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Hello all, and thanks for the great info here.
I am getting ready to install tile in a room that has 3/4" OSB over 16" OC joists. I have just over an inch of space unless I modify one of the doors. I am wondering if my best approach is to add 1/2 inch plywood (with adhesive and screws), then Ditra, then tile. The other alternative is backerboard then tile, but seems like the plywood plus Ditra would give me a stiffer subfloor.
The tile is 1/4" thick, 12x12. I am also wonder how much total space for Ditra with mortar above and below. I am assuming 1/4", but any guidance would be appreciated.
Finally, how hard is it to get the Ditra flat? This is a DIY job.