Components which can be used as a spray foam thermal barrier are drywall and plywood. Gypsum board is another thermal barrier as It is just a drywall substance that has a hearth retardant built-in. There exists also DC-315 paint that's sprayed right on to the foam insulation at a https://blackheadremoval00986.total-blog.com/little-known-facts-about-decibel-reduction-59985668