Dick,
Where did you get those ideas? All wrong! :yes:
If your "original" t&g floor is the subfloor, you can leave it, but you must install a plywood underlayment over it first and then the CBU or a membrane such as Ditra. If you go with the cement backer (CBU), it is installed into thinset mortar and immediately fastened and then taped per directions.
Jaz
Where did you get those ideas? All wrong! :yes:
If your "original" t&g floor is the subfloor, you can leave it, but you must install a plywood underlayment over it first and then the CBU or a membrane such as Ditra. If you go with the cement backer (CBU), it is installed into thinset mortar and immediately fastened and then taped per directions.
Jaz