Polyiso, tapered insulation and a membrane over the stair and elevator bulkheads.
Layers, in order
| # | Layer | Thickness | Spacing |
|---|---|---|---|
| 1 | Vapor barrier (if specified) | 1/16 in | |
| 2 | 2 in polyiso, R-10 (ISO95+) | 2 in | |
| 3 | Tapered insulation, 1/8 in per ft | 1 in | |
| 4 | Roof membrane (TPO or 2-ply SBS) | 3/16 in | |
| 5 | Treated 3/4 in plywood nailer, stainless gravel stop and fascia, edge strip-in, fascia sump and 3 in downspout | 3/4 in |
Build steps
- Insulate the bulkhead roof (Roofer).
- Set the nailer, the metal edge and the leader (Carpenter / sheet metal). Continuous treated plywood nailer at the edge, the stainless gravel stop and fascia with its sump, and the downspout to the main roof.
- Lay the membrane (Roofer). Strip in the gravel stop flange.
See it in 3D
Every wall and floor in Setout opens as an exploded build-up like this one, layer by layer, with the steps to build it. Try it on the sample building, or see how a Setout takeoff works.