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Old 10-11-2011, 03:56 PM   #1
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White dusty film on bedroom walls


What causes a white dusty film on my bedroom walls and how can I get rid of it?

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Old 10-11-2011, 04:59 PM   #2
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White dusty film on bedroom walls


This may be a stupid question, but has there been any drywall work done in your house in recent months?

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Old 10-11-2011, 07:37 PM   #3
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This may be a stupid question, but has there been any drywall work done in your house in recent months?

No there hasn't.
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Old 10-11-2011, 07:39 PM   #4
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White dusty film on bedroom walls


If it where spring, I would say pollen. Where are you located?
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Old 10-11-2011, 09:21 PM   #5
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White dusty film on bedroom walls


White mold?
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Old 10-12-2011, 05:50 AM   #6
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White dusty film on bedroom walls


Pic needed
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Old 10-14-2011, 09:17 PM   #7
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White dusty film on bedroom walls


Maybe they were painted using exterior paint and it's chalking?
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Old 10-15-2011, 04:12 AM   #8
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White dusty film on bedroom walls


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Maybe they were painted using exterior paint and it's chalking?
Now, there is a thought.
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Old 10-15-2011, 06:25 AM   #9
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White dusty film on bedroom walls


Question: Why would exterior paint chalk when used interior?
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Old 10-15-2011, 09:55 AM   #10
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White dusty film on bedroom walls


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Question: Why would exterior paint chalk when used interior?
Kind of made me cock my head when I read this. Reason being, I admit I painted my bthrm a few years ago with exterior paint. No chalking that I am aware of.
I say 'that I am aware of', because I have noticed what looked like some sort of stain trying to run on the walls. Wife said it was dirty walls, but I have never noticed this before. Could it be that it was actually a chalky substance reacting to moisture in the bthrm?

Btw, op? What are your walls made of? Drywall? Plaster? Block? What kind of paint is on them now?

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Old 10-15-2011, 10:10 AM   #11
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White dusty film on bedroom walls


Boman, that stain is surfactant leaching from the paint, it's caused by steam. It's brownish. Wipes right off with water.
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Old 10-15-2011, 04:36 PM   #12
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White dusty film on bedroom walls


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Question: Why would exterior paint chalk when used interior?
Okay, so that's pretty unlikely . . . there are some (not entirely outlandish) situations in which it might happen:

Lots of old windows (non-low-E)

Low quality, highly-pigmented paint - just being exposed to the air would probably result in enough oxidation to break down the binders.

Add occasional washing of the bedroom walls to either of the above conditions and I could see it happening.
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Old 10-15-2011, 05:36 PM   #13
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White dusty film on bedroom walls


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Question: Why would exterior paint chalk when used interior?
Mildewicide leaching out. Hell, I don't know, it sounded good at 4 this morning before my coffee.

Maybe a bag of flour ( or some OTHER white powdered substance) exploded
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Old 08-04-2012, 10:09 PM   #14
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White dusty film on bedroom walls


I am having the same problem that started about when you posted this...just curious..what kind of paint did you use and color? We were trying to figure it out tonight ...if it was the batch of paint that we got...because not happening in other rooms that were painted at different times!
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Old 08-05-2012, 12:14 AM   #15
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White dusty film on bedroom walls


Oil paints will chalk. See the current posts about how lindseed oil paints will. Alkyds should not be so bad. Acrylics should not chalk.

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