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Unread 11-29-2019, 03:09 AM   #13
Moderator -- Mud Man
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Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 32,771
Jeff, can you post us a picture of the metal arch you're talking about? If you can fasten the Durock to the metal with sheet metal screws, I would. I usually put a mud bed over all the metal fireboxes I've tiled and I use self tapping screws to fasten my lath. If the surface is flush, I don't see why you can't do the same with the Durock.
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