Insulating A Cathedral Ceiling Spray Foam

My goal is simply to make it a.

Insulating a cathedral ceiling spray foam.

Cathedral ceilings spray foam insulation. 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. 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. The spray foam contractor says i m wasting my money since the closed cell foam is 97 efficient.

Cathedral ceilings insulating with spray foam cathedral ceilings unvented how to seal. 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. I am wondering if i can attach craft paper and pine paneling to the 2x8 rafters and then fill the bays with cellulose. First closed cell foam has a 60 percent higher r value per inch than open cell 6 3 vs.

Attic trusses typically have a sloping ceiling. If you re concerned about how you should be insulating cathedral ceilings icynene spray foam insulation is the ideal choice since it can aid in early detection of situations such as roof leaks and wind driven moisture intrusion icynene spray foam ca be applied to insulate any space or unique angle. Insulating cathedral ceilings can be quite challenging. From my research i thought i needed at least an r40 of insulation in a cathedral ceiling in my zone.

The new workshop will be located over my garage in an area that was framed using attic trusses when we built the new house. A cathedral ceiling is often difficult to insulate as they leave very little room for ventilation which is needed to keep the insulation dry. Hi steve i very much appreciate the quick and detailed reply. Yes it s completely open from below with the rafters and roof sheathing all exposed see photo.

The higher r value reduces condensation when moist interior air hits the now less cold ceiling vice versa in summer with humid outside air. Treat your cathedral ceiling just like a wall with a different angle. However if you are determined to build an unvented roof then i think that closed cell foam insulation is a better choice. Insulating a cathedral ceiling with foam it green.

Foam it green spray foam bonds overhead. Closed cell foam ceiling insulation in a vaulted ceiling offers substantial advantages over open cell. High density urethane spray foam provides an airtight seal and high r values making it a good choice for unvented cathedral ceilings. May 30 2020 at 9 57 am.