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Unread 02-08-2019, 01:44 PM   #1
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Join Date: Feb 2011
Posts: 5
Blue Stone Watermarks

Any thoughts on why this is happening and what can be done to fix it? The stone has been scrubbed with an alkaline stone cleaner, a slightly acidic acid cleaner and ground in a test area. The whitish staining remains. The whitish color is not chalky or crystallized on the surface.

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Jim Cuviello

Last edited by Tool Guy - Kg; 02-08-2019 at 06:59 PM. Reason: Rotate pics upright. :)
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Unread 02-08-2019, 03:31 PM   #2
Join Date: Dec 2010
Location: four seasons area
Posts: 2,450
I think what you have there is moisture build up under the stones , especially on the path trapped in between the brick walls .

Is the stone higher than the junction brick/footing of the supporting concrete for the brick walls ?

There was something here but is no longer available
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Unread 02-08-2019, 06:57 PM   #3
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Join Date: Apr 2004
Location: Arlington, outside Boston
Posts: 782
New install, or installed a long time ago? Agree it does appear like water underneath trying not migrate out...

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