Insulating A Cathedral Ceiling With Rigid Foam
Can i fill the rafter spaces with layers of rigid foam and spray can foam the seams and cracks of each layer as an air barrier and keep the roof unvented.
Insulating a cathedral ceiling with rigid foam. The right way to insulate attics and cathedral ceilings with batts using certain teed fiberglass insulation. We are building a tiny house currently with cathedral ceilings and 2x6 rafters. Im going to remove the shingles and i thought i would apply 2 inches of rigid foam on the outside with inch osb sheathing on top then 30 lb. Im going to finish my bonus room above the garage of my cape cod.
My initial plan to create the 1 air gap from the soffit to ridge vent was to use thin plywood nailed to 1x1 pieces of wood. Attic trusses typically have a sloping ceiling. Insulating cathedral ceilings with rigid foam. It fills and seals the space and doesnt absorb moisture.
Regular ceilings are likely to be under attics with either batt insulation between. Im in the early stages of building an amazing workshop to showcase tools over at tool box buzz and shop projects here at hci. I have access to large quantities of rigid foam and would like to make use of it. I plan on having the assembly vented.
Opted for insulating it by injecting polyurethane foam into the ceiling cavity. The materials expand and harden in place forming the insulation layer. Solve moisture and rot problems in insulated cathedral ceilings with closed cell foam ceiling insulation. Shelly lighting october 6 2018.
Drawing detail as insulation details. Injecting polyurethane foam into existing cathedral ceilings. I would then like to add another layer of rigid under the rafters with taped. This is a seasonal room that im going to heat on different occasions.
Any insight would be appreciated. After painstakingly insulating our walls chris to turned his attention to something even harder insulating the vaulted ceiling. Energy saver team used the same kind of. By the time he is through with the retrofit our ceiling will have 10 distinct layers and be 17 inches thick.
Exterior roof insulation retrofit cathedral ceiling rigid foam credit to. The new workshop will be located over my garage in an area that was framed using attic trusses when we built the new house. Insulating cathedral ceilings with rigid foam. Im trying to determine the most cost effective way of insulating the 2x6 roofline in the bedrooms.
I have an exposed 2x6 tongue and groove ceiling with 4x12 rafters. This video covers how ceilings and attics require higher r values because of the range.
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