Insulating A Cathedral Ceiling Spray Foam

First closed cell foam has a 60 percent higher r value per inch than open cell 6 3 vs.

Insulating a cathedral ceiling spray foam.

My goal is simply to make it a. I want to properly insulate my cathedral ceilings and was thinking to spray 2 inches of closed cell foam to sheathing then fill with dense packed cellulose. Foam it green spray foam bonds overhead. May 30 2020 at 9 57 am.

Yes it s completely open from below with the rafters and roof sheathing all exposed see photo. However if you are determined to build an unvented roof then i think that closed cell foam insulation is a better choice. Attic trusses typically have a sloping ceiling. A cathedral ceiling is often difficult to insulate as they leave very little room for ventilation which is needed to keep the insulation dry.

The higher r value reduces condensation when moist interior air hits the now less cold ceiling vice versa in summer with humid outside air. The new workshop will be located over my garage in an area that was framed using attic trusses when we built the new house. 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 ceilings can be quite challenging.

Check out the overhead project video to get some tips and techniques to make this project easier. Hi steve i very much appreciate the quick and detailed reply. High density urethane spray foam provides an airtight seal and high r values making it a good choice for unvented cathedral ceilings. Insulating a cathedral ceiling with foam it green.

Cathedral ceilings insulating with spray foam cathedral ceilings unvented how to seal. Cathedral ceilings spray foam insulation. The spray foam contractor says i m wasting my money since the closed cell foam is 97 efficient. Closed cell foam ceiling insulation in a vaulted ceiling offers substantial advantages over open cell.

I am wondering if i can attach craft paper and pine paneling to the 2x8 rafters and then fill the bays with cellulose. One of the best options would be spray foam insulation here s why. Using foam it green spray foam insulation in your cathedral ceiling can give you much. I just had 3 inches of closed cell foam r21 installed on inside of my cathedral ceiling new const and was planning on adding r19 batt fiberglass over the spray foam.