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Built-Up Roofing

4-Ply Built-Up Roof System


• Layers of deck surface, rigid roof insulation, asphalt, cover board, ply sheet, asphalt, and reflective roof coating
• Contains mat of glass fiber reinforcement (most single-ply contain none)
• Limits movement of roof with high tensile strength; more than 200 lbs/sq. inch
• Superior water resistance
• Easier installation; no ballast or fasteners

Ballasted Thumb
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Under Construction