Flat Roof Insulation Slope Layout

Good questions regarding water and low slope membrane roofs where slope in the structural roof deck may not be adequate.

Flat roof insulation slope layout.

Roof insulation materials to avoid. Polyiso xps and eps roof. Flat over structural slope backwash detail backwash overlayed on adjacent 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 crickez system helps to simplify roof crickets with quicket.

To add a slight slope to an entirely flat roof to help shed water install tapered foam board insulation underneath a membrane roof. Tapered roof insulation and crickets are designed to provide effective drainage for epdm tpo pvc and built up bur membranes. A note to consider before construction. The goal of tapered roof insulation systems is to eliminate ponding standing water on a membrane when the roof deck does not provide adequate slope.

A properly designed tapered roof insulation system not only provides the necessary r value and the support for the roof system but it helps extend the life of the roof system because it provides. Consider geography budget and use for the roof to determine the best option. If insulation is installed below the flat roof deck this is called a cold roof. From there the flat roof system you choose will determine the materials you apply.