How do I keep cold air out of my crawl space?

Plug Holes



Seal around pipes, wires and vents that penetrate through holes in the crawl space ceiling into the living spaces above. Use caulk or expanding foam sealant as appropriate. Apply weatherstripping to hatchways or trap doors that provide entrance to crawl spaces to stop cold air infiltration.

What kind of insulation is best for crawl space?





foam based

The Building Science Corporation recommends a foam based insulation as the best insulation for crawl spaces because it creates an air barrier. This means spray foam is the best floor insulation so you won’t need to wear extra pairs of socks.

How do you install insulation in a crawl space?

Install the insulation with the paper vapor barrier facing up toward the heated living space, and make sure the insulation fits tightly between the joists. Hold the insulation in place from below using insulation support wires, or by stapling chicken wire to the bottom of the joists.

How do you insulate a crawl space with a dirt floor?

Quote from the video:
Quote from Youtube video: If you have a wet crawl space floor you could go with perhaps the foam board like our r10 termite resistant foam board or something like that.

How much heat is lost through a crawl space?





This results in approximately 0.4 quads (3.9 x 1026 J) of energy being lost through uninsulated crawl spaces and basements.

Should you insulate a crawl space ceiling?

It is important to secure insulation and cover it with a vapor barrier in order to prevent moisture and the mold that often follows close behind. If your crawl space isn’t ventilated, insulate the walls of the crawl space rather than the subfloor of the room above.

Should you use faced or unfaced insulation in a crawl space?

It is recommended that you use faced insulation in a crawl space since it has a moisture barrier that keeps the moisture from seeping into the air beneath your home. However, if you are adding another layer of insulation to meet the stipulated R-value, it is advisable to use unfaced insulation.