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TranSystems Corporation - LGM Construction

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501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11<br />

G. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance<br />

provisions in FM Approvals 4470, designed for fastening membrane to substrate, and acceptable to<br />

membrane roofing system manufacturer.<br />

H. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings,<br />

preformed inside and outside corner sheet flashings, T-joint covers, lap sealants, termination reglets, and<br />

other accessories.<br />

2.3 SUBSTRATE BOARDS<br />

A. Substrate Board: ASTM C 1177/C 1177M, glass-mat, water-resistant gypsum substrate, 1/2 inch (13 mm)<br />

thick.<br />

1.<br />

Products: Subject to compliance with requirements, provide the following:<br />

a. Georgia-Pacific <strong>Corporation</strong>; Dens Deck.<br />

B. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying with corrosion-resistance<br />

provisions in FM Approvals 4470, designed for fastening substrate board to roof deck.<br />

2.4 VAPOR RETARDER<br />

A. Polyethylene Film: ASTM D 4397, 6 mils (0.15 mm) thick, minimum, with maximum permeance rating of<br />

0.13 perm (7.5 ng/Pa x s x sq. m) .<br />

1. Tape: Pressure-sensitive tape of type recommended by vapor-retarder manufacturer for sealing<br />

joints and penetrations in vapor retarder.<br />

2. Adhesive: Manufacturer's standard lap adhesive, FM Approvals approved for vapor-retarder<br />

application.<br />

2.5 ROOF INSULATION<br />

A. General: Preformed roof insulation boards manufactured by TPO membrane roofing manufacturer,<br />

selected from manufacturer's standard sizes suitable for application, of thicknesses indicated and that<br />

produce FM Approvals-approved roof insulation.<br />

B. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class 1, Grade 2, felt or glass-fiber mat facer<br />

on both major surfaces.<br />

C. Tapered Insulation: Provide factory-tapered insulation boards fabricated to slope of 1/4 inch per 12 inches<br />

(1:48) unless otherwise indicated.<br />

D. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for<br />

sloping to drain. Fabricate to slopes indicated.<br />

THERMOPLASTIC POLYOLEFIN (TPO) ROOFING 07540 - 7

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