I have a 16x16 space which is being turned into a music studio. Double hung sheetrock, resilient channels, rock-wool insulation in the walls, ect.
The challenge I'm having is with the flooring. Carpet & pad will go over whatever I end up using, but that alone does not cut sound signifigantly.
I learned that gypsum concrete over a rubber pad underlayment is the best way to seal off the floor (from sound). Got a couple quotes and quickly learned that this solution is for the very wealthy only. Appears that you cannot buy gypsum mix anywhere. The industry tightly controls access to the material, which is installed through licensed contractors only. Simple supply and demand.. choke off supply and raise the price.
Are there other flooring solutions, similar to gypsum? The benefit with gypsum is that you don't need control joints.. it actually expands when it sets, so you have a completely sealed off floor (to the sheetrock walls).
Other self-leveling flooring products are based on portland cement which contracts.
Has anyone else come up with a proven method to seal off flooring for acoustical performance?