Attic Insulation Closed Cell Foam

Closed cell foam can also increase the racking.

Attic insulation closed cell foam.

Because it requires professional installation closed cell foam insulation is pricey but it offers r 6 thermal value for every inch of thickness. R tech is available with factory adhered metallic reflective facers white facers or a combination of the two. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. But some closed cell foams like tiger foam s e84 closed cell formula have even higher ratings that go up to almost 7 per inch.

Closed cell foam can be over three times that with a density of 1 75 pounds per cubic foot or more. Insulating value and strength open cell foam has an r value of about 3 5 to 3 7 per inch while closed cell foam has an r value of about 6 per inch. There is 300 difference there but the cost they give you is about a third difference and open cell foam at 12 inches will not give you the performance of 2 inches of closed. We live in minneapolis so we really care about that.

Closed cell foam can also add to the structural strength of the roof system which can make it a more appealing choice in locations that frequently endure high winds. R tech panels are an engineered rigid insulation consisting of a superior closed cell lightweight and resilient expanded polystyrene eps with advanced polymeric laminate facers. It is the best for mold prevention. This can result all if your spray polyurethane foam insulation gets botched by someone who simply doesn t understand the science of proper application.

Whereas blown in insulation works by filling the. R tech rigid foam insulation. Closed cell spray foam r values why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts. Intumescent coatings are not always needed to coat spray foam in the attic in order to meet code thermal barrier requirements.

Closed cell foam has a higher r value than open cell foam usually about 6 0 per inch. I m not going to dive into the energy code here but these numbers apply to many climate zones the latter being allowed under the ua tradeoffs rule. The american lung association also recommends it for a different reason. Our builders encouraged closed cell spray foam as it is the best r factor per inch of insulation.

Open cell foam weighs 1 2 pound per cubic foot and closed cell weighs 2 lbs per cubic foot. In the worst cases homeowners have been plagued by horrible smells that could only be addressed by painstaking and expensive removal of the foam they d already paid good money for.