I see a variety of answers to how thick the subfloor must be prior to laying tile. What's the bottom line.
In my case, I have a kitchen floor I would like to tile -- probably with 16" porcelain, but could go 12" if needed. The joists are 2X8 Doug Fir 16" OC, 10'2" unsuported span.
The current floor is 1/2" plywood with 3/8" particle board on top. Everything is in sound condition.
My intention was to float the surface for tile installation or, I could go Ditra, or whatever is a good choice -- but not go cost crazy.
How should I prep the sub floor. It what I have adequate? Should I add 3/8" or 1/4 inch plywood on top of the existing particle board and ply and screw it all into the joists? Should I rip out the particle board and put in 5/8" plywood? What will work, and what would be best?
Thanks for any help -- Rodger
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