I am currently getting a bathroom remodeled. The ceramic tile is laid with thinset on top of three layers of 3/4" plywood. The previous tile floor we removed was a wiremesh-cement base of about 1-1/2" or so. Looking at other sources, there is this thing called backerboard for tiling.
Should I approach the tiler and GC regarding this? Or is there no real issue here?
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