DIYer struggling with old backer board removal
My kids bathroom remodel was going great till I started to remove the tile. The rotary drill is removing the tile easily, but I'm having trouble with what is below. I can get off the brittle backer board little by little, but there's a blue thin membrane on the bottom that I can't remove without damaging the plywood subfloor. It seems glued on completely.
Anyone had experience with this? Can thinset bond to this old membrane if I leave it? Any help would be awesome.
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I wish I had an exact answer for you. I don't. But I have anecdotes.
We've tiled over existing tile, so long as it's bonded well. If you are having issues removing it, maybe bonding primer and self leveler to flatten it? Then some ditra?
My point is that if it is bonded that well, chances are it is not going to move under your tile assembly.