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Old 02-12-2011, 11:58 PM   #1
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Tiling over hardwood in bathroom - Underlayment?


I have 3/4" oak floors that are not even (the wood is almost perfect) that I am putting ceramic tile over in a half bathroom.
I planned on sanding the hardwood floors to remove the finish and then leveling the floors with self leveling cement.
After that I was going to put down mortar then cement board as the underlayment. Then thinset on top of the cement board then tile.
After reading other recomendations to similar topics here and on other sites I am still not sure how to approach this. Am I headed in the right direction or should I use plywood instead? Is this overkill???? I'd hate to end up with brokwn tile and/or grout.

Any and all help with this would be greatly appreciated.

Ray

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Old 02-13-2011, 05:47 AM   #2
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Tiling over hardwood in bathroom - Underlayment?


Hardwood just moves to much throughout the year to set backer board right on top of it--

You didn't mention the age of the house or floor joists or the underlayment under the hardwood--
not knowing that i can only offer the generally accepted method---

Best method---Remove the hardwood---add BC ply 1/2 inch or more thick---then mud set 1/4" Durrock

Then add your tile---Mike---Let us know a bit more about the age and floor structure.

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Old 02-13-2011, 07:49 AM   #3
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Tiling over hardwood in bathroom - Underlayment?


Mike Thanks for the reply. Underneath the hardwood is another 3/4" hardwood floor. The house is about 100 yrs old. The new hardwood is about a year old and the old hardwood is the age of the house.

Also is there a difference between Durrock and wonderboard?

Let me know if you need more info.
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Old 02-13-2011, 08:01 AM   #4
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Tiling over hardwood in bathroom - Underlayment?


O.K.--Antique house----I'd pull up the new layer of hardwood--add 1/2" bc ply--thinset down 1/4 inch Wonder board or durrock (They are both fine--I don't like HardiBacker Personal preference)

Then if leveling is needed use Jiffset and Linewebers latex--or other self leveling compound--then the tile set in modified thinset.

The height of the new tile aught to be about the same as the other floor outside the room.--Mike--
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Old 02-13-2011, 11:06 AM   #5
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Tiling over hardwood in bathroom - Underlayment?


Either way ... plywood over the slats is required before any tile backer goes down.
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Old 02-13-2011, 02:20 PM   #6
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Tiling over hardwood in bathroom - Underlayment?


If I understood correctly--Floor has slats---then old hardwood--then new hardwood--Yes?
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Old 02-13-2011, 02:26 PM   #7
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Tiling over hardwood in bathroom - Underlayment?


I'm imagining diagonal slatted subfloor, then newer slatted hardwood flooring at this time. The hardwood flooring (top layer) can be removed. Yes?

Last edited by Bud Cline; 02-13-2011 at 03:31 PM.
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Old 03-01-2011, 10:13 PM   #8
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Tiling over hardwood in bathroom - Underlayment?


Sorry guys. Had some other things come up and had to put the project on hold. Back on track. Beams, subfloor (pine), hardwood, hardwood. Yes new hardwood can be removed but trying to avoid the extra work if we can.

May be getting ahead of myself here but for cutting the floor tiles I was going to use a diamond blade on my hand saw. Got about 20 straight cuts to make. Think that is sufficient or should I rent a wet saw from home depot?

Thanks again for the help.
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Old 03-01-2011, 11:06 PM   #9
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Tiling over hardwood in bathroom - Underlayment?


Quote:
...for cutting the floor tiles I was going to use a diamond blade on my hand saw...
I thought you said you were trying to avoid extra work!
You'd be wasting your time - rent a wet saw.
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Old 03-01-2011, 11:11 PM   #10
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Tiling over hardwood in bathroom - Underlayment?


Lol...thanks...will do

Ray

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