The facade of this agricultural commercial building in Hoog Karspel was severely chalked. A white discoloration was observable on the coating layer, where the intensity of the color gradually fades, often resulting in visible stains and run-off lines. This is most common on roofs and facades with high pigment colors such as white, blue, red, yellow, and anthracite. The causes are diverse, but environmental factors such as UV radiation and excessive pollution are often the culprits. Additionally, poor maintenance, such as insufficient cleaning of the building or cleaning with incorrect products, is also a common cause. This commercial building was first thoroughly cleaned with special products and then recoated!