Spray Foam Vs Batt Insulation Basement

This barrier stops air and moisture from entering one environment to the other indoors to outdoors outdoors to indoors.

Spray foam vs batt insulation basement.

It is made from fiberglass strands that create a barrier for air flow. Basement spray foam insulation pros. Insulating your basement with roxul or other rock wool batt is a good option this type of batt withstands moisture problems that result in sagging in fiberglass insulation. It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass.

For instance a 5 5 inch wall cavity can be filled with 2 inches of foam and an r 13 fiberglass batt as a cost effective system that seals the walls with an r 25 insulation system exceeding u s. Batt insulation is that pink fiberglass found in exterior walls attic floors and the crawlspace ceiling. Spray foam creates an air barrier that will seal up your basement to stop the outside air from getting in. Thermal bridging means cold air conducted along the structure from the outside to inside.

A better option in addition to the roxul is to first use spray foam in all of the headers of your basement this deals with air infiltration and thermal bridging. Learn more about spray foam. A poly plastic layer and sealing is needed to provide an air vapour barrier. Unlike spray foam insulation that acts on its own fiberglass batt insulation and poly plastic require one another for the system to be effective.

If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary. Spray foam insulation is designed to fill all of the nooks and crannies wherever it is applied including your basement. Spray foam insulation has less market share but is increasing in popularity. Spray foam can be used almost anywhere in the home including exterior walls ceilings floors attics and basements.

I d blow insulation on the attic floor after air sealing of course. Spray foam insulation doesn t retain water so it also doesn t promote mold.