Solutions for Peeling Paint in a Bathroom

Causes

• Oil-based paints form an exceptionally strong bond, but they also create a solid film that doesn't allow underlying water vapor to escape. These paints may peel if the subsurface was not completely dry at the time of painting. Painting latex paints over old oil-based paints may also cause paint failure; the latex paint bonds to the brittle oil-based paint, pulling it off the wall. Other causes of peeling include using paint not suitable for bathrooms, not cleaning the surface thoroughly before painting and not painting a primer coat.

Removal

• The existing paint doesn't require complete removal before repainting. Use a scraper to remove any loose or peeling paint, but any paint that still has a good bond can remain in place. The painted areas that remain on the wall need sanding to roughen their surface and make them receptive to new paint. Applying a thin coat of wallboard compound will level out uneven surfaces. Oil-based paints in older homes may contain lead, so it's a good idea to wear a dust mask when working around these paints to prevent exposure.

Preventive Measures

• Install a vent in the bathroom to remove moisture and lower humidity. Some latex paints are especially vulnerable to water damage. Unlike oil-based paint, latex paint is breathable; humid air can get under the paint and interfere with adhesion. Use a paint that is specifically formulated for use in bathrooms. This type of paint has better resistance to moisture. Prepare the surfaces before painting to ensure a strong paint bond.

Repaint

• Even bathroom walls and ceilings that look clean may harbor dirt, soap and mildew. Wash the surfaces with a pre-painting solution to remove contaminants that interfere with paint adhesion. Spray the walls with a diluted mixture of bleach and water to kill any mildew present. The walls must be completely dry before applying the paint. Before painting, apply a coat of stain-blocking primer to improve the paint's bond to surfaces. Primers need time to cure, so it's important to follow the can's directions for how long to wait before covering the primer with paint. Paints, too, require a certain amount of time between coats. Applying the second coat of paint too soon or waiting too long can cause the paint to peel. Refer to the paint's instructions for the recommended re-coat times.