Open Cell Foam Vs Closed Cell Foam In Attic

Open cell foam has tiny cells which are not completely closed.

Open cell foam vs closed cell foam in attic.

To support traffic and loads better. Most open cell foam has a density of about 5 pounds per cubic foot. Closed cell foam can be over three times that with a density of 1 75 pounds per cubic foot or more. Closed cell foam has cells which are sealed off so air doesn t get inside the structure at all.

Open cell foam is just that open cell. The higher the density the foam the heavier or stronger it becomes. Chemical manufacturer s claim if a roof leaks water will migrate through the foam structure therefore not trapping the water. Closed cell is denser better insulating.

With the open cell below right vs. The open cells are filled with air and this affects the way the foam feels and performs. Open cell is more susceptible to mold and mildew but its expanding so it can hermetically seal an area. Closed cell foam for insulation applications range in density from 1 7 lb cu.

Closed cell below left issue there are two major factors to understand and consider. 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 foam has a higher r value than open cell foam usually about 6 0 per inch. Let s not confuse open cell vs closed cell foam.

Roofing applications typically use a 2 8 to 3 0 lb cu. A foams r value is its resistance to heat flow or in other words how well they insulate. Seems like you wouldnt want to seal something susceptible to mold growth but maybe thats just me. Closed cell foam can also increase the racking strength of attic walls which.

They are broken and air fills all of the open space inside the material. It is either open cell foam where the tiny cells of the foam are not completely closed. Open cell foams typically weigh in at 0 4 to 0 5 lb cu.