Moisture blistering can be caused by the migration of water through an interior wall to the exterior, thus pushing the paint off of the surface.

Inferior Products Due to the porous properties of concrete and its use in exterior or below-grade applications where water is usually present, general house paint or other types of all-purpose primers and paints are unsuitable for concrete. If the paint has also bubbled in a previous coat, remove those bubbles as well. Some of the factors leading to high exterior moisture levels include clogged gutters, worn-out caulking, heavy rain or snow, migration of high moisture from an interior wall, leaking roofs and paint that was applied to previously damp

Bubbling paint is usually caused by dirt underneath the paint, failing to prime a wall or painting over a damp area.

Remove any gypsum based materials on the interior wall and replace with traditional lime plaster that is less sensitive to moisture. This can happen when paint is applied to the wall that has not been dried out As the .

Oil and dirt on the surface of the wall: Presence of oil and grease, like that found on kitchen walls, can prevent the paint from bonding with the surface being painted.

Moisture blistering can be caused by the migration of water through an interior wall to the exterior, thus pushing the paint off of the surface. Check there’s enough room under the floorboards for moisture to evaporate from the soil below and pass out through sub-floor wall vents. Removing the source of moisture may alleviate or remove the formation of paint blisters on concrete. “Blistering” is the formation of “bubbles” in the exterior decorative paint film, resulting from localised loss of adhesion and subsequent lifting of the existing paint film from the underlying surface. Cover with a top coat of casein paint – milk paint mixed with 1 percent boiled linseed oil. POSSIBLE CAUSE. Application of oil-based or alkyd paint over a damp or wet surface.

If the paint has blistered because of moisture, then remove the source of the moisture, if possible.

Check the Bubbles caused from a loss of adhesion and lifting of the paint film from the underlying surface. Heat blistering caused by painting in direct sunlight on a surface that is too warm.

The moisture from the soil and garden beds behind the retaining wall will pass through the wall and attempt to escape through the paint coating on the exposed surface. Bubbled paint on a ceiling can have several different causes. If the hydrostatic pressure is too high then the moisture will be unable to escape effectively or quickly enough resulting in the formation of blisters.

Moisture in the walls: Bubbles can form if the surface being painted is moist when the paint is applied.