An insulated basement or crawl space provides many benefits year-round, and the rim joist (or band joist) is often a focal point in energy-saving initiatives. Installing insulation at the rim ...

Q: Should we insulate the rim-joist cavities of a crawlspace foundation? I am a builder, and where I live the codes require insulation, but I have discovered that the insulation ...

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 ...

Q. What are rim joists, and how do you insulate them? Our home was recently inspected and the buyer asked that we pay for the repairs. Is this something I can do myself? A. Rim joists are the ...

Q: I have a crawlspace under my house. Last fall, I put insulation between the joists of one room to try to warm the floor somewhat. I put roll insulation between joists and nailed 4-by-8 ½-inch ...

Some builders refuse to insulate rim joists because of moisture problems, which lead to mold and decay. When a newly constructed home's crawlspace is fully enclosed and sealed, a lot of moisture ...

Some builders refuse to insulate rim joists because of moisture problems, which lead to mold and decay. When a newly constructed home's crawlspace is fully enclosed and sealed, a lot of moisture ...

Question: Should we insulate the rim-joist cavities of a crawlspace foundation I am a builder, and where I live the codes require insulation, but I have discovered that the insulation ...

Question: What are rim joists, and how do you insulate them? Our home was recently inspected and the buyer asked that we pay for the repairs. Is this something I ...

Rigid foam is the best insulation for rim joists. We chose 2-in.-thick (R-10) "extruded polystyrene." Don’t use "expanded polystyrene," which is a less effective air and moisture barrier.