Open Cell Spray Foam Cathedral Ceiling

Spray foam installers missed some of the air leakage sites.

Open cell spray foam cathedral ceiling.

Spray foam installers didn t understand the building envelope and sprayed either too little or too much. The extra depth of traditional 2 x 12 rafters is not needed. Using foam it green spray foam insulation in your cathedral ceiling can give you much. A spray insulation is referred to open cell or closed cell because of the difference between the small bubbles cells that make up the foam.

The higher r value reduces condensation when moist interior air hits the now less cold ceiling vice versa in summer with humid outside air. This is more common with closed cell foam but it happens with open cell foam too. This makes the foam a softer more flexable material. These should have straightforward framing with no skylights and with direct access to soffit and ridge vents.

Cathedral ceilings spray foam insulation. Open cell foam is full of cells that aren t completely encapsulated. In other words the cells are deliberatly left open. Treat your cathedral ceiling just like a wall with a different angle.

When framing the roof of a cathedral ceiling use 2 x 10 lumber for the roof rafters. We are planning on spray foaming the underside side of the roof deck and the insulation contractor is suggesting open cell foam because if the roof ever leaked with closed cell foam it would go undetected and the roof would rot. This is best for simple cathedral ceilings that are easy to ventilate. Foam it green spray foam bonds overhead.

Spray foam contracts and pulls away from framing. Spray foam isn t thick enough. Assuming you have full access to the joist spaces from below you could certainly spray foam up against the roof sheathing. Closed cell foam ceiling insulation in a vaulted ceiling offers substantial advantages over open cell.

Insulating a cathedral ceiling with foam it green. We are in climate zone 4a and we used zip roof. In general closed cell foam is the best choice for unvented cathedral ceilings. It is also one of the most expensive and most building inspectors will not allow it to be left uncovered for fire code reasons.

Hi we are building a new home where the great room section has a cathedral ceiling with dormers on each side. Most experts agree that closed cell foam is best for unvented cathedral ceilings while vented cathedral ceilings can be insulated with less expensive open cell foam. Here s how you do it. A less expensive alternative is the more traditional vented cathedral ceiling insulated with fiberglass cellulose or open cell foam.