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Old 05-09-2019, 09:12 PM   #1
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Need help with ceramic tile

Need help with tile flooring
I've got a job redoing kitchen for some family I'm a full time mechanic with minimal carpentry experience learning as I go. I've kind of got myself stumped on this one though. The house was originally a mobile home that has had rooms added on throughout the years and previous owners. I've got about 600 sq ft I'm working with and about a quarter of it is a concrete slab the rest is regular plywood/ osb I know I'll have to put down concrete board on wood part but when I do itll be 1/2 inch higher than slab. So what do I do to get this floor level? Concrete board over concrete? Resurface concrete 1/2 thick?
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Old 05-10-2019, 04:30 AM   #2
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Re: Need help with ceramic tile

Welcome to the forums! Check the wood flooring to make sure it is not particle board. That is the common flooring for some mobile homes. If so, it is not a good substrate for hardly anything, especially tile as it will buckle and swell with moisture. If it is OSB or Plywood, and is in good shape, then adding the 1/4" cbu will work fine. Since you have a difference in elevation, and if it is flush now, you could also use the Ditra membrane system over it all, provided the wood part is properly supported. How thick is the wood flooring, what spacing is the floor joists, and what is the total unsupported span of the floor? It will make a big difference in flexibility and the use of the Ditra, or cbu for that matter.
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Old 05-10-2019, 09:18 AM   #3
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Re: Need help with ceramic tile

Hi 223, welcome.

Just so you get the terminology right, it's called "cement board", not concrete board.

As Chandler says, you really need to get down underneath the wood floor and check to see if it is properly supported and can handle the weight of tile.

Generally, it's not a good idea to put cement board over a concrete slab. Check this out:

Good luck!
Just my 7 cents (2 cents after taxes and inflation).
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