Insulating Cathedral Ceiling With Foam Board

I m in the early stages of building an amazing workshop to showcase tools over at tool box buzz and shop projects here at hci.

Insulating cathedral ceiling with foam board.

Insulating cathedral ceilings can be quite challenging. It fills and seals the space and doesn t absorb moisture. This is best for simple cathedral ceilings that are easy to ventilate. Foam board insulation would be a more economical especially if you are supplying the labor see photo.

Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings. The new workshop will be located over my garage in an area that was framed using attic trusses when we built the new house. Solve moisture and rot problems in insulated cathedral ceilings with closed cell foam ceiling insulation. Regular ceilings are likely to be under attics with either batt insulation between the joist bays or in some cases rigid insulation between the rafters.

In most cases however insulation will not help prevent moisture problems. Spray foam is a very expensive option however. Attic trusses typically have a sloping ceiling. A less expensive alternative is the more traditional vented cathedral ceiling insulated with fiberglass cellulose or open cell foam.

Rigid foam board installation in the case of a cathedral ceiling involves installing three different layers that are each 1 5 inches thick according to the procedure discussed in this article appearing in fine homebuilding. By the diy experts of the family handyman magazine the foam solution to ceiling moisture problems.