SECTION 07532 SINGLE PLY MEMBRANE ROOFING (EPDM)

PART 1 1.01

GENERAL SUMMARY A.

1.02

SYSTEM DESCRIPTION A.

1.03

1.04

1.05

Section Includes: Mechanically attached elastomeric sheet roofing and related items as shown on Drawings and as specified.

Elastomeric sheet roofing laid loose over roof insulation and mechanically attached to roof deck.

SUBMITTALS A.

Product Data: Submit Manufacturer's Specifications and installation instructions.

B.

Wind Design Review: Submit information required for wind design review on Manufacturer's standard form prior to installation of the roofing system.

QUALITY ASSURANCE A.

Qualifications: 1. Manufacturer: a. Company specializing in manufacturing products specified, with minimum 5 years documented experience. b. Manufacturer shall be the original Manufacturer of the sheet membrane. 2. Installer: Roofing installer with 2 years experience in Work of similar scope and nature to that specified and approved by Manufacturer of roofing material at time of bid.

B.

Certificates: Submit certification from Manufacturer indicating approval of the applicator and submit certifications from both Manufacturer and Applicator that the substrate and the details are proper and adequate for materials being furnished.

C.

Standards: Comply with ANSI/RMA/SPRI requirements for specified roofing system.

DELIVERY, STORAGE AND HANDLING A.

Packing and Shipping: Deliver materials to site in Manufacturer's original unopened packaging with labels intact.

B.

Storage: Adequately protect against damage while stored at the site.

C.

Store and protect insulation from direct sunlight and high temperatures. Insulation Manufacturer for recommendations.

D.

Materials except membrane must be stored between 50 degrees F. (10 degrees C.) and 80 degrees F. (27 degrees C) If exposed to lower temperatures, materials must be restored to 60 degrees F. (16 degrees C.)before using.

98055A Office Building

07532-1

Consult

Rev. 1 December 11, 1998

1.06

PROJECT/SITE CONDITIONS A.

1.07

WARRANTY A.

Warrant sheet roofing against leaks for a period of 10 years.

B.

Upon notification of defects within warranty period, make necessary repairs and replacements at convenience of the Owner.

PART 2 2.01

2.02

Environmental Requirements: Do not install materials during inclement weather or when surface or air temperature is below the minimum recommended by the Manufacturer.

PRODUCTS MANUFACTURERS A.

Furnish products of one of the following manufacturers, except as approved by the Architect, subject to compliance with specifications requirements: 1. Carlisle Corporation, Carlisle, PA (800)233-0551. 2. Firestone Building Products Co., Carmel, IN (317)575-7500. 3. Gen Corp Polymer Products, Maumee, OH (800)443-4272.

B.

Specifications are based on Firestone.

MATERIALS A.

Roofing System: Carlisle Sure-Seal, Firestone Rubbergard, or GenFlex Bar-In-Seam..

B.

Membrane: EPDM Sheet Membrane; 45 mil (1.15mm) thick. Color: White.

C.

Roof Flashing Membrane: Color: White.

D.

Fasteners, Adhesives and Sealants: As required by Manufacturer.

E.

Insulation & Tapered Insulation: Rigid Polyisocyanurate and Isolation Board. Product manufactured by or approved by roofing manufacturer.

F.

Rubber Walkway Pads 30” x 30”: Product manufactured by or approved by roofing manufacturer.

G.

Wood Nailers: Wolman CAA, pressure treated, #2 or better lumber.

H.

All Other Materials: Manufacturer's standard for items required or type best suited for the intended use.

98055A Office Building

EPDM Flashing Membrane, 0.060 inch (1.52mm) thick.

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Rev. 1 December 11, 1998

PART 3 3.01

3.02

3.03

3.04

EXECUTION EXAMINATION A.

Roofing Manufacturer's Representative shall inspect the surfaces and report to the Architect deficiencies or necessary corrections. Roofing application shall not proceed until unsatisfactory conditions have been corrected. Start of Roofing Work shall constitute acceptance of the roof decks as satisfactory to receive the roofing.

B.

Verify that placement of roof openings, drains and other penetrations is correct.

C.

Coordination: Coordinate with other Work which affects, connects with, or will be concealed by this Work.

PREPARATION A.

Preparation of Surfaces: Clean substrate of materials which would impair the Work. Patch cracks, voids and honeycombs to provide a smooth, structurally sound surface. Cut off high spots and grind smooth.

B.

Do not proceed with elastic sheet roofing until nailer strips, curbs, blocking, drains and other items have been installed.

