The strange thing is that two of my walls are brand new plaster and they didn't peel at all, So I'm thinking that it couldn't be the primer. With a brand spanking new ceiling, dust is the only thing that I can guess it was, when considering that the primer came up in sheets in some areas and not at all in others. Also, it's just the primer, not the plaster that's peeling/bubbling. To answer your other questions, I waited more than a month before touching the ceiling, and while the ceiling backs to my attic, there are no pipes running overhead and before the plaster job, I put R-30 between the attic floor joists, so I know it's not a temp/moisture issue. I was also doing alot of trim work in the hall outside of this room, (a week or more after the plaster job, and know I kicked up dust from the saw, etc. The ceiling did look smooth as a baby's behind, but I took his advice. Sorry to say, it was recommended by a GC friend that I lightly sand with mesh screens, using a pole sander. check this first and do what you can to remedy it, if not the problem will never go away and the paint will do the same thing as the cond did you wait the 30 day cure time for the plaster before priming and was the primer specified for plaster.when plaster cures the chemical reaction creates an unstable PH level for normal primers and paints.for future reference there are alkly (close to spelling pronounced ale-ka- lie)resistent primers made for concrete type surfaces such as plaster and morter.can be used prior to 30 day cure and in my opinion should be used on these areas regardless.another question is the plaster bubbling too or just the primer? having said that i have seen primer not bubble or pull away from dust but only fail such as when blue tape was applied then pulled off or if sanding was so that it was sanded through the primer to bare wall then the easy pulling off of primer was present from the dust being on it like flouring a pan before baking.being that you say it is only the ceiling ,my question is what is above the ceiling.are there water lines running above it and are they in the attic, cold lines will sweat in a hot area,a bathroom,an outside patio,a flat roof or a roof that needs redone.moisture may be the problem. For starters,just curious as to why you had dust on the ceilings and walls,plaster is not to be should be as smooth as a babies butt when applied by a good plasterer.even if the plaster work was sub par don't sand it,prime first then mud in areas that are eye popping or uneven then sand.
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