Open Cell Foam Vs Closed Cell Foam In Attic

Closed cell foam is much denser than open cell foam. Closed cell foam can also increase the racking strength of attic walls which. Open cell foam is just that open cell.

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Roofing applications typically use a 2 8 to 3 0 lb cu.

Open cell foam vs closed cell foam in attic.

Open cell foam has tiny cells which are not completely closed. To support traffic and loads better. Open cell is more susceptible to mold and mildew but its expanding so it can hermetically seal an area. The first is the nature of the foam.

Closed cell foam can be over three times that with a density of 1 75 pounds per cubic foot or more. Id go with closed cell. Chemical manufacturer s claim if a roof leaks water will migrate through the foam structure therefore not trapping the water. Seems like you wouldnt want to seal something susceptible to mold growth but maybe thats just me.

Closed cell foam for insulation applications range in density from 1 7 lb cu. It is either open cell foam where the tiny cells of the foam are not completely closed. Most open cell foam has a density of about 5 pounds per cubic foot. 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.

Closed cell below left issue there are two major factors to understand and consider. With the open cell below right vs. Closed cell is denser better insulating. The higher the density the foam the heavier or stronger it becomes.

Closed cell foam has cells which are sealed off so air doesn t get inside the structure at all. They are broken and air fills all of the open space inside the material. Open cell foams typically weigh in at 0 4 to 0 5 lb cu. A foams r value is its resistance to heat flow or in other words how well they insulate.

Closed cell foam has a higher r value than open cell foam usually about 6 0 per inch. The open cells are filled with air and this affects the way the foam feels and performs. Let s not confuse open cell vs closed cell foam.

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