C.

Sheet metal and related items shall be ready to build into assembly as specified or shown on Drawings.

INSULATION INSTALLATION A.

Install only as much insulation as can be covered with roofing membrane and completed before the end of the day's Work or before the onset of inclement weather.

B.

Neatly fit insulation to all penetrations, projections, and nailers. Insulation shall be loosely butted with gaps not greater than 1/4 inch (6mm). Fill gaps greater than 1/4 inch (6mm)with acceptable insulation. Under no circumstances shall the membrane be left unsupported over a space greater than 1/4 inch (6mm). Tapered or feathered insulation shall be installed around roof drains so as to provide proper slope for drainage.

C.

Mechanically fasten insulation with approved fasteners to required penetration in accordance with FM I60. When installing multiple layers of insulation, stagger all joints between layers.

BATTEN INSTALLATION A.

Install perimeter batten consisting of one or more rows of batten strips running parallel to the roof edges in accordance with approved batten layout and Membrane Manufacturer's directions.

B.

Install batten strips using fasteners appropriate for the particular deck type.

C.

Use caution not to overdrive the fasteners as this will cause the batten strip to buckle between the fasteners and could reduce pull-out resistance. Cover batten strips prior to end of Work day.

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Rev. 1 December 11, 1998

3.05

3.06

MEMBRANE INSTALLATION A.

Position roofing membrane over substrate without stretching. Allow membrane to relax approximately one-half hour prior to splicing and flashing. Position adjoining sheets in same manner lapping edges a minimum of 3 inches (76mm).

B.

Splice the outside edge of the top sheet.

C.

Overlap splices a minimum of 3 inches (76mm), bonded with Manufacturer's splice cement. Seal the edge of splices with a bead of lap sealant prior to the end of each working day.

D.

Lay out batten strips in the approved pattern to comply with the minimum requirements for attachment.

E.

Install batten strips using approved fasteners appropriate for the particular deck type. Install each fastener so that it is properly engaged in the deck and the head is flush with the batten strip surface. All batten strips must be covered prior to the end of the Work day.

F.

Position the membrane to overlap a minimum distance of 3 inches (76mm) along the entire length of the splice. Fold the top sheet back to allow for cleaning of both surfaces that are to be spliced.

G.

Apply splice adhesive at required coverage rate.

H.

Clean the lap edge a minimum of 1 inch (25mm) on each side of the lap and apply a continuous bead of lap sealant.

I.

Install batten covers using Membrane Manufacturer's options.

J.

Secure the membrane (base tie-in) at all locations where the membrane ends or goes through an angle change greater than 2 inches (50mm) in 12 inches (300mm) (i.e. roof edges, curbs, interior walls, etc.), except for round pipe penetrations less than 18 inches (460mm) in diameter and square penetrations less than 4 inches (100mm) square. Mechanically fasten batten strips with fasteners as supplied by Membrane Manufacturer.

K.

Flash around perimeter, vents, skylights, and other penetrations with roof flashing membrane using the longest pieces practical. Extend splice at least 3 inches (76mm) beyond rubber nailing strips. Perform flashings and terminations in accordance with Manufacturer's details.

L.

Flash round penetrations (pipes and conduits) passing through the membrane with molded pipe flashings where possible. Where molded pipe flashings cannot be installed, use field fabricated pipe seals.

M.

Roof Drains: Use water cut-off mastic as indicated in Manufacturer's details to achieve seal between membrane and drain base.

N.

Repair wrinkles within 18 inches (460mm) of a splice or a puncture in the membrane. When repairing membrane which has been in service for some time, remove accumulated field dirt.

TEMPORARY WATER CUT-OFFS

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3.08

A.

At end of each working day, install water cut-offs to protect deck against water penetration. Ensure removal of temporary water cut-offs before Work is resumed.

B.

Exercise care to prevent water flow beneath completed sections of roof. Temporarily seal loose edge of membrane with Night Sealant when weather is threatening.

ROOF WALKWAYS A.

Lay out and install specified walkway pads.

B.

Adhere walkway pads to membrane as recommended by Manufacturer.

FIELD QUALITY CONTROL A.

Inspection: Upon completion of roofing system, an authorized Manufacturer's Representative shall inspect the installation for final acceptance.

B.

Manufacturer's Inspection: Completed roofing system shall be inspected by Manufacturer's Field Technician accompanied by Contractor who shall assist as required to provide inspection of the system. END OF SECTION

98055A Office Building

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Rev. 1 December 11, 1998