Insulating Cathedral Ceiling With Foam Board

In most cases however insulation will not help prevent moisture problems.

Insulating cathedral ceiling with foam board.

A less expensive alternative is the more traditional vented cathedral ceiling insulated with fiberglass cellulose or open cell foam. This is best for simple cathedral ceilings that are easy to ventilate. Attic trusses typically have a sloping ceiling. Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings.

It fills and seals the space and doesn t absorb moisture. Rigid boards are manufactured from either. 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. If you decided to use a rigid foam board to help insulate your cathedral ceiling you would install the board on top of the roof sheathing and underneath the plywood at the top of the roof.

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. These should have straightforward framing with no skylights and with direct access to soffit and ridge vents. 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. Spray foam is a very expensive option however.