The roof assembly consists of a composite steel deck with a concrete fill as specified in the structural drawings. A roof air barrier and vapor retarder are installed directly above the concrete deck. The insulation system includes a base layer of adhered rigid insulation topped with a layer of tapered rigid insulation to provide drainage. A cover board is placed over the insulation, finished with an adhered single-ply polyvinyl chloride membrane. The total assembly is designed for an R-30 thermal resistance value.
R313 R313A R313 EXTERIOR INTERIOR R311 TYPICAL ASSEMBLY R311A VARIABLE A - NO 4" RIGID INSULATION BASE LAYER. R=0 R311 ROOF ASSEMBLY SINGLE PLY THERMOPLASTIC (PVC) MEMBRANE ADHERED LEVELED COMPOSITE STEEL DECK CONCRETE FILL DECK, SEE STRUCTURAL DWGS 07 5419 ROOF AIR BARRIER / VAPOR RETARDER 07 5419 RIGID INSULATION - ADHERED 07 5419 COVER BOARD 07 5419 SINGLE PLY PVC MEMBRANE 07 5419 TAPAERED RIGID INSULATION - ADHERED R=30
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