In addition to installing the foam board on the underside of the roof deck you can attach it to the bottom edges of the rafters in the same manner you would hang drywall.
Insulating the underside of your roof.
An advantage of spray foam is it s quick whereas foam board needs to be cut and measured which can be a chore.
Use these questions to decide which.
Don t use spray foam to fix a roof leak.
These circumstances cause your heater and air conditioner to work overtime and your utility bills will spike.
If so fix that first.
When hvac equipment is in the attic insulation and.
At the same time the areas below the roof benefit from increased comfort both during the winter and the summer.
You can then install.
In some cases you won t be able to insulate the underside of the roof itself but rather the attic floor.
Insulating the underside of roofs making the case for the unvented attic assembly background.
Yes you can spray foam the underside of your roof.
If you re insulating the roof directly to insulate the roof itself you either use spray foam or retrofit with it with rigid foam board.
But the best solution is actually to insulate both the attic floor and the underside of the roof.
Do you already have a roof leak.
In this way you prevent the heat from the rooms below escaping to the attic rooms above.
An unvented attic differs from a conventional vented attic in that there is no direct venting of the attic.
In the winter your warm indoor air rises and will leave through the attic if it s not properly insulated.