Vaulted Roof Insulation Detail

The insulation is not affected by water.

Vaulted roof insulation detail.

There are several options for installing insulation in a vaulted ceiling. 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. 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. Nail 1 furring along every rafter side against the roof deck. Flat roof cathedral ceiling we re going to give it a try. Existing is a fourteen year old roof with 2 of closed cell roofing foam with an acrylic elastomeric coating.

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. In the knee wall area the insulation is in the floor and on the back of the knee wall. 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.