Insulation Crawl Space Floor Joists

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

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. If vents are not present in your crawl space insulate the walls instead of the joist bays. The sill plate is the first piece of framing lumber and it runs on top of the crawl space wall. Cover the walls with insulation from the sill plate to the plastic covered dirt floor.

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. Floor insulation for moderate climes popular reads. Joist bays the open spaces between floor joists are prime hosts for insulation under specific circumstances. Where winter temperatures are extreme opt for insulating the walls and sealing off the crawl space entirely.

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.