Roof Insulation Construction Details

Roof insulation systems applications.

Roof insulation construction details.

In this case the insulation must lie directly on top of the ceiling. In residential wood frame construction this involves installing rigid insulation between the roof shingles and the roof plywood or osb. 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. 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. And possible for good reason and that s why i am here. The insulation can be adhered mechanically fixed or loose laid. View the complete roofing manual for all product details.

The insulation is immediately below the waterproofing layer. In most cases the attic is ventilated and the infiltration barrier is the drywall ceiling. Roof deck providing the base for the waterproof membrane and in some cases the insulation. The construction of the flat roof is similar to that of the timber upper floor.

The vapour control layer is above the decking but below the insulation. The installation of the rigid insulation elevates the temperature of the roof deck to minimize condensation. 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. To get the details most relevant for your project contact us with your specific design build needs.