A roof drain with an adjustable extension and strainer is installed over a concrete over Dow Laminated Timber slab with a structural slope. Tapered rigid insulation and a cover board slope down to the drain assembly, topped with SBS modified bituminous roofing. A continuous air and vapor barrier runs beneath the insulation and laps directly into the drain body. A rainwater leader connects to the underside of the drain assembly.
STRAINER ROOF DRAIN WITH ADJUSTABLE EXTENSION RAINWATER LEADER C L COVER BOARD CONC OVER DLT SLAB, S.S.D. TAPERED RIGID INSULATION SBS MODIFIED BITUMINOUS ROOFING WORK POINT CONT AIR VAPOR BARRIER - LAP INTO DRAIN BODY, TYP.
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