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Installing 1/2' thick ceramic tile over oak floor

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Installing 1/2' thick ceramic tile over oak floor Mikepier 10-23-2007
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Posted by Mikepier on October 23, 2007, 10:42 pm
A few weeks ago I asked if I could tile over oak floor area in my
foyer 4'X15' and everyone suggested using some kind of underlayment.
Recently my wife and I picked out a tile that is 1/2" thick and is 11
3/4" X 11 3/4". This tile looks a lot more beefy than ordinary tiles
and of course costs twice as much. Now the problem is because it's
1/2" thick it would be a problem heightwise even if I used a 1/4"
backerboard. So my question is will this tile be less likely to have
problems if I go over the wood floor because it's so thick even if I
screwed down the floor at every joist.
By the way my combined subfloor and hardwood thickness is 1 1/2".


Posted by Noozer on October 23, 2007, 10:56 pm

>A few weeks ago I asked if I could tile over oak floor area in my
> foyer 4'X15' and everyone suggested using some kind of underlayment.
> Recently my wife and I picked out a tile that is 1/2" thick and is 11
> 3/4" X 11 3/4". This tile looks a lot more beefy than ordinary tiles
> and of course costs twice as much. Now the problem is because it's
> 1/2" thick it would be a problem heightwise even if I used a 1/4"
> backerboard. So my question is will this tile be less likely to have
> problems if I go over the wood floor because it's so thick even if I
> screwed down the floor at every joist.
> By the way my combined subfloor and hardwood thickness is 1 1/2".

What condition is the original floor in? If it's in decent shape I would be
very hesitant to cover it at all, or at least to permanently marr it up.



Posted by Mikepier on October 23, 2007, 11:15 pm
>
>
> >A few weeks ago I asked if I could tile over oak floor area in my
> > foyer 4'X15' and everyone suggested using some kind of underlayment.
> > Recently my wife and I picked out a tile that is 1/2" thick and is 11
> > 3/4" X 11 3/4". This tile looks a lot more beefy than ordinary tiles
> > and of course costs twice as much. Now the problem is because it's
> > 1/2" thick it would be a problem heightwise even if I used a 1/4"
> > backerboard. So my question is will this tile be less likely to have
> > problems if I go over the wood floor because it's so thick even if I
> > screwed down the floor at every joist.
> > By the way my combined subfloor and hardwood thickness is 1 1/2".
>
> What condition is the original floor in? If it's in decent shape I would be
> very hesitant to cover it at all, or at least to permanently marr it up.

The floor is kind of marred up already. I removed the old tile and
1/4" plywood that was on it originally. Structurally its fine.
We have oak floors throughout the first floor, but we liked it better
to have tile in this entryway because it was easier to clean plus the
tile floor continued into the kitchen, which I am remodeling.


Posted by Big_Jake on October 24, 2007, 9:23 am
> A few weeks ago I asked if I could tile over oak floor area in my
> foyer 4'X15' and everyone suggested using some kind of underlayment.
> Recently my wife and I picked out a tile that is 1/2" thick and is 11
> 3/4" X 11 3/4". This tile looks a lot more beefy than ordinary tiles
> and of course costs twice as much. Now the problem is because it's
> 1/2" thick it would be a problem heightwise even if I used a 1/4"
> backerboard. So my question is will this tile be less likely to have
> problems if I go over the wood floor because it's so thick even if I
> screwed down the floor at every joist.
> By the way my combined subfloor and hardwood thickness is 1 1/2".

The tile will likely be ok, but the grout will crack.

I recently did tiled two kitchen floors in a duplex. On the advice of
a tile pro, I put down ECB membrane, which is an antifracture
membrane, and I tiled over that. I had exactly enough membrane to do
both kitchens, and skipped a small area that would be covered by
cabinets. I tiled and grouted, and all the grout lines cracked in the
small areas where I hadn't used the membrane, in less than 24 hours.

JK


Posted by Manster on October 24, 2007, 12:38 pm
Mikepier wrote:
> A few weeks ago I asked if I could tile over oak floor area in my
> foyer 4'X15' and everyone suggested using some kind of underlayment.
> Recently my wife and I picked out a tile that is 1/2" thick and is 11
> 3/4" X 11 3/4". This tile looks a lot more beefy than ordinary tiles
> and of course costs twice as much. Now the problem is because it's
> 1/2" thick it would be a problem heightwise even if I used a 1/4"
> backerboard. So my question is will this tile be less likely to have
> problems if I go over the wood floor because it's so thick even if I
> screwed down the floor at every joist.
> By the way my combined subfloor and hardwood thickness is 1 1/2".
>

An 1-1/2 is a pretty thick sub-floor already without adding a 1/4"
board. If the oak floor is roughed up a bit and the joists are not
spaced too far apart and there's no flexing between them, you should be
fine. Someone mentioned sealing the sub-floor first, but I disagree. A
sealer may interfere with the adhesive you use for the tile.

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