Rigid Insulation Sloped To Roof Drain

A typical interior roof drain assembly occupies about a 4 by 4 square area with a per foot tapered slope.

Rigid insulation sloped to roof drain.

Over the course of the roof system the tapered insulation will create a slope toward the drains which typically ranges from 1 8 slope 1 down every 8 to slope 1 down every 2. As a general rule if the insulation is 2 thick or less a 4 by 4 is sufficient. This is the industry s first one piece pre cut drain sump. Tapered roof insulation systems.

Rigid foam insulation provide performance and value in low slope roofi ng systems and are designed to be used over structural roof decks. Tapered rigid insulation is polyisocyanurate insulation or eps insulation custom manufactured to provide a slope. In contrast tapered expanded polystyrene eps rigid foam insulation is available in blocks up to 40 inches thick and can be cut to virtually any slope depending on the drainage needs of the building. The first piece may go from 1 high to 1 high then the next piece will go from 1 high to 2 high.

Because of its size and customization options tapered eps often can be installed in a single layer. The dimensionally stable gemini drain set provides a 4 way slope to the roof drain to prevent ponding and premature roof failure. Backwash overlayed onadjacent flat over structural slope when roof drains are located a great distance away from a sloped roof edge more than 48 it can be more cost effective to use a tapered backwash. The gemini drain set is the only 4 x 4 drain sump that requires no assembly by the contractor.