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Old 03-01-2011, 02:18 PM   #1
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Tiling over old floor


I want to tile a room in my parents' house. The current flooring is about 35 years old, some sort of old glued-on tile (best i can tell). It's very thin. I am not sure if there is any backerboard underneath it or if they are adhered right to the wood subfloor.

What is the best/easiest way to do it? Can I get 1/4" hardiboard , screw it down (mortar too?) to the old tile and just put porcelain/ceramic right on top of it? Raising the floor 1/2" to 3/4" should be ok.

Also, how do I cut curves in tile? I have a rotozip, is that a decent tool for the job?

This will be the first time I've ever tiled anything, so I appreciate the advice.

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Old 03-01-2011, 07:22 PM   #2
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Tiling over old floor


Knock the old tile off the floor--You will find that it will bounce right off--scrape the floor as clean as can be---set your Durrock in thinset (1/4" is all you need) --screw it down--ready to go.

Let us know what the floor structure is--Plywood/OSB--floor joist size and span.

Roto Zips make terrible tile cutting tools----what sort of curve are you hoping to cut?

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Old 03-01-2011, 11:25 PM   #3
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Tiling over old floor


THe joists are 2x8s, I believe 16"oc. Plywood floor, I think (I need to go there to check for sure).

If that tile doesn't come off easily, can I put backerboard right on top of it? I need to curve around the bottom of the stairs, the bottom step widens and has a curve around the edge.
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