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Hairline Fractured Stone Floor Tiles

Posted: Sun Dec 30, 2007 12:14 pm
by Cimarron
Please advise,

I have stone floor tiles over gas underfloor heating.Some of the tiles,but not many,have begun to crack,mostly hairline.I wish to know whether it is necessary that I should replace them if the cracks are detrimental to the heating in anyway.

Many thanks,

Cimarron