How Roof Coatings Extend The Lifespan Of Your Metal Roof

February 23, 2024


Metal roofs are renowned for their durability, longevity, and resilience, making them a popular choice for commercial and residential buildings alike. However, even the sturdiest of metal roofs can fall prey to the elements.

Over time, exposure to sun, rain, and temperature fluctuations can degrade a roof’s integrity, leading to costly repairs or replacements. This is why professional roofing contractors recommend roof coating as a game-changer.

Replacement or frequent repairs not only hit the wallet hard but also significantly disrupt business operations or home life during the renovation period.

That is why, in this blog, we will discuss how roof coatings can extend the lifespan of your metal roof, making it an excellent investment for both the short and long term.

What Are Roof Coatings?

Before we dive into the benefits of roof coatings for metal roofs, let’s first understand what they are. Roof coatings are liquid-applied membranes that are designed to protect and extend the life of your residential or commercial metal roof.

They are typically made from various materials, such as acrylics, silicones, polyurethanes, and asphalt. These coatings provide a seamless barrier that shields your roof from harsh weather conditions, UV radiation, and other environmental factors that can cause damage over time.

Types Of Roof Coatings

There are several types of roof coatings available on the market, each with its own set of characteristics and advantages. Some of the most common types include:

  • Acrylic Coatings: Known for their durability and flexibility, acrylic roof coatings offer excellent protection against UV rays and water damage. They are also highly reflective, which can help reduce energy costs by keeping your building cooler during the summer months.
  • Silicone Coatings: Silicone roof coatings are highly resistant to UV radiation and extreme temperatures, making them ideal for harsh climates. They also provide excellent waterproofing properties and are resistant to mould and mildew growth.
  • Polyurethane Coatings: Polyurethane roof coatings are known for their exceptional durability and adhesion properties. They form a tough, seamless membrane that can withstand foot traffic and other mechanical stresses.
  • Asphalt Coatings: Asphalt roof coatings are made from bitumen and provide superior waterproofing and UV protection. They are commonly used on low-slope roofs and can extend the life of your roof by decades.

Benefits Of Roof Coatings For Metal Roofs

Enhanced Durability

Metal roofs are known for their longevity, but they can still be susceptible to rust, corrosion, and other forms of damage over time. Roof coatings provide an additional layer of protection that helps shield your metal roof from these environmental hazards, extending its lifespan significantly.


One of the most common problems with metal roofs is water leakage. Over time, seams and joints can deteriorate, leading to water infiltration and potential damage to your building’s interior.

Roof coatings create a seamless barrier that prevents water from seeping through, keeping your property dry and free from water-related issues.

UV Protection

Weather conditions can severely affect your roofs. UV radiation from the sun can cause metal roofs to fade, warp, and deteriorate prematurely. Roof coatings with UV inhibitors help reflect sunlight away from the surface, reducing heat buildup and preventing damage to the underlying metal substrate.

This not only extends the lifespan of your roof but also helps maintain its aesthetic appeal.

Energy Efficiency

By reflecting sunlight and reducing heat absorption, roof coatings can significantly improve the energy efficiency of your building. This can lead to lower cooling costs during the summer months and create a more comfortable indoor environment for occupants.


Compared to traditional roof replacement or repairs, applying a roof coating is a cost-effective solution for extending the life of your metal roof. It requires minimal labour and downtime, which means you can avoid the high costs and inconvenience associated with a full roof replacement.

Environmentally Friendly

Roof coatings are environmentally friendly alternatives to traditional roofing materials. They can be applied directly over existing roofs, reducing the need for tear-off and disposal of old materials.

Additionally, many roof coatings are low-VOC (volatile organic compound), making them safe for the environment and occupants.

How Roof Coatings Work

Surface Preparation

Before applying a roof coating, proper surface preparation is essential to ensure adhesion and longevity. This may involve cleaning the surface to remove dirt, debris, and contaminants, as well as repairing any damaged areas or defects.


Roof coatings are typically applied using a spray, brush, or roller, depending on the type of coating and the size of the roof. Multiple coats may be necessary to achieve the desired thickness and coverage.

It’s important to follow the manufacturer’s instructions and recommendations for application to ensure optimal performance.

Curing And Drying

Once applied, the roof coating needs time to cure and dry properly. This process may take several hours to a few days, depending on the type of coating, weather conditions, and environmental factors.

It’s important to allow sufficient time for curing before exposing the roof to foot traffic or adverse weather conditions.


Regular maintenance is key to maximizing the lifespan of your roof coating and ensuring continued protection against the elements. This may include periodic inspections, cleaning, and recoating as needed to address any signs of wear or damage.

Choosing The Right Roof Coating

With so many options available, choosing the right roof coating for your metal roof can be overwhelming. Here are a few factors to consider:

  • Climate: Consider the climate and weather conditions in your area, as certain coatings may perform better in extreme temperatures or high humidity.
  • Roof Condition: Assess the condition of your metal roof and any existing coatings or treatments to determine the best course of action.
  • Budget: Determine your budget and weigh the cost of different coating options against their benefits and longevity.
  • Warranty: Look for roof coatings that come with a manufacturer’s warranty to provide added peace of mind and protection against defects or premature failure.

About Us

Stahl Roofing has been providing top-quality roofing solutions to homeowners and businesses across Canada for over a decade. With a team of experienced professionals and a commitment to customer satisfaction, we take pride in delivering reliable, efficient, and affordable roofing services tailored to meet your needs.

Contact us today to learn more about our services and how we can help you protect your investment and ensure the longevity of your roof.