Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.

I am refinishing my bathroom, and a near-future task is flooring. I'm going to be using the Schluter Ditra product rather than hardiboard and I've built up the floor and subfloor for a combined thickness of 1-1/8" (or so). There is a small dip toward the middle of the floor of roughly 1/2" that mostly levels out by the bathroom door. Should that dip be leveled out with a leveling compound before applying the Ditra, or will using thinset to compensate be sufficient? The span of the dip is around 5' long by about 3' wide (width of the wall to the tub), with the deepest part being about 1/2".

share|improve this question
add comment

2 Answers

If you have a good solid base, you can use a modified thinset, the same material to lay the Ditra into. Use a straight edge to screed the thinset over the low spot of the floor, do not sweat the "rake" marks left by the screed. If any "tags" occur from using the screed, they can be scraped off and vacuumed the next day. Then set the Ditra. The Ditra otherwise may not sink into the depression of the floor and get a good bond to the substrate. Also, the flatter you get you floor to start, the easier it will be to get the tile to lay in plane with the surrounding tile.

share|improve this answer
add comment

Absolutely, otherwise your ceramic tile will crack. You'll need to smooth it out someway. In fact, it would be smart to put type of sheeting down under the Ditra down if you can. That way you know it will be flat.

share|improve this answer
    
What type of sheeting should be put down under the Ditra? –  Tester101 Jan 23 at 11:49
    
It depends on how bad the unevenness is. You could use 1/4 inch lauan(very smooth). Or even 1/2" plywood if you need something more rigid. If you do go with the plywood, make sure it has a nice smooth side without knot holes. –  Maelish Jan 23 at 19:18
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.