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Unread 12-17-2007, 10:30 AM   #1
Wade Wall
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drywall dust on durock

Hi all,

I am new to tiling and have installed durock and am almost ready to start. However, I sanded the walls and there is drywall dust on the durock. I have tried to clean it off the best I can, but there is still some in some of the crevices. Is this a problem, and how much will it compromise the thinset, if at all?

Thanks,

Wade
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Unread 12-17-2007, 12:10 PM   #2
KenH83
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This is a problem and the CBU needs to be 100% clean.

Run a vacuum over the entire surface. One done with that take a damp sponge and wipe down all the CBU (rinse sponge frequently), spread the thin-set and lay the tile.

Ken
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Unread 12-17-2007, 12:14 PM   #3
Dave Taylor
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Not sure, Wade, if you sanded drywall and then somehow got drywall dust from that work in your Durock, of if you sanded Durock and got Dorock dust in your Durock.

I spose' though that if anything loose and fine (either Durock or drywall dust) gets between the surface you wish to bond to (Durock) and the adhesive you wish to bond with (thinset) it's not a good thing.

Vacuum the dust off of -and out of- the Durock..... then wipe the Durock down with damp rags.... then go forth and dust thy Durock no more :---).

Hope this helps.

What Ken said too.
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Unread 12-18-2007, 02:44 PM   #4
Wade Wall
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Thanks for the advice. Drywall dust will hit durock no more after this.

Wade
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