Roof Insulation Construction Details

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

Roof insulation construction details.

The insulation can be adhered mechanically fixed or loose laid. In most cases the attic is ventilated and the infiltration barrier is the drywall ceiling. 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. The construction of the flat roof is similar to that of the timber upper floor.

Load bearing or primary structure usually constructed in timber in a residential construction. To get the details most relevant for your project contact us with your specific design build needs. The insulation is immediately below the waterproofing layer. The installation of the rigid insulation elevates the temperature of the roof deck to minimize condensation.

Most details show a second layer of sheathing on top of foam then the roofing material. Roof ceiling insulation insulation in roof ceiling constructions must be placed in direct contact with the infiltration barrier. 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.

And possible for good reason and that s why i am here. Roof insulation systems applications. My concept should yield about an r52. View the complete roofing manual for all product details.