Tile Floor Prep Advice


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Old 04-12-08, 07:03 AM
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Tile Floor Prep Advice

I am installing new tile in a foyer/powder room/hallway. I have pulled up the old slate that was adhered with mastic directly to the 5/8 TG subfloor. The floor joists vary from 16" OC to 10" OC. The longest span is 11' with the majority at about 8'. There is still mastic residue left on the subfloor, and I'm not sure that I want to take the time to remove it all. My thought is to either install 1/4" CB directly over the subfloor, or install new 3/8" ply and Ditra. Any comments or stuff I've missed is appreciated.
 
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Old 04-12-08, 09:39 AM
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What type of tile are you planning on installing again?

If it's ceramic or porcelain you can thinset and screw down a hardiebacker board and go to town.

If you plan on installing a natural stone, the subfloor needs to be at least 1 1/4" thick, then a cbu or Ditra.
 
 

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