Roof Insulation Construction Details

The vapour control layer is above the decking but below the insulation.

Roof insulation construction details.

And possible for good reason and that s why i am here. The installation of the rigid insulation elevates the temperature of the roof deck to minimize condensation. Our in house technical department is available to help provide accurate design and construction details for insulfoam products. In this case the insulation must lie directly on top of the ceiling.

The insulation can be adhered mechanically fixed or loose laid. Load bearing or primary structure usually constructed in timber in a residential construction. There are many article on foam over roof sheathing but after much searching i failed to find a detail like the one i have put together. View the complete roofing manual for all product details.

The insulation is immediately below the waterproofing layer. Roof insulation systems applications. Most details show a second layer of sheathing on top of foam then the roofing material. Roof deck providing the base for the waterproof membrane and in some cases the insulation.

A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building. In residential wood frame construction this involves installing rigid insulation between the roof shingles and the roof plywood or osb. My concept should yield about an r52. Roof ceiling insulation insulation in roof ceiling constructions must be placed in direct contact with the infiltration barrier.