Recently moved into a home we were told was stripped to the studs and remodelled. It's important to work carefully though if you don't want your paint to peel again. To begin, I used a paint scraper to scrape away all the loose paint. If the humidity levels in your bathroom are high enough to cause the ceiling paint to bubble, then the humidity also may lead to mold growing on various surfaces in your bathroom, including the ceiling and the grout between the tiles. I have a bathroom that gets quite steamy, even with the window open and extractor fan on. Bubbling paint on your bathroom's ceiling can lead to or indicate the possibility of some health risks for anyone who uses your bathroom. Levelled out with Tourpret filler. Paint peeling off Bathroom Ceiling!!! The only paint left on the wall should be firmly stuck to the wall. The first step in repairing your bathroom walls and ceiling is removing the chipped spots. It will peel at some point. Twice, I have scraped off the peeling bits. Painting over cracked paint without correct preparation results in an uneven surface and peeling paint within a fairly short time. If you don't mind a little hard work and mess, you can deal with that cracked paint and have a smooth and durable bathroom paint job. Levelled out with Tourpret filler.

What to Do About Peeling Paint STEP 1: Purge the peeling. If your paint is peeling in there, it will take more than a new coat of paint to fix the problem. To prevent peeling, apply a coat of moisture-resistant primer (such as Kilz Kitchen & Bath Primer, available on Amazon) to the ceiling or walls before you add your mildew-resistant paint color.
It is a very common mistake to sand and repair the areas that are peeling and leaving the rest, but the problem is that the paint left behind is a ticking time bomb. Paints made for bathrooms need to be able to withstand regular washing and cleaning without losing any of its luster. A moisture-damaged ceiling. If your ceiling is sheetrock or lathe and plaster follow these simple steps to repaint your ceiling and give it a fresh, new look.

Humidity is your enemy in the bathroom.
Bubbling or blistering in newly applied paint is often an indication of a problem with the bond between the new coating and the wall or ceiling surface. See photo attached.

Peeling, Cracking. The first step in repairing your bathroom walls and ceiling is removing the chipped spots. Apply it in a thin layer. This is a horrible job on a ceiling, so make sure you wear a dust mask and protective glasses for your safety.