Weather-Proof Exterior Coatings

May 25, 2010

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Since weather conditions influence the success and performance of exterior coatings projects, exterior painting contractors make it one of the foremost considerations in selecting the appropriate coatings products for any project.

The climactic variables bring with them different weather conditions. Even regional geography has an influence on the weather systems.

For climate that produces high levels of UV rays, elastomeric-based or 100% acrylic paints can be used to protect cementitious surfaces. In areas where wind and rain are abundant all throughout the year, building exteriors are prone to water-induced substrate cracks. Elastomeric formulations with thicker films are often used in exterior finishes.

In high-altitude areas, the air is thinner. The sun’s rays are more intense as a result, and high-UV exposure is more frequent. Exterior stains of 100% acrylics are often used, because of their resin component that can withstand intense light and UV exposure.

Coatings applications work best between temperature ranges of 500 to 900 F. Air temperatures lower than this range can cause chalking and premature peeling in exterior finishes. High temperatures, meanwhile, can affect surface preparation, application and curing. On the other hand, fluctuating temperatures like those seen in freezing-thawing cycles require flexible primers and topcoats.

Despite the many climate variables, coatings manufacturers try to develop exterior coatings products that work well in every weather condition. They design products to work well with specific weather but can be appropriate for other conditions as well.

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