Open Cell Vs Closed Cell Foam Insulation Attic

Closed cell foam is much denser than open cell foam.

Open cell vs closed cell foam insulation attic.

Closed cell foam can be over three times that with a density of 1 75 pounds per cubic foot or more. Open cell foam is used in a wide range of applications such as for noise reduction in sound rooms home insulation metal buildings under roof deck for semi conditioned attics and more. Closed cell foam can also increase the racking. Not long ago someone even told me that in florida roofing companies won t let their workers go up on roofs with open cell spray foam because the roofs are so spongy the guys fall right through.

Spray foam insulation does not cause rot and can add structural integrity to areas like the basement or roof. 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. Some say use open that way you can see a leak before it does any damage others say use closed so any water damage should run off under your roof shingles. When applied on the interior open cell spray insulation provides performance advantages that differ from those of closed cell spray foam used on the exterior.

An overview of closed cell spray foam insulation closed cell spray foam insulation is highly efficient. Open cell foam insulation in my attic area. Open cell spray foam costs between 0 25 to 0 50 per board foot and closed cell spray foam ranges from 0 90 to 1 50 per board foot. Most open cell foam has a density of about 5 pounds per cubic foot.

Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while. Closed cell spray foam exterior applications. Closed cell insulation is completely waterproof and is not affected by water in any way. I am getting mixed advice about closed cell vs.

It rots roofs people have told me. Open cell insulation will not keep water out so moisture will pass through it but the insulation itself is not affected.