
Can I patch big drywall holes (removed shower tiles) w/ fiberglass tape & apply backerboard to patched drywall?
I removed 40 sq ft of old ceramic shower tiles from the wall and I plan to put up 50 sq ft of 3/4 inch Glass Mosaic Tiles in the shower. There are a significant number of holes in the drywall from when I removed the tiles. I don't know the first thing about drywalling so I'm wondering if I can just apply fiberglass tape and joint compound over the tape in the holed areas. Then I'd like to apply the cement backerboard, thin-set mortar, and mosaic tiles. Does this sound okay or do I have to knock out the old drywall and make new? Thanks!
you can as long as the holes are not huge just fill them and sand them smooth when dry.however i suggest you remove the old drywall and expose the framing and apply the cement board on to that directly if you go over the drywall you will have to concern yourself with hiding the edges of the cement board on the top and sides.and if any moisture gets between the drywall and cement board it will never dry out.
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