I have seen this in travertine floor tile.
Too much water coming up through the floor. There is something in the fill
that reacts with the water and the one I saw looked the mushrooms growing in
in the floor.  I don't think they installed a vapor barrier.
This is a good one for Fred.
Hector Castillo



-----Original Message-----
From: list-manager@stoneandtilepros.simplelists.com
[mailto:list-manager@stoneandtilepros.simplelists.com] On Behalf Of Tony
Deluna
Sent: Thursday, August 18, 2016 12:22 PM
To: Stone And Tile Pros Link <sccpartners@stoneandtilepros.simplelists.com>
Subject: Limestone Spalling

Hey pros, does anyone know what causes the type of Spalling. It's only on
the floor at the shower wall tiles are all fine.


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