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-   -   Ditra over Cement Backer board (https://www.johnbridge.com/vbulletin/showthread.php?t=113036)

awdpsi 06-21-2014 12:13 PM

Thanks cx. Also thanks for moving post. I was debating about which practice I should use here ( keep all questions together or separate them by relevance). I now know the answer.

Thanks again

awdpsi 06-22-2014 07:12 PM

So I ran into a ton of family issues this weekend and didn't get to laying tile.

I just finished putting down the ditra. My question is how long can I wait to tile?

With the ditra down now can I wait till Saturday, 5 days to tile ? Wasn't sure if there was a time that you must lay tile from the time ditra is set.

Houston Remodeler 06-22-2014 07:33 PM

You can wait as long as you'd like. Just refrain from rolling heavy objects over it.

Normal foot traffic is fine.

If in doubt, or you see you are crushing the ditra, add some pieces of plywood or drywall to the surface

awdpsi 06-22-2014 08:32 PM

Awesome! Thanks Paul!

CCDIYer 06-24-2014 07:20 PM

Hi Scott, I was curious as to how easy/hard it was and what method you used, to remove the excess thinset from your diagonal plank subfloor when you removed the cement board? You used a modified thinset correct?

I think you make the right call to correct your error and take up the CB, installing plywood in it's place.

awdpsi 06-24-2014 07:27 PM

Clare. A lot of the thinset seemed to come up attached to the cbu. There were plenty of areas where I used a wide pry bar to chip away at parts. Then I was using a heavy hammer to beat some of it into submission. Honesty it just took some time. Pulling up the cbu actually worked best using 3 pry bars like wide demo bars. I put them evenly spaced on one side of a sheet and would take turns smacking them in. It brought up the biggest sections.

awdpsi 06-26-2014 06:50 AM

Gentlemen, I come to you with a problem, AGAIN. In my hast to remove the CBU and install the plywood I missed a step.

I have a 2.5 ft x 2ft outcove where my toilet is that goes about 5/16 - 3/8" lower then the rest of the floor. Its a flat desent but 5/16-3/8" lower at the wall none the less. I had leveled this with the CBU in but then I ripped it up to add the 5/8" ply and forgot to address it.

Now the Ditra is down. (Im sick to my stomach again)....ANYHOW...is there any product that I could use over the Ditra to build up that 2ft x 2ft section up so the entire floor is flat? Any unmodified medium motars that I can use in that area to gain 5/16-3/8" so I can then put tile down.

Im sorry I am so dumb...I just figured this is still the best source for a valid solution. Im sure you will suggest ripping ditra up to level, but any suggestions are appreciated.


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