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Old 09-26-2012, 11:57 PM   #1
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Best way to prep/paint moisture-caused cracks?


Hi all, thanks again for helping out, I really appreciate your advice.

The powder room outside of our master bath has a lot of cracks on the walls (and ceiling). See:


and


I suspect that these were caused by excessive moisture, as this powder room is right outside of the bath and the bath currently does NOT have any vent.

What's the best way to fix these cracks? Should I remove the loose or flaking paint with a scraper or wire brush, sand the area to feather the edges, prime any bare spots, and repaint the surface? That's it? Any other tips or ideas? Thoughts or comments? Thanks!

Also found this article which mentioned about how to fix typical cracks....

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Old 09-27-2012, 03:38 AM   #2
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Best way to prep/paint moisture-caused cracks?


Cannot see the cracks but do as you say and skim the area with joint compound, sand smooth, clean, then prime and paint

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Old 09-27-2012, 05:41 AM   #3
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Best way to prep/paint moisture-caused cracks?


The one other thing I do is after scraping before skim I will spot prime them with Gardz. That will penetrate any cracks and make a moisture barrier so the mud doesn't reactivate any of it.
Might not be needed but it is an easy insurance coat.
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Old 09-27-2012, 08:04 AM   #4
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Best way to prep/paint moisture-caused cracks?


Looks like you have two thing's going on there. Both of which have nothing to do with moisture.
The diaganal crack is from normal house settling, the vertial crack if I had to guess is because someone messed up and did not use a soild piece of drywall over the door. A door or window is a weak spot on a wall so whenever possible it's best to not have a seam over them.
It's there cracked then I'd cut out the old tape, sand over the area to get it flat, wipe it off and apply new paper tape.
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Old 09-27-2012, 10:01 AM   #5
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Best way to prep/paint moisture-caused cracks?


Maybe I'm not seeing it but to click on the pics i'm not seeing cracks as much as cracked and peeling paint that really looks like a moisture problem. Since you can't get oil based out there I think this going to be a continuing problem until you can figure a solution to the vent.
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Old 09-27-2012, 04:44 PM   #6
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Best way to prep/paint moisture-caused cracks?


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The one other thing I do is after scraping before skim I will spot prime them with Gardz. That will penetrate any cracks and make a moisture barrier so the mud doesn't reactivate any of it.
Might not be needed but it is an easy insurance coat.

true that

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