I am redoing my front porch.
It is approx. 8ft by 3ft.
I have put down 3/4in ply. with joists spaced at 14in, the short way.
I want to put down tile, what is my best way to waterproof the ply. before I lay the tile?
I have thought of using a membrane type of product.
Does what you lay have to have some roughness for the mortar to take.