help! what next?

Just finished ripping up 2 layers of linoleum up on my kitchen floor. I then noticed that they was a peice of a 1/8 inch plywood (so I ripped that up also). Under that was another layer of linoleum I then took that up as well. What I am now left with is a 1/8 th inch peice of plywood nailed to t and groved peices of wood (they are on a diagnal) about 5 inches wide and 3/4 inches thick.
Question 1: should I take up that peice on 1/8 th plywood? Or can I screw it down and put 1/4 inch hardibacker? Question 2: can I use ditra insted of hardibacker? Height is not an issue. The studs are 16 inches on center and floor seems strong. Thanks for any help.

Take the 1/8" plywood out, then put 3/4" plywood back down.

If height is not an issue I would use Hardie Backer, but you can use either one both are good products just follow the manufacture's directions

You can use 1/2" plywood if you like over the planks, then Ditra would be my choice.

The thicker the plywood the better, but 1/2" is plenty. I prefer Ditra too, it's a better method.

Make sure the new underlayment is not CDX, which is cheap sheathing and not for floors.

So then what? Ceramic or porcelain tiles?

Jaz

Porcelain. One more question: would it work to screw down the 1/8 plywood then glue and screw down 1/4 inch hardibacker. (the 1/8 th plywood is on t and groved peices of wood (they are on a diagnal) about 5 inches wide and 3/4 inches thick?) thanks

You may want to double check that plywood, I doubt it's 1/8" thick. Should be (5.5) mm just under 1/4". It's probably luan, so it'll swell if any moisture gets near. There is no spec that allows it anywhere in a tile installation. Doesn't mean it'll fail 100% of the time, but even 10% if too high.

Another reason to add more plywood is because your planks are not a stable subfloor in its self.

Jaz

Ok thanks for all your help. I will take it up then 1/2 plywood and ditra. Thanks again.

What should I use nails or screws when putting doown the 1/2 plywood, what size? Then versabond mod. Thinset under ditra. Then unmod. Thinset to set the tiles. right? thanks!