removing ceramic floor tile on cement board on wood

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Old 06-16-15, 03:20 AM
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removing ceramic floor tile on cement board on wood

I've currently got ceramic floor tile on cement board on wood. I want new tile (some ******* decided to save $ with cheap tile with blemishes everyhwere). Am I correct that I will need to remove and replace the backer board? I doubt that I could just split off the tile and thinset. I'm also pretty sure that I wouldn't want to plan on reusing the backer board. My questions:

1. Am I correct that I will need to remove and replace the backer board?
2. How do I go about removing it? I see videos of people using a mini-circular saw to cur out each individual tile and pop them out one at a time. I think that will only work well if there isn't thinset btw the board and the substrate.
3. What if there is thinset btw the backer board and the wood floor? Is this a good time to poor the back board?

I've only placed new tile over new backer board on original substrate.
 
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Old 06-16-15, 03:29 AM
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You can use a masonry blade on the circle saw. There will be a lot of dust so keep children away.
 
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Old 06-16-15, 03:48 AM
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1) Correct
2) Best way I know is to gain access by breaking up a section and using a rotary hammer or jack hammer (light version) under the backer. There will be nails/screws holding it to the wood. Popping each tile may not be an option, and would be time consuming, when they will be destroyed anyway.
3) There should be thinset between the cbu and the wood. That is the proper way of installing it.

You can also use a slammer to help peel the floor off the wood. It is going to be messy and you will have dust everywhere, so be aware.

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Old 06-16-15, 04:46 AM
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A demo hammer and a tile bit will assist in popping off the time. It will be a mess and take a good amount of time and energy if it was done correctly. I have successfully removed tile from cement board and then reused the cement board in place. You won't really know if this is viable until you begin. You will then have to chip the majority of the trowel marks off the cement board to get it as smooth as possible. I then trowel on self leveling compound (yes I said trowel - Flat smooth side) to fill the dips and voids. I add mesh tape to any areas where it was compromised. I have also done this to a tub surround with similar positive results.
 
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Old 06-16-15, 12:02 PM
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Is it worthwhile to try and remove the tiles but leave the BPU?

That seems like it would be a lot of work with limited reward in that I'd then be laying tile over bad bpu.
 
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