Oily yellow spots on bathroom ceiling


  #1  
Old 01-03-19, 07:14 AM
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Oily yellow spots on bathroom ceiling

Hello>
I am near completing a bathroom renovation in which I have repainted the entire room including the ceiling.
I used 2 coats of Zinsser Stain Blocker oil based primer and then followed up with 2 coats of Kilz ceiling paint.
I allowed 24 hours between coats for it to dry and then it was another 24 hours before we used the shower again.
The day after we started using the shower again, yellow oily 'drip spots' and patches appeared on the ceiling along the outer wall of the bathroom. (pictures attached). The spots were of an oily texture and smeared when wiped and the patches were subdued but visible.
NOTE: There were NO spots prior to me painting the ceiling.
Can anyone provide a reason for this issue?
NOTE: we do run a ceiling fan but still get some level of expected humidity in the bathroom with longer showers.
 
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  #2  
Old 01-03-19, 08:25 AM
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Zinsser is good primer but I have never used Kilz paint. That said, I would suspect the paint as being the issue. I would apply another coat of primer and then a different paint like Zinsser Perma White and see what happens.
 
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Old 01-03-19, 08:26 AM
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Thanks
At this point I'm willing to try it.
The remodel is coming around and I really like how it looks...with exception to the ceiling...
 
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Old 01-03-19, 08:29 AM
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Is the exhaust fan in a different location? While I second the recommendation for PermaWhite I'm not sure the paint is the issue.

btw - welcome to the forums!
 
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Old 01-03-19, 08:38 AM
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The ceiling fan is located 2 to 4 feet from the stains.
I replaced it in the process of the remodel but other responses have me wondering if there is enough airflow into the bathroom.
 
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Old 01-03-19, 08:42 AM
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Does the fan have good suction? maybe the ductwork got compromised along the way ??
 
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Old 01-03-19, 08:46 AM
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I assumed the variable of the fan had not changed, my bad on that.
 
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Old 01-03-19, 08:47 AM
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I didn't do anything with the ducting (only swapped out the fan) but I will definitely check on it.
Would the staining appear so quickly if its a ventilation issue?
 
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Old 01-03-19, 08:49 AM
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If you're getting condensation on the ceiling from the shower being used, it's certainly possible.
 
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Old 01-03-19, 11:45 AM
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The duct could have gotten bent or something inadvertently pushed up in it - stuff happens.
 
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Old 01-05-19, 09:47 PM
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Was the paint stirred adequately prior to use?

Did the paint (and also the primer) isntructions say how long you would have to wait (for the paint to cure as opposed to just be dry to the touch) before it is safe to expose to water or rain?
 
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Old 01-06-19, 08:34 AM
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The suggestion was 24 hours which I did wait more than that.
 
 

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