Vaulted Roof Insulation Detail

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.

Vaulted roof insulation detail.

Nail 1 furring along every rafter side against the roof deck. In the knee wall area the insulation is in the floor and on the back of the knee wall. There are several options for installing insulation in a vaulted ceiling. Below is 1x decking and 2x4 rafters.

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. As it expands the foam seeks out the gaps cracks and crevices and fills them in. Existing is a fourteen year old roof with 2 of closed cell roofing foam with an acrylic elastomeric coating.

Insulating a vaulted ceiling is similar to insulating exterior walls with. The insulation is not affected by water. Vaulted ceilings can be constructed by either stick framing which means attaching each joist and rafter individually or by setting roof trusses that come engineered from a truss manufacturer with.