and solvents used.
1.4 Job Conditions
.1 Weather Condition Limitations - Proceed with roofing work only when
existing forecasted weather conditions will permit work to be performed in accordance with manufacturer's recommendations.
1.5 Warranties
.1 Roofer's Guarantee - The Contractor shall guarantee all roofing,
flashing and sheet metal work installed under this contract absolutely watertight and waterproof under this contract from the date of final payment. Submit with bill for final payment the following signed guarantee:
"I hereby agree to keep all roofs and flashings and sheet metal work installed under this contract watertight for a term of two years from date of final payment, using same materials as originally specified. It is further understood and agreed that I will have a workman on the job repairing any leaks reported in less than twenty-four hours after receiving notice by telephone that the roof is leaking. If I fail to make such repairs without delay, the City School District may employ another roofer to do the work and I agree to pay for such repairs."
These repairs will in no way affect the requirements and term of the warranty.
.2 Provide a manufacturer’s 20 (or 30) year warranty covering both labor and materials with no dollar limitation. All products, including substrate boards, vapor retarder, insulation, fasteners, fastening plates and edging must be manufactured and/or supplied by the roofing system manufacturer and covered by the warranty. No pro-rated warranties shall be accepted. The maximum wind speed coverage shall be peak gusts of 90 mph measured at 10 meters above ground level.
PART 2 - PRODUCTS
2.1 General
.1 Provide roofing materials recognized to be of generic type indicated
and tested to show compliance with indicated performances and certified in writing by manufacturer to be equal or better than specified in every significant respect, and acceptable to Architect.
2.2 Roof Insulation
.1 Flat insulation areas shall be in multiple layers of polyisocyanurate as indicated on drawings. R-value as per ASTM C1289-06, (LTTR).
Tapered Insulation and crickets shall be Sure-Seal polyisocyanurate as supplied by Carlisle SynTec Incorporated (or the membrane manufacturers) as shown on drawings. Insulation transitions/step offs greater than ½” will require a transition board such as a wood fiberboard tapered edge strip.
All polyisocyanurate shall be Carlisle SecureShield or approved equal with a closed cell polyisocyanurate core laminated to coated glass fiber mat facers and be as per ASTM 1289-06 Type II, Class 1, Grade 3, 25 PSI.
.2 Underlayment (when applicable) and Overlayment Board (always required) - Provide Securock board as manufactured by Carlisle or approved equal. Minimum thickness is 3/8”.
2.3 EPDM Flexible Sheet Roof Membrane
.1 Provide ethylene propylene diene monomer elastomeric roofing sheet
membrane single ply system, complying with ANSI/RMA IPR-1, and ASTM D 4637, Type I as indicated.
a. Thickness: .075" nominal. (Add Alternate: .090”).
b. Exposed face color: Black
c. Reinforced (Add Alternate: non-reinforced).
2.4 Fully Adhered EPDM Membrane
.1 Available manufacturers: Subject to compliance with requirements,
manufacturers offering products which may be incorporated in the work include, but are not limited to, the following:
a. Carlisle Syntec Systems (Basis of design)
b. Firestone
2.5 Miscellaneous Materials
All adhesives and primers must comply with NY OTC VOC regulations.
.1 Sheet Seaming System - Manufacturer's standard materials for
sealing lapped joints, 6” lap with full lap sealant on all seams. including edge sealer to cover exposed spliced edges as recommended by manufacturer of FSR system. Seam tape to be factory applied.
.2 Flashing Material - Manufacturer's standard system compatible with
flexible sheet membrane.
.3 Membrane Adhesive - As recommended by FSR manufacturer for
particular substrate and project conditions, formulated to withstand min. 60 psf uplift force.
.4 Fasteners and Plates – HP and insulation fasteners shall be appropriate for the type of deck material, of gauge and length and pull resistance as required by the manufacturer.
.5 Metal Edging and Terminations – High performance of materials, gauge, thickness and with pre-slotted (or punched) holes as required by the manufacturer. All roof edging must comply with ES-1 and be Factory Mutual approved.
.6 Walkways – Protective surfacing for roof traffic shall be compatible with the roofing membrane by the manufacturer.
.7 Bitumen for Vapor Barrier - Roofing asphalt, complying with ASTM D
312, Type III.
.8 Vapor Barrier - 2 plies of asphalt-impregnated glass fiber mat
complying with ASTM D 2178, Type VI; GlasPly Premier as manufactured by Johns Manville or the approved equal. Coat with Type III asphalt to 25 lbs. per square between plies.
.9 Vapor retarder option (when approved by Project Architect): Vapor retarder is a 40 mil composite consisting of 35 mils of self-adhering rubberized asphalt laminated to a 5 mil skid resistant polyethylene film. The underlayment board shall be primed with Low VOC CCW-702 Primer or CCW Cav-Grip in accordance with manufacturer’s specifications. Vapor retarder must have a perm rating of 0.05 or less as per ASTM E90. Vapor retarder must be rated by the manufacturer as a temporary roof with an allowable exposure to the elements for 90 days.
PART 3 – EXECUTION
3.1 General Installation Requirements
.1 Comply with manufacturer's published instructions regarding the installation of the flexible sheet roof, except where more stringent requirements are indicated and including proper substrate preparation, jobsite considerations and weather restrictions. All roofing products must be installed complete each day. Phased applications are not acceptable.
.2 Examine all substrates to receive flexible sheet roofing system.
Verify that conditions meet the manufacturer’s requirements for proper installation of flexible sheet roofing.
.3 Protect other work from spillage of roofing materials and prevent liquid materials from entering or clogging drains and conductors. Replace and/or restore other work damaged by installation of roofing system work.
.4 Insurance/Code Compliance - Install flexible sheet roofing system for compliance with the following requirements:
a. Roof system must be installed as per FM IA-60 standards.
b. Underwriters Laboratories (UL) requirements for Class A
rating.
.5 Install membrane by unrolling over prepared substrate, lapping adjoining sheets as recommended by manufacturer. Apply adhesive to surfaces to be bonded and roll FSR into place when adhesive has properly cured. All seams are to be factory applied 6 inch seam tape, tapering application as recommended by manufacturer. Install mechanical fasteners, flashings and counter-flashings and accessories at locations as recommended by manufacturer.
3.2 Vapor Barrier – Surfaces to receive the vapor barrier must be clean, dry and free of any materials previously removed as part of this work. End laps shall be staggered, overlap all edges, avoid wrinkles and fishmouths.
3.3 Roof Insulation
.1 Set the boards, long joints continuous, end joints staggered 1/2
board width in snug contact on all sides. Panels shall be applied to deck in proper sequence, adhered or mechanically attached (as appropriate for substrate) in accordance with roofing manufacturer's recommendation and as specified elsewhere in Division 7, to the roof deck. Insulation adhesive must be applied in beads at no more than 6 inches on center except for the corners which will be installed at no more than 4 inches on center, or insulation adhesive may be applied in a full spray.
3.4 Protection of Roofing
.1 Repair or replace the roofing and associated work to a condition free
of damage and deterioration at time of substantial completion.
.2 Upon completion of this work, all debris from this work and surplus
material shall be removed from the premises.
.3 Clean and snake all drains and downspouts in the effected work area to assure proper drainage from the roof surface.
.4 Notify the Project Inspector at the completion of the work and prior to the request for the manufacturer’s inspection.
END OF SECTION
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