Insulation Crawl Space Floor Joists

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.

Insulation crawl space floor joists.

Where winter temperatures are extreme opt for insulating the walls and sealing off the crawl space entirely. When the basement or crawl space has vents installed insulating joist bays. Cover the walls with insulation from the sill plate to the plastic covered dirt floor. Floor insulation for moderate climes popular reads.

The sill plate is the first piece of framing lumber and it runs on top of the crawl space wall. If vents are not present in your crawl space insulate the walls instead of the joist bays. In those days common building practice was to insulate the floor above the crawl space and to leave the crawl space s wall vents open so any moisture buildup would vent to the outside a. Department of energy recommends r 11 3 insulation under floors in warm climates and an r 25 6 to 8 in cold climates.

Fiberglass insulation batts or rolls are the most economical and easiest diy choice for insulating between the floor joist in a crawl space.