Rigid Foam Insulation Crawl Space Floor

You may also choose to lay an insulating mat over the crawl space floor.
Rigid foam insulation crawl space floor. A temperate lower area that will keep upper floors warm while your home s foundation remains in sound condition. Get free shipping on qualified crawlspace foam board insulation or buy online pick up in store today in the building materials department. Rigid boards may be installed with construction adhesive or mechanical fasteners. The advantages are multiple.
Glue rigid foam insulation board to the inside of foundation walls using waterproof construction adhesive and seal all seams with waterproof tape. R 3 2 polyisocyanurate rigid foam insulation board model 754404 13 82 13 82. The best insulation material for crawl spaces is rigid foam insulation board. Unlike fiberglass rigid foam insulation does not absorb water support mold or allow air to pass through.
R 6 polyisocyanurate rigid foam insulation board model 787264 21 78 21 78. 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. Floor 1 garage 6 metal building 1 re siding 4 under slab 2 more ways to filter. Thermasheath rmax thermasheath 3 1 in.
Avoid putting kraft paper backed insulation against the walls where trapping moisture could present mold and mildew problems between the walls and the insulation. A 4 by 8 foot sheet of 2 inch thick expanded polystyrene insulation r value 7 7 is 26. Floor 31 garage 6 metal building 1 re siding 4 under slab 2 more ways to filter. Use an insulation that resists damage.
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. Floors running atop will feel warmer to bare feet in the winter. Cement 25 concrete 24. Rockwool comfortboard 80 according to the manufacturer is non combustible and chemically inert and it s made from natural and recycled materials including rock.
Adding rigid foam insulation to your crawl space is one of the smartest things you can do to your house.