Rebuilding an outdoor deck in upstate NY with 6" X 24" porcelain tile. The foundation will be a 6" concrete bed with rebar. Confused about the need for and the order in which the following should be used:
🔹Uncoupling Membrane (e.g.: Schluter Ditra)
🔹Redgard
🔹Cement Backer Board
🔹Thin set mortar
Have no issue with the expense of using all of the above in order to maximize the life and stability of the deck.
Thanks in advance for any advice you might offer.
Best Answer
I have tiled a few concrete slabs and have never used anything but thinset, a membrane for a shower stall is great but for outside I believe it could have more problems than straight thinset, if you want to make it stronger add add mix or purchase thinset that is already enriched. Absolutely no need for a backer board on a concrete pad.