both the white and the blue are doing it, the red that was done in my sisters old room isnt doing it, and that was the same kind of paint done at the same general time
no idea what kind / brand of paint it was tho, none was left over so theres no paint can to check anymore …
happened within a few weeks of being painted originaly, and none mokes upstairs. if that was the case, the walls in my roomwould have the same thing (my room has a vent that leads from above the fireplace, which channels downstairs crap into my room)
Id be willing to bet it is some form of mold. I have the same thing happening in my bathroom on the ceiling because my wife and 7 year old son take super hot showers and the humidity level is more then the exhaust fan can exhaust. My plan is to cut out the ceiling dry wall and add largest cfm fan i can buy and then replace the drywall.
I suggest you have someone take a look at your problem so no one in your house gets sick.
Surfactant leaching,: surfactants are chemicals added to paints to improve paint flow and or to aid in formation of an emulsion. As I stated above at “incompatible paints”, surfactant leaching can occur, for example, if there is an incompatibility between the primer coat and the finish coat. Paint chemists formulate primers and topcoats to work together as a tested and proven paint coating system.
i had the same problem at my old apartment. Because of the guy that use to live there who smoked all the time no matter what we painted or did to the walls when it came to the humidty the walls bled brown. Dry wall actually absorbed the tar and no matter how many times you paint it, it will still bled out of the drywall. Even if you dont smoke up stairs or whatever over time the build of small amounts of smoke will still be absorbed into the drywall.
I’m willing to bet a 6-pack it’s rained between the time you painted and when this occurred.
better get that fixed
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again, i checked the area above the stairway ceiling, its spotless except forsome dust bunnies … this statement includes a total lack of water stains
and the roof is a 8 year old total tear of job, all new tar paper, 30 year shingles, and the bare sheeting hardly even leaked when we had a freak spring snowstorm while the shingles were off