Metal roof color chalking and fading

Metal roofing offers considerable advantages over traditional roofing materials (asphalt, tile, and cement). In addition to outlasting other materials, metal roofing systems are more affordable and aesthetically pleasing for both residential and commercial buildings. The most attractive feature is that the metal roof is available in a variety of colors, and it is very important to choose the right color.

Most homeowners have the impression of fading and peeling metal roof coatings, but don’t pay enough attention to the dangers of peeling paint. We want to help you become familiar with the different paint properties, especially with regard to chalking and fading.

What is Metal Roof Fading?

If you are using a metal roof, you will gradually notice that the color of the roof is getting lighter! This is fading.

Paint fades when factors such as moisture, pollutants, and chemicals in the atmosphere and the environment react with the paint. This change usually shifts the color towards white. In addition, the paint on the metal panels does not fade evenly, but each part is exceptionally fast.

No matter what kind of pigment or resin, the color will not be permanent in an outdoor environment. But there are ways to extend the life of your roof color, starting with understanding the fading factors, the type of resin, and the degree of fading.

Factors Affecting Metal Roof Fading

UV or Sun Exposure – Metal roofs or siding can fade due to UV exposure. The degree of fading is related to the intensity and time of exposure to UV light.

Temperature – While any temperature can cause fading to occur, extreme heat or cold can speed up the process. And frequent hot and cold alternation will speed up fading.

Moisture – Moisture is everywhere, whether it’s rainy, snowy or arid areas. The resin can protect the pigment, but the protective effect is quickly lost under constant contact with water. Acid rain or harmful chemicals in the environment can also affect fading.

Please note: Many roofing contractors offer warranties that do not cover metal roofs within a certain distance of shorelines, swamps, or bays.

Pigment – Paint on metal comes in two types:

  • Organic – Natural pigments composed of petroleum compounds, carbon-based are more prone to fading. Organic dyes create the brightest and most vivid colors.
  • Inorganic (Ceramic) – Pigments made from mineral compounds. It is more resistant to fading than organic pigments.

Resin – Premium is a common substance used to protect pigments and increase durability. Resins can also combine more coating systems with metal substrates, such as stone-coated steel roofing.

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