Foil-faced foam board insulation (polyisocyanurate ... rigid foam is not fully waterproof. It's best to use higher-density rigid foam for homes in wet areas with more moisture.

A board foot is 144 cubic inches. With this unit as the standard to go by, open cell spray foam insulation costs between $0.45 and $0.65 per board foot. Closed-cell spray foam is more expensive ...

However, if you use a rigid foam board that has a vapor barrier of some kind on the outside, this can cause problems because you’ll be sandwiching the insulation between two vapor barriers ...

x 8 ft. polystyrene foam board with an R-value of about for will run you around $14. Radiant barriers, also known as reflective barriers, are different from most other types of insulation ...

While this isn’t waterproof insulation ... option when paired with another insulating material like foam board or blanket ...

Plywood and particle board ... foam boards weigh 30 to 60% less than the same sized plywood sheet. They are also stronger than similarly sized plywood boards. Durability: The foam boards are ...