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Unread 09-18-2007, 08:37 AM   #1
thatgirl515
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Unhappy Large porcelain with HEAT issue

I have two jobs with 18" porcelain tiles with issues- one is over a year old- one is almost a year- one is inside a private residence over Warm Tile heating system- one is exterior in direct sunlight on the side of a building for most of the day- (the other side of the exterior job which gets no sun is fine) the exterior job was set with Latacrete MultiMax thin set- the interior job was set with Mapei Ultraflex. Both are turning out to be complete failures! Does anyone know if the heat would have anyting to do with it? Does anyone know of a special installation method I should use for the re-do? I would hate to have these jobs fail again- Thanks for your help.
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Unread 09-18-2007, 08:42 AM   #2
ddmoit
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What are the dimensions of those jobs? If they are large enough, they would require expansion joints - especially the one with sun exposure.

Here is a liberry link that addresses expansion joints: http://www.johnbridge.com/vbulletin/...ead.php?t=1976
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Unread 09-18-2007, 08:42 AM   #3
stullis
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Did you use an anti-fracture membrane and/or allow expansion space around the perimeter or expansion joints in the field if needed?
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Unread 09-18-2007, 11:31 AM   #4
thatgirl515
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Thanks for your replies. The interior job is about 60sf- no span more than 5' on a bathroom floor- no anti-fracture membrane or expansion joints were used.
The exterior wall is about 12' high x16' wide with a 8'x8' window in th middle. No membrane or expansion joints were used here either.
The tile is not cracking, the thin set is failing. Tiles are popping off. In over 25 years -never had something like this happen.
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Unread 09-18-2007, 06:26 PM   #5
Scottish Tile and Stone
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How long did you wait before the mat was turned on? The outside walls tile is just falling off?
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Unread 09-18-2007, 07:49 PM   #6
thatgirl515
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Several weeks before the warm tiles were turned on- and there are other rooms in the house with the warm tiles and no problems- (although only 12" tiles) and yes the walls tiles are just falling!
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