Can I install drywall over old plaster?
Instead of removing the old plaster ceiling and walls, I would like to add drywall over top to save time, money and headache. Is this acceptable practice? If so, should I install a sheet of vapour barrier between the new and old ceilings/walls since there isn't any. Would I install strapping to the ceiling/walls first? I have read that you can use nail glue on the walls and then follow up with the drywall screws where there are studs.
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