Is a layer of spray foam a good idea before installing blown attic insulation?
A layer of 2lbs spray foam is a great idea before installing blown insulation into an attic. Spray foam to the attic deck provides the following;
- A seamless blanket of air barrier protection
- Seals all cracks and gaps that potentially leak moisture into the attic
- Provides a vapor barrier
- Stiffens and hold plaster ceiling together; more durable