skyking1
Thinks s/he gets paid by the post
That might be the whole issue then. 24" is not good for tile with 3/4 anything.ERD,
I'm not there yet, but I previously repaired some flooring issues by my slider door before having wood floors installed.
I think it is 3/4" plywood in questionable condition. Built in 1984. I'm going to add more deck screws, and replace any damaged or delaminated plywood.
I could decide to add. 1/4" layer on top, or even replace all of it once I remove the tile.
The trusses are further apart than 16". I suspect 24" spacing.
Right now my plan is to screw down cement board.
Thanks for your comments.
I'd use 1/2" plywood glued screwed down with the joints and orientation mixed, and then the Ditra uncoupler.