How To Insulate Floor In Crawl Space
The best choice when it comes to installing insulation between the floor joists in a crawl space is fiberglass batts or rolls.
How to insulate floor in crawl space. If both floors of the house are heated use unfaced insulation. The idea is to condition the crawl space much in the same way that you might condition other parts of your home. Use caulk or foam sealant to seal the joint between the top.
Unless there are excessive moisture problems in the crawl space use unfaced fiberglass batts to insulate the walls. That s especially true when heating ducts or pipes pass through the space. Fiberglass insulation batts or rolls are the most economical and easiest diy choice for insulating between the floor joist in a crawl space.
Whether the crawl space has vents or not moisture is the first problem to limit. Add a vapor barrier. Department of energy recommends r 11 3 insulation under floors in warm climates and an r 25 6 to 8 in cold climates.
This insulation material is economical and the easiest for do it yourself diy installation. Vents present in some crawl spaces are intended to provide air circulation that removes odors and. 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.
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. Hold the insulation in place using support wires beneath it. Instead a better method is the multi pronged approach of insulating the inside walls of the crawl space with rigid foam laying down a plastic vapor barrier over the dirt floor then joining the two items with tape.
Cut to length if needed using wire cutters. 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. Fill the ends of joist bays with rectangles cut from rigid board insulation.