Paint is used for several purposes in construction—aesthetic, weather protection, and waterproofing or increase durability. Painting can be done on the interior or exterior wall surface and the durability varies based on various factors.
The exterior walls of buildings are constantly exposed to long hours of sunlight, change in weather and moisture level. These produce free radicals in the paint film. Free radicals are molecules with unpaired electrons, which in pairing cause damage to other molecules. If left ignored, the protective properties of the paint will soon wears off, leaving the exterior surface expose to damages. The first sign of deterioration is the change in appearance—colour, gloss or chalking.
Cracking or flaking paint is one of the most common problems of interior wall paints. The inability of the paint film to cope with the heat and mass exchange between the air and walls is one of the main reasons why paint crack. Leaks in the wall can also pose a huge problem! A good paint job should last for 8-10 years.
When it comes to paints, it may be wiser to invest in better quality paint as the binder, pigment or formulations does determine the lifespan and durability of the paint. Maintain and repair at the first sign of deterioration before the problem gets out of hand. If you are unsure, always check with the professionals.