im retieling my bathroom floor some of the old cement board is coming but not all of it .Can i just put a layer of thin set over it and then build up where i did get the cement board off?
Sure - you could do a hole-patching with thinset - you might put in a little fiberglass mesh too. I can't imagine why that wouldn't work just fine.
Gotta damage it up, if you need it out. Why no longer duvet over it? In case you are dead set on elimination start on the top of wall wreck by means of to the wire. Begin slicing the wire and pulling it free from the wall.
If its 1/2 cement board you should use a better cement product than thin set. Thin set isn t meant to be used 1/2 thick. Couple of options.. Finish taking it out (PIA I know) , repair what you ve ripped out so far, or use thin set in two pours so it isn t as thick in one pore. Let it dry a couple (several) days. This allows all the moisture to leave and no other shrinkage will occur.. You still may have to do another smooth coat to make it flat.. Depends on how big this repair is.. Thin set, in a large area, loses its compression strength and will crumble over time.. No one can really say because you don t say the size of area to be done.. Any questions you can e mail me through my avatar and check my qualifications there. GL
