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 ...

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.

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 ...

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 ...