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.

There are several options for installing insulation in a vaulted ceiling. Flat roof cathedral ceiling we re going to give it a try. Below is 1x decking and 2x4 rafters. Existing is a fourteen year old roof with 2 of closed cell roofing foam with an acrylic elastomeric coating.

The insulation is not affected by water. 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. 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. 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.

Fiberglass insulation comes in lightweight batts and rolls precut to widths that match standard stud and rafter spacing. Insulating a vaulted ceiling is similar to insulating exterior walls with. As it expands the foam seeks out the gaps cracks and crevices and fills them in.