The word “paint” is often used when discussing ways to cover your roof with a material that has the capability of reflecting the sun’s UV rays away from the building; however, the word “paint” is an incorrect term to use – “coating” is the correct term. While there is reflective white roof paint on the market, it does not come close to having the ingredients necessary to protect your roof from natural elements and cannot provide longevity to the roof that a coating is capable of.
“Paint” is a colored substance that is spread over a surface to dry and leave an enhanced decorative finish. It does not contain ingredients that allow it to expand and contract with the movement of a roof. Instead, the opposite will occur - paint will crack, split and peel when too much movement occurs. Paint is also a much thinner substance than a coating. It is generally applied 5-10 times thinner than a coating would be applied, making it less durable and containing fewer protective ingredients to increase the lifespan of your roof.
Reflective white roof coating not only is the proper terminology but is also the superior choice if you do see “roof paint” on the market. Roof coatings are packed full of UV protective ingredients that are necessary to reflect the sun’s harmful light and solar radiation away from the building. These ingredients are crucial for keeping the roof cool and the inside of the building a comfortable temperature. Paints do not contain these ingredients. Roof coatings serve to protect your roof, while you can buy tinted coatings to add color to the roof; the main purpose of a roof coating is to protect your roof. Roof coatings are applied as systems and contain several layers of protection. National Coatings offers several systems for multiple types of roof substrates with different system thickness depending on your needs. The greater the thickness of a system, the longer the system can be warranted. For more information, download the Product and Application Brochure.
Many people do not realize that a roof is faced with several elements that cause it to prematurely age, fail and leak. The sun’s UV rays are the most detrimental to a roof because the solar radiation causes seams to fail, cracks to occur, and the roof membrane to shrink in mil thickness. Constant climate changes in areas where temperatures rise during the day and drop substantially at night, need additional protection from rips and tears that occur from the building expanding and contracting too quickly with the temperature. Hail and severe thunderstorms can cause holes in your roof from hard pieces of hail, as well as, surrounding debris (ex. broken tree branches) that fall on the roof. Roof coatings add layers of protection to the surface of your roof, shielding the roof from these harmful natural elements, allowing your roof to stay a watertight, leak free membrane.
Roof coatings are excellent for waterproofing your roof and are renewable. National Coatings environmentally friendly roofing systems can extend your roofs’ life indefinitely. Coating your roof every 10 or so years will allow your roof to remain leak-free while never needing to worry about a costly tear-off.