Cracking or flaking is the splitting of a dry paint film. This is a problem that needs fixing as it can lead to complete failure of the paint. Initially, the problem appears as a hairline crack, before evolving to flaking of paint chips.
Cracking and flaking is caused by:
- Use of a lower quality paint that has inadequate adhesion and flexibility
- Over thinning the paint or spreading it too thin
- Poor surface preparation, especially when the paint is applied to bare timber without priming
- Painting under hot or windy conditions that make water-based paints dry too fast
If caught early, it may be possible to correct superficial cracking by simply removing the loose or flaking paint with a scraper or wire brush, sanding to feather the edges, perform necessary repairs and spot- prime any bare spots before top coat application. However, if the cracking extends to the substrate, remove all affected paint by scraping, sanding and/or using a heat gun prior to painting.
More problem solving advice
If you’ve noticed black, grey or brown areas on your painted surface, chances are you’re dealing with a mould problem. For each problem you’ll find a guide to identifying it, its causes and solutions.