Tile over wood/joist to concrete slab transition
Is there an acceptable way to tile a floor that is half plywood over joists and half concrete slab? The top of the plywood is currently flush with the slab.
Method A: Use concrete underlayment across the entire floor, using screw fasteners on the wood joists, and combination of thinset and TapCons on the slab portion.
Method B: Use 1/2" (treated?) plywood across entire floor. (Using screws on joists and TapCons on concrete)
With either method, I do plan to use a DITRA mat.
As an added complication, I had planned to install radiant heat (using the SLC and edge strips method to cover the wiring before putting down the DITRA.)
Any advice would be appreciated. Thanks!!