![]() Cheaper-quality exterior paint was used, containing high levels of pigment extenders.When chalking gets severe, it may run off and stain the surrounding construction. Chalking is especially common with very light-colored flat paints, especially lesser quality oil-based paints containing high levels of pigment extenders. Chalking is actually the paint pigment released by the paint binders that have been broken down by exposure to the weather. In dry arid climates where there is little rain, chalking can become excessive. Although some chalking is a normal way in which paints self-clean when exposed to the sun and rain, excessive chalking can indicate paint failure. ![]() Let completely dry, then prime and paint with a high-quality latex house paint.Ĭhalking is identified by the fine chalky powder that forms on the surface of a paint film. Then clean the area with a trisodium phosphate cleaning solution and rinse with clean water.
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