drywall mud and plywood
Sort of in a quandry.
I'm patching a plaster wall that is about 3/8" plaster and brown coat over 3/8" drywall. (so, 3/4"). I was going to use 1/2" drywall over 1/4" plywood to patch.
My quandry is that the edge of the plywood meets with the edge of the 3/8" drywall under the plaster, so that my 1/2" drywall is proud of the edge. It's flush to the wall and the edge of the 1/2"drywall would get plenty of mud but it would seem to mostly be joining with the brown coat and plaster and not the 3/8" drywall. Hope that makes sense.
I was thinking of stacking 1/2" and 1/4" drywall or 2 layers of 3/8" drywall but the plywood is just a tad oversized which works good for me.
Anyway, will the bond be as strong using the plywood?
(Using EZ Sand and paper tape)
Here's some pics of what I'm trying to say.
just holding a piece there for demonstration.