How to Fix a Bubbling Ceiling in Bathroom

Remove the paint by applying a gel paint remover with a bristle brush and letting it sit on the surface according to the package instructions. Wear gloves, goggles, a mask and a hat as you work to avoid getting paint remover on your skin if it drips down. Gel paint remover sticks to the surface better than other paint removers, so it is a good choice for ceilings.

Scrape the paint off with a wide putty knife. Wipe the blade off on old towels or paper towels as you work, to contain the mess. Continue working until all the paint is removed.

Neutralize the paint remover, according to package instructions. Vinegar or a commercial neutralizer are often recommended. However, some gel paint removers are organic, and you only need to wash it off with plain water. Let the ceiling dry thoroughly.

Wash the ceiling with a solution of 1 cup of bleach per 1 gallon of water to kill any mold or mildew that is forming. Allow it to dry completely.

Apply a primer designed for high humidity areas to the ceiling, using sponge rollers with extension rods and a bristle brush for around the edges. Oil-based primer works well on ceilings, but many latex alternatives are available. Read the instructions on the primer before purchasing it to ensure that it is suited to moist bathrooms.

Allow the primer to cure according to package instructions. Do not add moisture to the bathroom by showering or bathing during this time. If the primer does not cure long enough or gets too moist, bubble occurs. Follow the package instructions. Oil-based primer can take several days to cure, while some latex paint is ready in under 24 hours.

Paint the ceiling as you did with the primer. Use a sponge roller with an extension rod and bristle brush to cut in the paint. Allow the paint to cure according to the package instructions. Apply a second coat. Use a paint that is compatible with your primer. Oil-based primers work with both latex and oil-based paint if you buy compatible products.