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Metal Roof Coatings: Types, Best Products & Application Tips

Posted on : August 30, 2023

Metal Roof Coatings: Types, Best Products & Application Tips

There’s a reason why industry professionals highly recommend adding a coating to your metal roof. These protective solutions are developed to rejuvenate and extend the lifespan of existing roofs, new and old.

If you are exploring your options, you have come to the right place. In this detailed guide to metal roof coatings, we will discuss the different types, top products, and essential application tips that can make all the difference.

Let’s start at the beginning by understanding the role of roof coatings.

Why Do Metal Roofs Need An Extra Coating?

You might be wondering why you need to coat your metal roof in the first place. So let’s find out what a proper coating will do for your home.

Preservation Against the Elements 

Metal roofs, while sturdy and durable, are exposed to all kinds of weather every day of the year. From scorching sun to severe rain and gusting winds, these roofs stand tall as the primary protection for your home. However, over time, this continuous exposure can take its toll, leading to rust, corrosion, and even premature wear.

This is where metal roof coatings come in. These coatings act as an additional shield, standing between your metal roof and the elements. They create a barrier that prevents moisture from infiltrating and rust from forming. 

Embracing Energy Efficiency

In an age where homeowners are prioritizing sustainability and energy efficiency more, metal roof coatings rise to the occasion. As UV rays relentlessly beat down on your roof, temperatures inside can rise. Without proper insulation, this heat can force your air conditioner to work overtime in an attempt to keep interior temperatures steady.

Here's where reflective coatings come into play. These coatings are designed to reflect a significant portion of the sun's radiant energy, preventing excessive heat buildup. By doing so, they reduce the workload on your cooling systems, translating to lower energy consumption and reduced utility bills. Not only do these coatings protect your roof, but they also contribute to a greener and more cost-effective environment.

Extending Longevity and Value

Investing in a metal roof is a decision that pays off in the long run. These roofs are celebrated for their durability and low maintenance requirements. However, even the sturdiest structures can benefit from a little extra care.

Roof coatings aren't just about the present, they're an investment for the future. By coating your metal roof, you are effectively extending its lifespan. The protective layer shields your roof from the harsh elements, minimizing wear and tear. This means fewer repairs, less frequent replacements, and ultimately, a higher return on your investment.

Also read: How long do metal roofs last

Variety of Color Choices

Your roof isn't just a necessity, it's an expression of your style and personality. And what better way to showcase your aesthetic preferences than by choosing from an array of colors and finishes? Metal coatings are available in a variety of choices that extend beyond the usual whites, blacks, and grays. From bold reds to serene blues, there is an option for every home aesthetic.

But it's not just about looks, color choice can impact functionality too. Lighter shades reflect more sunlight, reducing heat absorption and supporting energy efficiency. So, whether you're aiming for rustic charm or a modern appeal, your chosen coating will allow you to infuse your personal touch while still reaping practical benefits.

Also read: 8 Metal Roof Colors to Brighten Up Your Home

Unveiling the Best Coatings for Metal Roofs

An acrylic, silicone or PVDF coating are all great options, whereas other coatings like polyurethane might not be the best choice. 

1. Acrylic Roof Coatings

Acrylic coatings are generally considered the best for metal roofs, as they are a flexible and cost-effective solution that can seamlessly adhere to various metal surfaces. Acrylic coatings are celebrated for their exceptional UV resistance and ability to reflect sunlight, effectively reducing the building's cooling costs. Perfect for climates that experience intense sun exposure, these coatings create a barrier that shields your roof from the elements while offering a range of colors to match your aesthetic preferences.

2. Silicone Roof Coatings

Silicone coatings possess incredible restorative properties, as they can recover from minor damage caused during installation or adverse weather. Beyond their restorative nature, silicone coatings boast exceptional water resistance, making them perfect for roofs that often face rain and standing water.

3. Polyvinylidene Fluoride (PVDF) Coatings

For those who want the pinnacle of performance, PVDF roof coatings step up to the plate. Recognized for their exceptional color retention and resistance to fading, chalking, and corrosion, PVDF coatings are often found on high-profile architectural projects. They have the ability to maintain a pristine appearance for decades.

