Spray foam as sound barrier ?
Gathering bids on new construction over/under duplex. One builder says spray foam between levels for sound barrier. Will that just transfer thunking of footsteps through joists and ceiling of lower level more?
Gathering bids on new construction over/under duplex. One builder says spray foam between levels for sound barrier. Will that just transfer thunking of footsteps through joists and ceiling of lower level more?