Roof drain assembly and overflow drain assembly with sleeve installed in a built-up roofing system over wood framing supported by structural members. The 4-pound lead flashing sheet is set into roof cement over installed ply sheets, with flashing plies and surfacing applied over the lead. No-hub cast iron assemblies connect below the drains with independent lines through the point of discharge. The corners of the drain sump are resealed with a three-course application and a protective white acrylic coating surfacing.
OVERFLOW DRAIN ASSEMBLY W/ SLEEVE ROOF DRAIN ASSEMBLY 4# LEAD FLASHING SHT. SET INTO ROOF CEMENT O/ INSTALLED PLY SHEETS. INSTALL FLASHING PLIES AND SURFACING OVER LEAD BUILT-UP ROOFING O/ STRUCTURE 2 X FRAMING - SEE STRUCTURAL DWGS. NO-HUB CAST IRON ASSEMBLIES U.N.O. 5" 8" MIN 5" 4" 2" NOTES: 1. RESEAL THE CORNERS OF THE DRAIN SUMP WITH A THREE-COURSE APPLICATION WITH A PROTECTIVE WHITE ACRYLIC COATING SURFACING. 2. ROOF DRAIN AND OVERFLOW DRAIN LINES SHALL REMAIN INDEPENDENT THROUGH POINT OF DISCHARGE.
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