Insulating Crawl Space Floor

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.

Insulating crawl space floor. Enclosing your crawl space. Use an insulation that resists damage from water not fiberglass or cellulose. The cold climate choice.

You may also choose to lay an insulating mat over the crawl space floor. Department of energy recommends r 11 3 insulation under floors in warm climates and an r 25 6 to 8 in cold climates. How to insulate a crawl space with a dirt floor holding back moisture.

Materials expanded polystyrene foam board construction adhesive latex adhesive for foam board silicone caulk 6 mil minimum thickness clear polyethylene plastic double sided butyl tape poly pvc tape foam insulation. Unless there are excessive moisture problems in the crawl space use unfaced fiberglass batts to insulate the walls. This type of insulation allows for conditioned air to be introduced into the crawl space.

Vents present in some crawl spaces are intended to provide air circulation that removes odors and. Be sure to wear a long sleeved shirt gloves eye protection and a dust mask when handling the itchy stuff. You could also use batt insulation but don t.

Any one of the rigid board insulations will. 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.

In a cold climate the most efficient technique is to insulate the walls of your crawl space and close it off from the elements by sealing all air leaks. However the insulation needs to be treated with a fire retardant. Insulating a vented crawl space if you would like to keep your crawl space vented because you live in a low humidity environment we recommend insulating the crawl space floor with fiberglass or rock wool mixed with spray foam for air sealing.