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Old 11-28-2010, 12:20 PM   #7
Old World Tile and Marble
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Join Date: Sep 2007
Location: albany new york
Posts: 1,341
i think the 2 layer ply under cbu for stone is to clarify the vagueness of the old 1 inch and an eighth = good never meant to imply one layer ply one layer cbu and your good
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