Insulation Under Floor In Crawl Space

If your house has a crawl space foundation there are some very basic symptoms of poor crawl space insulation.

Insulation under floor in crawl space.

A crawl space is the hollow area under the floors of some houses between the ground and the first floor. When insulation is installed it is most commonly found between the floor joists to prevent the crawl space air from entering through the floors above. Fiberglass insulation batts or rolls are the most economical and easiest diy choice for insulating between the floor joist in a crawl space. If the crawl space is ventilated which is ideal because it aids in the elimination of moisture then fiberglass insulation can be easily installed under the subfloor between the floor joists.

During chilly winter months floor areas above the crawl space will be cold and uncomfortable to walk on barefoot or in just socks. Department of energy recommends r 11 3 insulation under floors in warm climates and an r 25 6 to 8 in cold climates. Cold floors are a key sign of an under insulated crawl space. Crawl spaces elevate houses from the ground and provide an area to contain important home elements such as air conditioning and heating units duct work plumbing electrical wiring and insulation.

Fiberglass insulation batts or rolls are the most economical and easiest choice for insulating between the floor joist in a crawl space. It s generally 1 3 feet high and is usually accessed as the name implies by crawling. That way warm air is circulating under your floors warming them up and helping to keep you toasty. If you don t your crawl space becomes a petri dish with crawl space sealed off from cold and moisture your crawl space can be linked to your household hvac system via vents.

Cold air that sweeps through a crawl space meanwhile can lead to cold floors inside the home whether or not the space is wet. Insulation of foundation wall and floors above many crawl spaces are built without any insulation in them. The department of energy recommends r 11 3 insulation under floors in warm climates and an r 25 6 to 8 in cold climates.