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 ...

Knowing what sort of insulation to use ... Typical R-value: 3.1 to 3.8 per inch of thickness. Where commonly used: Attics and wall cavities. Pros: Foam board, aka rigid foam, is made from ...

The amount of foam it takes to insulate a 2×4 wall is considerably ... costing between $1 and $1.50 per board foot. Do keep in mind that closed-cell spray foam insulation is a better insulator ...