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Unread 08-28-2006, 12:39 PM   #1
JPfeif
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Join Date: Aug 2006
Location: Auburn, CA
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Cleaning subfloor for tiling

I just discovered this site today. Looks very useful! We are DIYers who are preparing to tile our entry. The subfloor is new OSB, over which I anticipate that we will use Ditra mat then tile (based on reading I've done so far). I don't have all the subfloor/support specs at hand right now, so I will get back with that info tonight for confirmation/revision that Ditra is appropriate.

On the assumption that it is, I understand that subfloor needs to be clean for good adhesion of the thinset. How clean is clean? My concern is this: When I did the interior priming/painting (with sprayer) I did not cover the subfloor. Now there seems to be a never-ending supply of fine dust coming off the subfloor from the settled spray. We have vacuumed and swept and I will vacuum again (with a strong shop vac). Am I on the right track? Is there a more effective cleaning method?

Thanks in advance.

Cheers,

John
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Unread 08-28-2006, 01:56 PM   #2
dgunnels
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The problem is that your bond will only be as strong as the misted layer of paint. If it lets go then so will your tile. The pros will have more info but if you could provide a pic that would help. You might also try a light damp mop on the surface. Sort of the equivalent of a tac cloth.
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Unread 08-29-2006, 12:38 AM   #3
Hamilton
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Alot of us will take a damp sponge and clean wipe the dust. After sweeping
and vaccuuming up everything you can clean up, take a damp sponge
and wipe approx. 2-3' on one side,... flip it over and wipe the next few inches
over with the other side of the sponge. this will get most all of the fine dust.
wring the sponge and repeat, moving in sections to assure every area
is dust free.
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Unread 08-29-2006, 09:51 AM   #4
JPfeif
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Thanks for the tips. Sounds like water, sponges, elbow grease, more vacuuming, and persistence will be the key. The dust must end eventually.

Cheers,

John
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