Crawl Space Floor Joist Insulation

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.

Crawl space floor joist insulation. Where winter temperatures are extreme opt for insulating the walls and sealing off the crawl space entirely. Insulating and air sealing this perimeter zone is important because it s a major source of air infiltration and conductive heat loss. Silverglo rigid foam insulation won t absorb water or support mold growth and does not allow air infiltration making it the perfect insulation product for use on crawl space walls. Instead install fiberglass batting between the joist bays which are the spaces between each set of 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. Don t compress the insulation as it requires its loft in order to maintain its rated r value. If your space has them avoid adding insulation to the crawl space walls. This type of insulation allows for conditioned air to be introduced into the crawl space.

Crawl space insulation basics. Stapling fiberglass batts between joists to the underside of your home s floor presents a number of problems. Floor insulation for moderate climes popular reads. However the insulation needs to be treated with a fire retardant.