Metal Roofs - What should you do when it is time to paint?

Metal roofs are gaining popularity in Florida and the southeastern United States, not only for their durability against hurricane winds but also for their stylish appearance, reminiscent of beachfront vacation homes. Nowadays, metal roofs can be seen on a variety of houses, from country homes to suburban ranch-style residences. However, along with the benefits of metal roofs, there comes a need for maintenance.

Metal roofs are typically coated with a protective layer, often a factory-applied powder coating that provides both protection and a wide range of color options. Over time, this coating can wear away, exposing the underlying material or losing its original color and luster. In such cases, repainting the roof becomes necessary to restore its appearance or even change its color entirely. Before embarking on a metal roof repainting project, there are a few important considerations to keep in mind to ensure a successful and long-lasting outcome.

To begin, ask yourself these questions:

1) Can you safely walk on the roof? Metal roofs can be slippery under wet or dry conditions, and some may not support the weight of a person, potentially leading to damage.

2) Is the roof steep enough to require professional assistance?

3) Does the roof only require cleaning? Sometimes, what may appear to be wear and tear could simply be stained from mildew or other organic residues.

Once you've decided to repaint the roof, follow these recommendations for a successful metal roof repainting project:

1) Pressure wash the roof using only water—no need for chemical cleaning agents.

2) Allow the roof to dry overnight to ensure thorough drying, especially in the seams where water may be trapped.

3) Apply a clear surface conditioner like Acrylux 3 to 1 Sealer. This step helps seal in any remaining chalk or oxidation after pressure washing, ensuring proper adhesion to various metal types such as aluminum, steel, galvanized, galvalume, and powder coating. If rust is present, treat it with Ospho and a rust-inhibitive primer before applying the 3 to 1 Sealer, as the sealer itself does not provide rust protection.

4) Let the surface conditioner dry for at least two hours before applying the top coating.

5) The ideal time to apply the finish coat, such as Acrylux Roof Gloss, a 100% Acrylic Roof Paint, is when the roof surface temperature ranges from 60 to 110 degrees Fahrenheit. In hot climates, it's best to paint in the morning when the surface is dry and free from dew or moisture. In cooler overnight temperatures, allow the roof to warm up, and pause painting when the surface temperature exceeds 110 degrees Fahrenheit.

6) For the most uniform finish, use an airless paint sprayer. Choose a tip width that covers the width of a roof panel and maintain a 50% overlap. Spray in long strokes along the panel's length, ensuring overlaps on the seams. Applying two coats is recommended for enhanced longevity.

7) Always select a dedicated, high-quality roof coating specifically designed for roofs. Acrylux Roof Gloss, for instance, surpasses regular DTM metal paints due to its high build, resistance to chalk, and protection against mildew.

By following these steps and choosing the right materials, your metal roof can retain its beauty and functionality for years to come.