Cons: Foam board insulation can be harder to install snugly in unusually shaped spaces, leaving gaps for air to flow. To create an effective air and moisture seal, you need to tape all seams ...

If you don’t want to take down the ceiling, you can add rigid foam board insulation above the roof sheathing. But that means taking off the roofing and then installing a new roof. If you need a ...

Rigid foam boards used to insulate buildings can prevent ... opens avenues to develop safer composite foams for a variety of insulation systems," said ORNL's Tolga Aytug. The paper is published ...