Rigid Foam Insulation Crawl Space Floor

Adding rigid foam insulation to your crawl space is one of the smartest things you can do to your house.

Rigid foam insulation crawl space floor.

A 4 by 8 foot sheet of 2 inch thick expanded polystyrene insulation r value 7 7 is 26. R 3 2 polyisocyanurate rigid foam insulation board model 754404 13 82 13 82. Unlike fiberglass rigid foam insulation does not absorb water support mold or allow air to pass through. Proper crawl space insulation also can prevent your crawl space from becoming a moist environment that grows and harbors mold and mildew controlling crawl space temperature and moisture is a dual process that works toward a common goal.

Get free shipping on qualified crawlspace foam board insulation or buy online pick up in store today in the building materials department. The best insulation material for crawl spaces is rigid foam insulation board. A temperate lower area that will keep upper floors warm while your home s foundation remains in sound condition. To insulate the crawl space walls chappell dick wonders whether rockwool comfortboard 80 a rigid mineral wool insulation would make a good substitute for rigid foam.

Use an insulation that resists damage. Glue rigid foam insulation board to the inside of foundation walls using waterproof construction adhesive and seal all seams with waterproof tape. Avoid putting kraft paper backed insulation against the walls where trapping moisture could present mold and mildew problems between the walls and the insulation. Unvented crawl spaces are suitable for unfaced fiberglass batting batting with special backing or encapsulation material designed for foundation walls and rigid foam insulation board.

This is especially true if the joints between the boards are sealed with tape. You may also choose to lay an insulating mat over the crawl space floor. Rockwool comfortboard 80 according to the manufacturer is non combustible and chemically inert and it s made from natural and recycled materials including rock. Floor 1 garage 6 metal building 1 re siding 4 under slab 2 more ways to filter.

Instead of installing foam insulation between floor joists in a crawl space the foam board can be installed against the crawl space foundation walls. The advantages are multiple. Unlike fiberglass rigid foam insulation does not absorb water support mold or allow air to pass through.