10 TYPES OF PAINT PROBLEMS....
Chalking is identifiable as a fine chalky powder . Exposure to the sun and rain, excessive chalking can be a paint failure. Chalking is actually the paint pigment released by the paint binders which have been broken down by exposure to the weather. This paint problem is due to:
-Not properly sealing a porous surface before painting.
Bubbling defined as “a globular body of air or gas formed within a liquid: air bubbles rising to a surface.” Bubbling paint is identified by different sized bubbles formed under the paint due to:
- Painting when the concrete is damp causing trapped moisture to expand the paint.
- Interior moisture escaping through the walls due to improper interior ventilation.
- Not properly sealing a porous surface before painting.
Mildew is a fungus feeding and growing on the paint and is identifiable by its grey, brown, green or dark black "splotchy" spots. This is due to not priming the surface properly before painting and applying paint on damp surface.
Sagging of paint is easily identified as a dripping look to areas of the paint. Its potential cause is that paint surface was not clean or properly prepared at the time of application.
Cracking is a failure of paint by splitting of a dry paint. In its early stages, the problem appears as hairline cracks, this is due to natural aging of several layers of based paint and later on turns into flaking of paint.
Effloresence is identifiable by crusty white salt deposits that bubble through the paint from a masonry structure. Salts in the concrete become dissolved with water and then leach to the surface as the water evaporates. This happens when:
- there are cracks in masonry wall;
- Poor paint surface preparation where prior efflorescence was not entirely removed and washed before the surface was repainted.
- Heavy moisture migrating through exterior masonry walls
Peeling paint is a very common paint problem but can be caused either by moisture or poor adhesion. Peeling due to poor adhesion is characterized by the paint peeling and separating from an earlier paint layer (intercoat peeling) or from the substrate leaving some paint behind. Its potential cause is painting over a surface with poor surface preparation such as being dirty, wet or using inadequate primer.
8. POOR ALKALI RESISTANCE
Surface with poor alkali resistance will eventually lead to color loss and overall deterioration of paint . This is due to applying paint on surface that is not properly cured/ sealed. In other cases, sometimes this is due to structures near salty water. ( The concrete absorbs salt and will pull the moisture out of the air causing the paint to fail.)
Wrinkling is like a rough, crinkled paint surface. Its possible cause are application of paint on contaminated surface such as: dirt, wax , damp.
10. FADING OF COLOR
Fading of color is an excessive lightening of the paint color from its original color. This is due to application of paint to alkaline masonry without primer or sealer.