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February 3, 2021

Metal Roofing Paint—Chalking and Fading

Standing Seam Roof Panels-Wagner Metal Supply-Metal Roofing Paint
How are Ag Panels Made at Wagner Metal Supply

Metal roofing paint coatings are designed to stand up against the elements and look incredible for decades. A metal roof is often referred to as a lifetime roofing system. However, like all materials, the integrity of the metal roof will begin to deteriorate after its given lifespan. If you are concerned about your newly installed metal roof deteriorating early—no need to worry! In the Wagner Metal Supply product warranty, it guarantees the paint system on the metal panels will not chalk, fade, or lose adhesion during its lifespan. What exactly does this mean? We pride ourselves on the customer education we deliver. We are here to do just that! In the following paragraphs, we will thoroughly discuss what our Lifetime Limited Paint Warranty refers to.

Chalking and Fading in Metal Roofing Paint

Chalking and fading occurring in metal roofing panels are only common after their given lifespan. With the right coating system—the paint on your metal roof should look stunning for years! Chalking and fading are frequently discussed in paint warranties. What exactly is chalking and fading, and what is the difference between the two? When we pick apart this subject, we are referring to what happens to a paint coating system over time. There are three common ways a paint system will deteriorate.

  • Chalking

Chalking is caused by the paint resin degrading over time. Have you ever run your finger across an old metal building that left a dusty residue? Chances are that the metal panels are chalking.

  • Fading

Fading directly affects the pigment of the paint. We are strictly talking about the color of the paint and how it loses vibrancy over time.

  • Loss of paint adhesion

Loss of adhesion is referring to how well the paint coating system is bonded to the substrate. Cracking or peeling of the paint is caused by loss of adhesion over time.

How Long does Metal Roofing Paint Last?

This is one of the most common questions that come about in metal roofing. This question can only be answered based upon the paint formula you are dealing with. All paint coating systems are not created equally! Metal roofing panels manufactured from Wagner Metal Supply come pre-coated in the premium paint coating system Weather XL™. This is an exclusive Sherwin Williams paint coating system. It is a silicone-modified polyester formula (SMP). This formula will look fantastic for years to come and deliver protection at the same time. Wagner Metal Supply offers customers a 40-year warranty to guarantee the original paint coating system will not chalk, fade, or lose adhesion.

Wagner Metal Supply- Color Pallet (1)
Wagner Metal Supply- Color Pallet (1)

Elements that Deteriorate Metal Roofing Paint

F.A.Q

1. Can I paint over my metal roof?

Wagner Metal Supply does not recommend customers to paint over their metal roof due to the fact it will interfere with our product warranty. Our product warranty only covers the original paint coating system applied to the metal panels prior to installation.

2. What kind of formula is the WeatherXL™ paint coating system by Sherwin Williams?

WeatherXL™ by Sherwin Williams is a silicone-modified polyester formula (SMP). This formula will look fantastic for years to come and deliver protection at the same time.

3. What elements deteriorate the paint on a metal roof?

Three major elements contribute to metal roof paint deterioration—heat, light, and moisture. Extensive heat beating down on a metal roof will begin to impact how the paint formula performs. UV lights are just as damaging to our metal roofs as it is to our skin. Metal roof paint formulas typically have a composition that deflects UV rays, but it will begin to naturally degrade as the roof ages. Lastly, we have moisture. Think of the moisture impact the same way you would think about washing your favorite red shirt. It remains vibrant for the first few washes, but it will eventually fade in color.

4. What is chalking and fading on a metal roof?


Chalking is caused by the paint resin degrading over time. Have you ever run your finger across an old metal building that left a dusty residue? Chances are that the metal panels are chalking. Fading directly affects the pigment of the paint. We are strictly talking about the color of the paint and how it loses vibrancy over time.