Now that we have gone over some common coating types, let's dive into some of the best products available in the industry.

Top 3 Metal Roof Coatings In 2023

Here are the top three coatings that we recommend for metal roofs:

1. ROCAcrylic Direct-To-Metal Acrylic Enamel 3800 by Rust-Oleum

ROCAcrylic Direct-To-Metal Acrylic Enamel

With the perfect balance between cost-effectiveness and exceptional performance, this Rust-Oleum acrylic metal roof coating is a great option. This particular coating has garnered a dedicated following among property owners and professionals due to its impressive UV resistance and user-friendly application process. Its excellent adhesion properties make it suitable for many types of metal surfaces. Whether you're pursuing a flawlessly smooth and enduring finish or in need of comprehensive corrosion protection, this product proves to be a reliable solution.

2. GacoFlex S20

GacoFlex S20 metal roof coating

This 100% silicone roof coating is perfect for any type of roof, including various metals, and guarantees to provide a leak-free and protective coating. GacoFlex S20 is resistant to rain and ponding water just two hours after being applied. Its glossy finish enhances its reflectivity, reducing heat absorption, energy costs, and wear from UV rays. With a one-coat application and fast drying time, this coating is perfect for DIY enthusiasts who want a durable but simple solution for their roof.

3. Fluropon® Premium Paint-Based Protective Metal Coating

Fluropon metal roof coating stands as a pinnacle of quality for metal wall panels and roofing. Engineered with a cutting-edge 70% PVDF composition, it surpasses industry norms, guaranteeing remarkable UV resistance, strong adhesion, flexibility, and malleability. Its lasting color vibrancy is due to the acrylic pigments designed by Sherwin-Williams®, which also resist dirt and staining. This coating is compatible with many different substrates, including aluminum, galvalume, aluminum-zinc alloy, and galvanized steel.

Roof Coating Tips for a Seamless Transformation

Here are some valuable application tips that will guarantee your roof coating project is a resounding success.

1. Surface Preparation is Key

Before you even think about cracking open that can of coating, ensure your metal roof is primed for perfection. Thoroughly clean the surface to remove dirt, debris, and any existing coatings. Clean panels ensure proper adhesion and longevity of the coating.

2. Choose the Right Weather 

Timing is everything when it comes to application. Aim for a day with moderate temperatures and minimal humidity. This will allow your roof’s coating to cure properly and form a strong bond with the metal surface.

3. Invest in Quality Tools

Quality brushes, rollers, and spray equipment can make a world of difference in achieving a smooth and even application. The right tools are an investment in the final result.

4. Follow Manufacturer's Guidelines

If you are opting to apply the coating yourself, it might sound like a no-brainer, but following the manufacturer's instructions is crucial. From mixing ratios to application techniques, these guidelines are designed to optimize your metal roof coating's performance and lifespan.

5. Choosing a Reputable Metal Roofing Contractor

While the coating itself is a pivotal part of the equation, the hands that apply it can determine the success or failure of your roofing project. Seek out local roofing contractors with a strong reputation for quality work and substantial experience with metal roofs. This ensures that the workers are equipped to handle any issues that may arise.

6. Regular Maintenance is a Must

After your roof coating project is complete, make sure to follow a proper roof maintenance plan with seasonal inspections to prevent damage and costly repairs. This will ensure your investment continues to shine for years to come.

If you’re a homeowner in Pennsylvania and are ready to protect your home and metal roof with a coating, our team at McClellands Contracting and Roofing is here to help.

Get Expert Guidance on Metal Roof Coating and Maintenance in Pennsylvania

At McClellands Contracting and Roofing, we are a locally owned and operated company with years of experience installing and maintaining metal roofing systems. We're more than your contractor – we're your partner in preserving and enhancing the beauty and durability of your home. 

If you are looking for metal roof coating services in Pennsylvania, our team is ready to be your guide. Call us at (412) 353-5660 and schedule your free consultation with our metal roofing experts. Let’s ensure the longevity of your roof by adding a protective coating today.

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