Underlayment for floor in prep for porcelain tile
Just wondering for those who have installed ceramic/porcelain tile in the bathrooms what underlayment you used.
Our existing bathrooms have lino and then K3 board (particle board underneath.
I've heard many different ways and most popular is to remove the lino and K3 board and screw down plywood and then thinset and tile.
Then I've been told by some tile shops that wonderboard is fine on top of your subfloor after K3 has been removed. Again, thinset over wonderboard and then tile.
How thick of a substrate do I need before installing tile? 3/8 or 1/2" ?
Thanks