Paint is basically a liquid material. For most of the people, paint is the colour on walls, timber, metal, bricks or outside/inside surfaces of their house. Once you paint, several defects are observed. The defect arises as paint film is subjected to the chemical attack of atmosphere, sunlight, dust, and heat, all deteriorating it. The defect may also arise due to poor workmanship or poor material used.
Peeling of paint is one of the several defects on painted surface. The paint film is subjected to chemical attack of atmosphere, sunlight, dust, and heat, all deteriorating it.
Also Read: What is Efflorescence in Paint?
Peeling of paint occurs on walls as well as on wooden or metal surface. It is mainly caused by moisture on the surface, poor surface preparation, using an incorrect painting system. It is the swelling of paint film that is due to localised loss of adhesion between one or more coatings or between primer and parent surface and moisture on the surface.
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Peeling of paint occurs due to two reasons, moisture on surface and poor surface preparation and in lot of cases poor surface preparation by the previous painter. Applying new paint film may not improve the adherence of the old paint film. Somewhat it might make it worse due to the already imparted stresses when new paint film dries out.
Peeling of paint occurs due to other various reasons:
- Peeling of paint film occurs in non-porous coatings i.e. oil based paints, enamels
- Due to moist air, oily or greasy surface, or imprisoned gases between the painted surface and the paint film, which expand under the influence of heat
- Poor adhesive quality of paint
- Too much varnish in the paint
- Paint applied on wet condition (especially painting carried out during monsoon)