Spray Foam Insulation for Soundproofing
I’m making lots of progress (hopefully in the right direction) on the gut rehab of my 4500 sq ft 3 story house. Envelope will all be closed cell spray foam (walls, roof rafters, basement walls).
Now I’m wondering about insulation in the interior walls and between floors.
I was all set on not insulating between floors to allow for air and heat energy to flow (which I understand is quite complicated and not necessarily a desired thing).
Then my wife and I were talking about keeping sound/noise from transferring between floors and between interior walls.
I’m wondering what everyone here thinks about open cell spray foam between floor joists (between floors 1 & 2 and floors 2 & 3) to keep the noise down, and/or in the wood 2×4 interior walls?
I understand enough (albeit very little) to know that OC SF between wall studs won’t be a super-duper effective noise control, but from what I read it would be a huge improvement over nothing in the wall as well as a huge improvement over simply double sheetrocking and/or fiberglass batting (right?)
I’ve 99% sure I’m going with an LG heat pump with separate air handlers for each floor and all tied into a central ERV.
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