Does it matter what flat roof coating you use to protect your commercial roofing system? Yes, it does. Continue reading to discover the best roof coatings for metal roofs and a variety of other substrates.
A commercial roof coating is a particular type of fluid applied across the membrane of your roofing system. Its purpose is to prolong the service life of your roof by protecting it from leaks, sun damage, and ponding water. When applied properly, a roof coating dries into a protective layer that fends off damaging elements while restoring the curb appeal of the building.
So this raises the million-dollar question: what’s the best roof coating? The answer depends on the type of roof on your facility, your area’s climate, and the needs you have for your flat roof coating. What might be the best roof coating for metal roofs might not be the best for an asphalt system.
Whether you’re considering a silicone roof sealant or an asphalt emulsion coating, you want a solution that provides both short- and long-term benefits. Commercial flat roof coatings provide several advantages, including:
- Extending your roof’s lifespan by up to 20 years
- Avoiding the significant costs of full roof replacement
- Enhancing your roof’s protective barrier against wet weather conditions
- Improving energy efficiency and lowering utility bills
- Reducing repair and maintenance costs
Whether you’re installing a new roof or looking to add a layer of protection to your existing roof, the key to choosing a long-lasting and effective flat roof coating is making sure it meets the specific needs of your facility.
Elastomeric coatings are an effective and affordable solution for preventing roof leaks. They can be applied any time of the year, even in rainy or snowy weather conditions. This moisture-resistant roof coating is made with a blend of substances, including acrylic material and titanium dioxide pigments. One of its most significant benefits is that roofers can apply this finish to a wide range of roofs, including PVC, wood, polyurethane foam, single-ply, modified bitumen, concrete, built-up material, and metal roofs. As a roll-on roof sealer, elastomeric flat roof coatings are easily applied.
An acrylic coating contains multiple forms of acrylic polymer, a durable matter formulated to extend a roof’s service life. These roof coatings are available in various colors, but the most common option is a white reflective coating to protect against UV rays. Many roofing contractors agree that this is the best roof coating on the market due to its low cost and durability.
Roofers typically apply acrylic coats in two separate steps. After applying the first coat, roofing professionals run the second layer perpendicular to the initial layer. Acrylic flat roof coatings can be used as a roll on roof sealer, a flat roof spray sealant, a brush-on layer of protection, or even a squeegeed coating system.
Often referred to as a cutback coating, a solvent-based asphalt flat roof coating rests at an even roof temperature. Asphalt particles are “cut back” when liquified, which makes for a more straightforward application. Typically applied as a roll-on roof sealer, a single gallon of solvent-based asphalt coating can cover 100 square feet of your roof. There are three finishes available: asphalt black, aluminum, or reflective. Contractors must take precautions when applying these coatings to existing roofing because they contain asbestos, which can harm any raw materials used on your roofing system.
A silicone roof sealant is a biodegradable liquid rubber finish. Like most professional coatings, a silicone-based coat is applicable as a flat roof spray sealant or a roll-on sealer. As with many flat roof coatings, silicone roofing systems are available in various colors, most notably reflective white or a translucent shade, to provide maximum reflectivity and energy efficiency. However, that’s where the similarities end, because silicone coverings have two distinct advantages:
High solids silicone roof coatings provide superior moisture resistance compared to other roof sealants, since they’re engineered to wick more moisture for extended periods. There’s no need for a primer with a silicone coating. Additionally, silicone roof coating systems are durable enough to adhere to most existing roofing substrates.
These coatings are different from an asphalt-based layer. An asphalt emulsion is a water-based material formed with clay and a blend of organic and inorganic fibers. Each coating is available in black, brown, or reflective titanium. One of the most significant advantages of an asphalt emulsion is how easily roofers can apply it.
Many roofing companies prefer asphalt emulsions because the application process takes significantly less time. All you need to do is pour 1.5 gallons across the roof and use a push broom to cover the surface. Whether you need a roof coating for metal roofs, a restoration layer for EPDM, or a moisture-resistant barrier for an asphalt layer, consider asphalt emulsion.
Rainville-Carlson is more than an ordinary commercial roofing contractor. We’re problem solvers who go the extra mile to get the most out of your roofing system. From design to installation, our team of professionals has the tools and expertise to help you choose a flat roof coating that delivers long-lasting results.
Show your roof some TLC by applying the perfect coating to keep it in optimal condition. Schedule your free consultation today to learn more about our roof coating applications.