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Paint makes things prettier and more interesting and exciting. The newly painted home gives a sense of freshness, newness, cleanliness and sense of completion. However, the deterioration of the paint earlier to its rated life is considered as a failure of the paint. Painters and site supervisors should thoroughly understand the causes of defects and preventive measures to check the common defects that occur at different stages of the life of the paint.
Several defects like chalking, flaking, wrinkling, etc. are observed in painting, either during painting or sometimes after the painting. These defects arise either due to chemical attacks, the effect of atmosphere, sunlight, heat, humidity and dust or individually or jointly deteriorating it. Among them, cracking is defect the most commonly observed.
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Cracking is the chipping of paint film which is due to the cracks developing throughout the entire paint system and extending right down to the original surface. It is often visible on both exterior and interior surfaces. It occurs due to inadequate surface preparation, using a low quality of paint, etc. We have already discussed causes of cracking defect in our recent article. The solution to prevent flaking defects same as the cracking.
Precautions to Prevent Cracking/Flaking on Painted Surface:
- Before paint application, ensure that the surface is completely clean and dry.
- Do not use low quality paint, resulting in inadequate adhesion and flexibility.
- Do not paint in direct sunlight.
- Avoid painting interior or exterior surfaces when the temperature is too cold.
- Late afternoon painting in unheated areas is not recommended because the temperature will continue to decrease during the night and prevent proper paint film formation.
- When you are applying a second coat of paint, make sure the first coat is completely dry. Give proper drying time. Preferably 1 full day and minimum 8 to 12 hours.
- Always make sure that you have the right paint for the job. i.e. metallic paint is for metal surface, floor paint is for flooring, etc. Similarly interior paint for interior surfaces and vice versa.
Tips for Fixing or Repairing Cracking/Flaking:
- If the cracking does not go down to the underlying surface, remove the loose paint with a scraper or wire brush, sand it to feather the edges, prime any bare spots and repaint it.
- If the cracking goes down to the underlying surface, remove all of the paint by scraping, sanding and/or using a stream of heat by machine; then prime it. After that repaint with good quality exterior water based paint.
- If the cracking occurs over plywood, only regular scraping, repriming and recoating will solve the problem. Latex paints fill plywood cracks better than oil-based paints.
Painting defects generally arise because of taking shortcuts or missing issues that need to resolve before painting. So always make good surface preparation. Good preparation takes time and efforts. Don’t shortcut it. Don’t forget in life also short cut will cut you short.