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Unread 10-06-2012, 12:24 PM   #1
makeysor
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Bizarre discoloration on saltillo tile

We have a house full of saltillo tile so I'm familiar with the natural color variations, efflorescence, and other discoloration issues. I now have several tiles in the kitchen that have rapidly (over the last month) developed some bizarre discoloration. This tile is around 18 years old. We find no signs of water leakage and this looks like something more than efflorescence. Any suggestions??

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Unread 10-06-2012, 01:46 PM   #2
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Welcome, makeysor. Please change that permanent signature line to a first name for us to use.
Quote:
Originally Posted by makeysor
We find no signs of water leakage and this looks like something more than efflorescence.
I'm gonna suggest you may have found your first sign of a water leak.

What is the subfloor under these tiles?

Do you know how your tiles were set, like on a mud bed, directly on concrete, other?

Can you show us a photo of more area around those tiles? And please make the photos much larger. You can attach .jpgs up to 2Mb in electronic size and our program will accept and re-size them for posting.
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Unread 10-06-2012, 07:33 PM   #3
Brad Denny
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Sealer blistering from sink spills and added foot traffic?
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Unread 10-07-2012, 09:49 AM   #4
makeysor
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More pics

I've attached a couple of pics showing more of the area. This is definitely a high traffic spot, close to the sink. The sub-floor is concrete. As far as I know, the tiles were laid directly on the concrete. We're not aware of any water lines that run below this section and the cabinetry is not showing any signs of water damage or moisture. Name:  IMG_0301.jpg
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Unread 10-07-2012, 11:33 AM   #5
Tool Guy - Kg
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Hi Mary,

My first thought after seeing your pics was that there is excessive moisture coming through the floor.

Examine all possible moisture sources.

Are the two walls represented in the picture outside walls to the house? If so, I'd ask if you have a sprinkler system outside. Water spraying the side of a house from a sprinkler head is another place to explore in your detective work.

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Unread 10-07-2012, 12:07 PM   #6
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Would CX's test for slab moisture be useful? - tape down a couple 2' by 2' squares of clear polyethylene sheeting such that the edges are well sealed to the tile and wait 72 hours to see how much liquid moisture collects under the poly.

Icemaker, dishwasher lines under cabinets (in the kick)?
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Unread 10-08-2012, 06:59 PM   #7
makeysor
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Thanks for the suggestion on testing for moisture on the tile. I'll try that...as well as doing some more sleuth work on discovering where the moisture may be coming from. Thanks!
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Unread 10-08-2012, 07:06 PM   #8
Tool Guy - Kg
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Besides the plumbing and sprinkler suggestions to check for, what about another possible thing to check for: by any chance, do you have a downspout located nearby that spills onto the grass right next to the house instead of being diverted several feet away?


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