Two types of spray foam insulation that can be installed.
Open cell and closed cell foam.
A major difference in between the two types comes down to the total R-value achieved – the R-value rating assigned to material that identifies resistance to heat flow. The higher the R-value, the more heat resistance you receive.
Open cell foam is less dense, comprised of free-flowing air within the spaces where the foam cells have not formed and interlocked. Closed cell foam is far denser, so it is not porous in its composition. The air is therefore trapped inside, as the foam’s cells bind closer together to make a tighter, water-resistant layer, it takes more of such foam to fill the same space that it would take the open cell foam to occupy.
Both can be very effective inside a home or building, however closed cell foams are functionally superior when exposed to weather elements outside.
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