Blistering are bubbles cause from the loos of adhesion and lifting of the paint film from the underlying layer.

Interior paint blistering can be cause by applying oil-based paint over a damp or wet surface, moisture seeping into the home from the exterior walls and exposure of latex paint film to high humidity or moisture shortly after paint has dryed.

Removing blistering from the surface is essential while fixing this issue. If not properly fix it will reappear followed by peeling.