Jadnashua
Retired Defense Industry Engineer xxx
None of the above:
- no tile on top of a hardwood; the hardwood changes shape too much with the seasons - the hardwood should come out entirely. You don't want to install tile on top of planks, either...you want a layer of plywood on top of them.
- unless you want the height, 1/2" cbu is a waste on the floor; 1/4" is fine
- a mudbed over wood needs to be nominally 1-1/4" thick...1/2" is WAY too thin
A membrane like Ditra is much easier to install than cbu and gives better isolation than cbu.
- no tile on top of a hardwood; the hardwood changes shape too much with the seasons - the hardwood should come out entirely. You don't want to install tile on top of planks, either...you want a layer of plywood on top of them.
- unless you want the height, 1/2" cbu is a waste on the floor; 1/4" is fine
- a mudbed over wood needs to be nominally 1-1/4" thick...1/2" is WAY too thin
A membrane like Ditra is much easier to install than cbu and gives better isolation than cbu.