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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Installing drywall over the old plaster will save both time an money and is perfectly acceptable. Strapping is not needed; you can place the drywall right over the plaster and screw into the joists and studs. Construction adhesive can be used on the walls the way that you have described. Adding a vapor barrier is probably not needed. There's no insulation and the house has been fine so far. In fact, the paint that you apply to the drywall is probably all the vapor barrier that you need.
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