Double sheetrock + green glue + Membrane
I am going to be using mineral wool, a certainteed membrane, and possibly 2 layers of sheetrock (1/2″ or 5/8″) with green glue between them. Is there going to be any problem with this design in terms of the membrane’s performance? I don’t want moisture problems by using 2 layers of sheetrock + the green glue.
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Green Glue between layers of drywall is used for sound suppression. Is that the application here? Is the drywall going in above or below grade? Are the walls interior, exterior, and a combination of both?
Ralph,
Two layers of drywall with glue between them won't be a problem.
-- Martin Holladay