A commercial roof coating is an option for repairing or restoring an existing roof. Restoring an existing roof is an environmentally friendly option because it reduces landfill waste and improves the environment. Some coatings contain ultra low or zero VOCs and qualify for the US Green Building Council LEED program. These programs emphasize sustainable site development, energy and atmosphere, and materials and resources. Here’s a brief comparison of the benefits and drawbacks of each type of commercial roof coating.
Butyl roof coating
When deciding between butyl and other types of roofing materials, consider how long the new roofing system will last. Butyl has an extremely high elongation value and high tensile strength, two properties that are essential in the life of a roof. It is also extremely flexible and strong, and it can resist standing water and thermal cycling. While it is an excellent choice for low-slope roofs, butyl is not without its disadvantages.
Butyl is a type of elastomeric coating and is particularly useful for commercial and industrial buildings. It contains a mindewcide that will keep out mildew and mold, allowing your roof to last for years longer. It’s also corrosion resistant, so butyl is ideal for marine environments. This roof coating can be applied to both elevated and ground-level steel storage tanks.
Acrylic roof coating
Acrylic roof coatings form a seamless watertight membrane over the entire roof, reducing leaks and preventing damage from sunlight. They are also energy-efficient, highly reflective, and contain no VOCs. These coatings are also compatible with a variety of roof systems, including bitumen, foam, metal, and gravel. Listed below are the benefits of acrylic roof coatings. You may want to consider an acrylic roof coating for your commercial property.
As an acrylic is water-based, application can be quick and easy. Installation teams will rarely experience equipment difficulties, ensuring a quick and efficient job. Acrylic roof coatings can also extend the life of built-up roofs. These coatings also protect the interiors of buildings by reflecting UV rays and providing energy-efficient reflectivity. However, they are not recommended for flat or cement roofs. Unlike silicone and elastomeric roof coatings, acrylics tend to lose their luster over time.
Fluoropolymer roof coating
Typically, fluoropolymer coating systems consist of a specialized primer and a top coat of fluoropolymer. The fluoropolymer coating is applied in a thin layer to metal roofing panels and cured in a factory. The coating is durable, withstands dirt pick-up, and maintains solar reflectance. Unlike traditional polyurethane coatings, fluoropolymers are not prone to fading or weathering and can be applied over existing paint finishes. Commercial roofs require a sloped roof to be suited for this coating.
The fluoropolymer commercial roofing system offers a broad spectrum of color choices, as well as a range of properties that extend its lifespan. A fluoropolymer roof is also UV and chemical resistant. It is an excellent choice for roofing applications that face a variety of challenges. In fact, it is the most durable commercial roof coating on the market. The benefits of this coating are numerous.
Silicone roof coating
Installing a silicone roof coating can be a tricky process if the equipment used is not properly maintained. The video below shows the process of applying silicone over a variety of substrates. Because silicone coatings can be very slippery, it is important to clearly mark any pedestrian traffic areas with paint, chalk or stickers. Fortunately, the Building Code allows for recoating an existing roof over a silicone coating without requiring a replacement.
There are several benefits to silicone for commercial roofing. First, it’s less expensive than acrylic, is faster to apply, and resists ponding water better. However, silicone’s lower tear strength and dimensional stability make it less durable than acrylic. This means that silicone is more likely to tear easily when stressed, and it won’t retain its reflective qualities after years of use. It can also be damaged by harsh chemicals and foot traffic.