I agree with Fred -we see this quite often with porous stones.Just to add-It is hard to solve as I think Fred will agree that stone is possibly damp stained.Damp stained stone is very hard to correctOn Thu, Jul 19, 2018 at 11:47 AM, Fred Hueston <fhueston@gmail.com> wrote:this is a common problem in showers. It may be the shower pan is backing up with water. I would first check the weep holes in the drain. If there clogged the shower pan wont drain properly--2018-07-19 11:44 GMT-04:00 Stuart Young <santafefc@sbcglobal.net>:
Recently installed marble shower. Lower rung of tiles darkening (getting wet). Any solution?
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Frederick M. Hueston
www.stoneforensics.comoffice 321 514 6845Stone Inspection and Troubleshooting seminar June 11-14, Melbounre FL
For more details see the training section at www.stoneforensics.comcheck out the Stone and Tile Radio Show at http://www.blogtalkradio.com/drfred Airs every Wednesday at 6pm EST
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