Cellulose over 1/2″ drywall and 24″ o.c. furring strips
I want to put between R30-R40 cellulose insulation over my poorly performing loose fill fiberglass. I am concerned about the weight of cellulose and sagging, and to be on the safe side I am considering two ways to mitigate that: one, I put more furring strips (the drywall is attached to strips, not joists) and attach them to the joists using angle brackets. My reasoning is that they should help absorb some of the weight of cellulose. The other one would be to put Great Stuff Pro Wall & Floor adhesive between the drywall and joists, hoping that it will help the drywall support the weight. I know that materials are usually pressed to make a solid bond, but I am wondering if just squeezing adhesive under the joists will make a strong enough bond for my purpose.
Is the Great Stuff idea feasible?
Thank you so much for your help!
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