Foam board insulation is easy to use and a great DIY way to add some insulation. It comes in standard-size 4×8 sheets and smaller sizes, in thicknesses from 1/4-in. to two inches. Some types of ...

Q: I have a room with a crawlspace under it about 20 inches high. The room has 12-inch floor joists, with rolled batt insulation. I’d like to insulate the block walls to reduce the amount of ...

Next, glue 1 1/2 or 2 inch expanded polystyrene foam board to the foundation walls inside the crawlspace, using tape or spray foam to seal the joints between pieces.

Polyiso is a closed-cell, rigid foam board insulation that typically comes in 1, 2, and 4 inch thickness. THERMAX™ and Dow “blue board” are the two most common types of polyiso insulation.

The average cost of foam board insulation is between $2.40 and $3.75 per square foot. Spray Foam Spray foam insulation, like blown-in, is great for adding insulation to existing finished areas and ...

When floor joists are installed, a board, either a 2×10 or a 1×10, is nailed across the ends of the floor joists to support them in an upright position until the sub-flooring can be installed.

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, costing between $1 and $1.50 per ...

Like rigid foam insulation, the standard thermal barrier is 1/2" gypsum board, but in some cases—like in attic insulation—an ignition barrier like 1/4" wood or 3/8" gypsum board is necessary.

Built in the 1840s from barge board, Maria Lana’s Bywater cottage is a perfect example of New Orleans vernacular architecture. It also was less than comfortable during cold snaps.

Then they covered that with an open-cell foam board that’s 3/4-inch thick. It seemed the smart thing to do is tear all this off, and I started to do just that, but then I thought to ask you ...