Vaulted Roof Insulation Detail

Our plan is to put rigid board up between the 2x4 s caulk the edges and then hang sheetrock.

Vaulted roof insulation detail.

Nail 1 furring along every rafter side against the roof deck. Fiberglass insulation comes in lightweight batts and rolls precut to widths that match standard stud and rafter spacing. The insulation is not affected by water. In the knee wall area the insulation is in the floor and on the back of the knee wall.

As it expands the foam seeks out the gaps cracks and crevices and fills them in. Below is 1x decking and 2x4 rafters. Among the easiest options is to install rigid insulation sheets over the rafters which not only provides insulation but also the structural function of enclosing the roof. After it sets spray foam insulation forms a rigid durable barrier to prevent the warm air that s inside your living area from exiting through the vaulted ceiling where it no longer has chance to create damp or mould.

Cut and insert 1 or thicker high r foam insulation sheets r 8 per inch against the furring giving a 1 or greater air path between the insulation and the roof deck under the cathedral ceiling. Flat roof cathedral ceiling we re going to give it a try. Insulating a vaulted ceiling is similar to insulating exterior walls with.