Why is my White Marble Turning Yellow?
Architectural Ceramics
DECEMBER 10, 2015
Yellowing may still happen in a shower area where mud work or wet bed has been done using Gray Portland cement. When the stone is exposed to water, moisture penetrates the stone and grout and into the mud bed, activating the loose particles of cement. The tile would then be installed with White Thinset directly on the membrane.
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