Insulating The Floor Crawl Space

Stapling fiberglass batts between joists to the underside of your home s floor presents a number of problems.

Insulating the floor crawl space.

Crawl space insulation as a part of overall home air sealing and insulation helps maintain your entire home s energy efficiency without insulation heat and cool air are easily lost through the floor. A crawl space is an unfinished accessible area below the ground floor of a building. Where winter temperatures are extreme opt for insulating the walls and sealing off the crawl space entirely. Be sure to.

The crawl space is actually dirt floor. Floor insulation for moderate climes popular reads. To take the chill out of a crawl space it s usually best to insulate the exterior masonry walls rather than the underside of the floor above. In moderate or dry climates without the threat of sustained subfreezing temperatures insulation between floor joists makes sense.

Crawl space insulation basics. 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. While this method does work in the very short term moisture eventually builds in the crawl space and grows on this highly porous surface. Insulation also helps to preserve the air quality and reduce energy costs.

Unless there are excessive moisture problems in the crawl space use unfaced fiberglass batts to insulate the walls. When you re using fiberglass batting insulation material run it about 6 inches or so onto the crawl space floor. Cut pieces of insulation just large enough to fit along the rim joist the framing material into which all the floor joists are nailed. That s especially true when heating ducts or pipes pass through the space.