Originally Posted by
BentoSan
That foam your talking about is for treating a rooms acoustics and NOT soundproofing - the foam will do very very very very very little (to nothing at all) about stopping the sound from escaping the room.
If the basement is truely a basement in the sense that the whole thing is underground you don't have to worry about treating the walls as the sand around the house is going to do a fab job of stopping the sound. You will however want to use a couple thick layers of soundproofing gyprock on the ceiling to stop the sound going through the house and escaping out that way.
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