Roof Insulation Construction Details

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.

Roof insulation construction details.

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. The insulation can be adhered mechanically fixed or loose laid. Roof ceiling insulation insulation in roof ceiling constructions must be placed in direct contact with the infiltration barrier.

The installation of the rigid insulation elevates the temperature of the roof deck to minimize condensation. And possible for good reason and that s why i am here. Roof insulation systems applications. My concept should yield about an r52.

In this case the insulation must lie directly on top of the ceiling. Roof deck providing the base for the waterproof membrane and in some cases the insulation. The insulation is immediately below the waterproofing layer. In residential wood frame construction this involves installing rigid insulation between the roof shingles and the roof plywood or osb.

The construction of the flat roof is similar to that of the timber upper floor. View the complete roofing manual for all product details. In most cases the attic is ventilated and the infiltration barrier is the drywall ceiling. The vapour control layer is above the decking but below the insulation.