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Unread 09-03-2013, 09:22 AM   #13
cx
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Join Date: Jul 2001
Location: Boerne, Texas
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You do what you want, Joe, but the Hardibacker is made in layers and it remains structurally sound when all the layers are intact. What you're proposing, if you can make it work, will remove half or all the layers in some places, leaving you with not much of a CBU installation at all, eh?

If you do try to sand off that much Hardibacker, I very strongly encourage you to wear serious breathing protection, keep your daughter, and everyone else, out of the area, and to shut down any HCAC system that might otherwise be running. The dust from that CBU is nasty.

But not to fear, you won't get much of it sanded off anyway.

Then you can cut out a section and re-do it.

My opinion; worth price charged.
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