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Tile over luan question?


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#1 Pilar

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Posted June 11 2011 - 1:23 AM

I removed vinyl flooring in the bathroom. Underneath the vinyl flooring was lauan(plywood). I would like to put tile down. Can I put tile over lauan?
Where do I go from here?
Any help is greatly appreciated. I want to learn how to put tile and slate down.
Vic


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#2 KevinB

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Posted June 11 2011 - 11:25 AM

no,easiest way to take it up is a circularsaw set at a 1/4 inch, and a prybar, it pops right off the floor.


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#3 longcaster

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Posted June 11 2011 - 11:28 AM

Does the floor bounce when you jump up & down? If the joists move or the floor flexes, no tile will last.

A sub-floor needs to be one and one quarter inch 1 1/4" thick of wood like 2 layers of 5/8" plywood.

If your Luan is on top of a standard 5/8 or 3/4" sub-floor you will have a failure due to flex. Take the Luan up put down adequate thickness wood.

No, tile backer board does not count is making a sub-floor thick/stiff enough to work.


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#4 speedracer

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Posted June 11 2011 - 6:08 PM

In the "good old days" contractors used to tile right over lauan, but nowadays its a bad idea. Get a flat shovel and pull that stuff off.


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#5 NickinMass

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Posted June 11 2011 - 8:28 PM

I have to respectfully disagree - It was never a good idea to tile over luan or other plywood (my current house had tile over plywood in several rooms - tile failures all over the place, but no issues in the one bathroom where they did a proper mortar bed). Yes, you need to check to see if you floor structure is stiff enough, and if it is, then take up the luan, put down hardibacker or cbu, then tile. Michael Byrne (I think I'm remembering name right) published a good book on setting tile (published by JLC).


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#6 speedracer

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Posted June 12 2011 - 8:16 AM

I never said it was a "good idea", just said contractors used to do it all the time.


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#7 Plug and teaser

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Posted June 12 2011 - 9:06 AM

I never said it was a "good idea", just said contractors used to do it all the time.


Yes they did, and it worked just fine when properly done.

First the 3/4 T+G plywood on the joists was screwed down and any lose nails were set.

Another layer of 5/8 fir underlayment was added and screwed down.

1/4 tile grade Luane next, Stapled 4" oc.

I know of dozens of tile jobs done this way that are in perfect condition to this day.



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#8 longcaster

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Posted June 12 2011 - 10:09 AM

I never said it was a "good idea", just said contractors used to do it all the time.


Yes they did, and it worked just fine when properly done.

First the 3/4 T+G plywood on the joists was screwed down and any lose nails were set.

Another layer of 5/8 fir underlayment was added and screwed down.

1/4 tile grade Luane next, Stapled 4" oc.

I know of dozens of tile jobs done this way that are in perfect condition to this day.



What caused success was the thickness of the wood, at least 1 1/4" thick with standard joist spacing.


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#9 Plug and teaser

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Posted June 12 2011 - 10:18 AM

I never said it was a "good idea", just said contractors used to do it all the time.


Yes they did, and it worked just fine when properly done.

First the 3/4 T+G plywood on the joists was screwed down and any lose nails were set.

Another layer of 5/8 fir underlayment was added and screwed down.

1/4 tile grade Luane next, Stapled 4" oc.

I know of dozens of tile jobs done this way that are in perfect condition to this day.



What caused success was the thickness of the wood, at least 1 1/4" thick with standard joist spacing.


I agree.


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#10 longcaster

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Posted June 12 2011 - 10:25 AM

I never said it was a "good idea", just said contractors used to do it all the time.


Yes they did, and it worked just fine when properly done.

First the 3/4 T+G plywood on the joists was screwed down and any lose nails were set.

Another layer of 5/8 fir underlayment was added and screwed down.

1/4 tile grade Luane next, Stapled 4" oc.

I know of dozens of tile jobs done this way that are in perfect condition to this day.



What caused success was the thickness of the wood, at least 1 1/4" thick with standard joist spacing.


I agree.


To satisfy the truly picky folks, after getting wood thickness done, a good tile backer board can be fastened down to the 1 1/4" thick wooden sub-floor.

Substituting tile backer for wood thickness is not a solution, it is a failure waiting to happen.


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#11 speedracer

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Posted June 12 2011 - 10:38 AM

[/quote]I know of dozens of tile jobs done this way that are in perfect condition to this day.[/quote]

I've torn out dozens and dozens of bathroom tile jobs that had nasty,rotten, moldy lauan in the shower area and around the toilet.
Lauan backing would work in a kitchen under a counter top back splash or in an area that won't get wet, but NEVER in a bathroom.




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#12 gray gables

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Posted June 12 2011 - 11:30 AM

here's what happens with luan, it sucks the moisture right out of the mastic creating a bad bond between the tile and the subfloor, why can't people just the installation instructions on how to install stuff that way your warranty is covered, duh, common sense if you ask me


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#13 Pilar

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Posted June 12 2011 - 12:49 PM

Hi Folks,
This great information that you are providing me. I truly appreciate it.
Another question, once I get the luan up there is a hard wood floor underneath the luan, where do I go from there?
Tight lines,
Victor


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#14 mericanwit

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Posted June 12 2011 - 1:11 PM

Checkout Schluter; Ditra pretty good stuff....


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#15 gray gables

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Posted June 12 2011 - 1:29 PM

Hi Folks,
This great information that you are providing me. I truly appreciate it.
Another question, once I get the luan up there is a hard wood floor underneath the luan, where do I go from there?
Tight lines,
Victor


I would go over the hardwood with a 1/4 tilebacker board, that would work, or you could go the extra mile and tear up the hardwood floor, shouldn't take more than an hour to get the stuff up,


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