Cold-applied roof coatings are generally economical, well-tested and proven to have a long performance life. They are versatile and easy to use. When applied in a roofing system, they not only protect and reinforce the integrity of the roof they also seal and conserve the roof.
Roof coatings are available spanning a vast range of properties and consistencies targeted to satisfy a multitude of purposes. Low viscosity, non-fibrous coatings are formulated as penetrating primers and moisture-resistant coatings. Medium viscosity, fibrous and non-fibrous coatings are formulated as commercial, industrial, and residential ply adhesives and top coatings. These coatings can be mixed with pigments to enhance reflective properties thus developing a more resilient, energy-efficient roof. Highly viscous, heavily fibrous coatings are formulated to adhere waterproofing membranes and components as well as for patching and repairing leaks and holes.
There are numerous alternatives available for low-sloped roofing. However, building owners have often faced uncertainty in selecting the best system.
A long-term, economical roofing solution that is often overlooked is acrylic elastomeric roof coatings. Building owners and facility managers nationwide are realizing the lasting benefits of acrylic roof coating. These durable, liquid coatings prolong the life of the existing roof. Many white-coated roofs exist today due to excellent adhesion and high solar reflectance lasting more than 20 years after initial application.
White coatings generally reflect up to 90% of the sun’s rays while absorbing only 5% of the harmful ultraviolet (UV) rays, protecting the roof beneath. Darker pigmented coatings generally reflect less UV rays.
Pigments are usually used to enhance the aesthetic appeal of a roof. Aluminum coatings use an asphalt-type resin with “leafing” aluminum flakes, or flakes that are drawn to the surface of the coating due to specialized coatings. This effect creates a continuous aluminum surface that protects the asphalt layer from UV rays while reflecting up to 50% of the sun’s rays. Aluminum coatings themselves only emit low levels of infrared energy.
UV degradation and visible light from the sun repeatedly impinge upon the outermost surface layers of all roofing systems, accelerating oxidation and causing the existing system to become brittle. Today’s modern coatings employ technology to resist dirt pick-up and help maintain energy-saving reflectance qualities, as well as a bright, clean appearance.