Foam And Batt Insulation

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Foam and batt insulation.

Foam board insulation can add insulation and eliminate thermal bridging when used in wall and ceiling assemblies insulated with batts. It is made from fiberglass strands that create a barrier for air flow. It can help improve thermal performance but it does come with some difficulties. When you use foam it green closed cell spray foam for the first 50 of the r value and then use fiberglass or another low cost insulation to get the air barrier and high starting r value and then add in more r value.

Fiberglass devoured the insulation industry in the 1970s for obvious reasons. For example roll insulation suitable for 2 4 wall and ceiling cavities is about 0 35 to 0 40 per square foot. Here is a study done by the nahb air sealing. Spray foam insulation price starts at about 0 60 or 60 cents per board foot for diy open cell spf with a top cost of about 80 cents.

It is cheap simple to install if not easy to install well and readily available. Spray foam can be used almost anywhere in the home including exterior walls ceilings floors attics and basements. Batt insulation is that pink fiberglass found in exterior walls attic floors and the crawlspace ceiling. Closed cell spray foam insulation cost is 1 25 2 00 per board foot for the material diy.

Yes foam board insulation is an excellent complement to batt insulation. Some people can use just 1 inch of foam it green closed cell spray foam insulation and others need more. Fiberglass batt insulation is priced by the roll or by the square foot. Here are four reasons flash and batt can be a great insulation option.

Batt fiberglass has been used more extensively than spray foam throughout history and it still holds up as one of the most affordable and reliable options. Batt fiberglass features tightly woven glass strands that come together to create a matrix. Two inches of closed cell foam in a 2 inch by 4 inch wall can increase the racking strength more than 200. Foam board insulation is a great alternative to the very common fiberglass batt insulation that is in most of our homes.