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Exploding floor/ expansion joint jmagerl 10-06-2007
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Posted by John Grabowski on October 6, 2007, 4:31 pm

> I posted once about this but did not realize at the time that it would be
an
> annual event. Every year on the the coldest day of the year the ceramic
> tiles on my kitchen floor pop off with a rather loud band, Judging from
the
> left over tiles, it was an annual affair for the previous homeowner also.
> How do I fix it? Last year I stuck the tiles back down but did not fill
with
> grout. I figured if it was contraction, no grout would give it lots of
room
> to shrink. But...my wife wants grout.
> How do you build an expansion joint into a tile floor?


That reminds me of an incident that occurred before my very eyes. Several
winters ago I was having a conversation in the lobby of a conference center.
Suddenly we both heard this cracking sound and the tile floor next to where
we were standing buckled up and created a bubble about 3 feet long and 4
inches high. I don't know how they corrected the problem, but I had thought
at the time that they probably needed some expansion joints.


Posted by DanG on October 6, 2007, 5:33 pm
If you are going to have to relay the tile, look into Schluter
trim and expansion joints for ceramic. Ditra, and others, make
crack isolators/spanners for concrete joints, but your problem
does not seem to be related to transferring a crack from below.
Are you sure there are adequate fasteners in the subfloor to
prevent movement?

The typical treatment for expansion joints would be to leave out
the grout, but seal the joint with color matched urethane or
silicone caulk.

--
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)
dgriff237@7cox.net



>I posted once about this but did not realize at the time that it
>would be an annual event. Every year on the the coldest day of
>the year the ceramic tiles on my kitchen floor pop off with a
>rather loud band, Judging from the left over tiles, it was an
>annual affair for the previous homeowner also. How do I fix it?
>Last year I stuck the tiles back down but did not fill with
>grout. I figured if it was contraction, no grout would give it
>lots of room to shrink. But...my wife wants grout.
> How do you build an expansion joint into a tile floor?
>



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