who knows about spray foam?
is all spray foam the same or is there any differences other then open or closed cell versions?
I get the sales pitches saying "mine is best, don't trust what others use" and something like "some brands don't insulate or hold up as well as others" but its hard to know if its salesman BS or not.
does anyone know enough about this stuff to say one way or the other if its all the same or not?
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