In the middle of a bathroom re-model and at the point of replacing the floor.
Removed the existing vinyl tile from the floor and a bit confused about what is underneath. Not sure what is needed for it to support ceramic tile. Specifically, this mosaic tile.
This is what the subfloor looks like after the vinyl removal.
It's difficult to determine the type of wood. There is either a membrane/underlayment or sealant of some kind that stayed on the floor after the vinyl was removed. There's only a few spots peaking through.
I'm hesitant to pry off this "membrane" in case this material might help in installing the ceramic on the subfloor without requiring another underlayment like Ditra, Easymat or backerboard.
There is very little extra space between the exterior floor and the bathroom that raising it with any of those options will add too much of a height disparity.
My questions are:
- What is the wood used and the "membrane" on top?
- Can I install tile on top (with thinset) or is an additional underlayment required?
- If it's required, can something like Redgard or self-levelling cement be used to keep the height increase to an absolute minimum?
This is my first time doing any flooring so I appreciate the help. Thanks!