Help? Do I just lay new thinset on top or what?
That's what a friend and I did when we couldn't get the old thinset up off his kitchen floor. We just laid down some more thinset so the floor was level all the way across.
i've got laid some tile, flooring,showers, and a pair tables(greater of the mosaic form). i'm exceedingly beneficial which you're able to desire to apply hardibacker(cement board) purely for showers or kitchen/tub flooring. it somewhat is substantial objective is to evade any air /moisture from seeping up with the aid of the backside ,for this reason inflicting the tiles to interrupt. Hardibacker helps seal all that out. yet i do no longer think of it somewhat is mandatory on your project. you will no longer could difficulty approximately spilled drinks after your table is cured and sealed. The grout is what keeps something from getting below your tiles. be certain you wait a minimum of 24 hours earlier sealing your new tile activity. perhaps look into a tile e book from the library or seem up How-to do -it your self form of web sites for education. stable success!
You have a few options. Best remove all the old board and start again or to hand scrape the old thin set off but it is a lot of work. If the old thin set is fairly flat and no big gaps when thin set came up with tiles, then you can sweep the area well ( use a power-full shop vac) and smooth coat thin set between the ridges of the old trowel marks and let dry for a few days. If you have lots of big gaps, you may need to pour a self leveling compound over the whole area to make it flat again. This isn t hard, just messy if not done right. Any questions you can e mail me through my avatar and check my qualifications there. GL.
