A reflective roof coating is applied to roofs to help reflect more sunlight from the surface, thus reducing the amount of heat absorbed by the structure. On top of that, they also aid in creating more comfortable indoor environments, and play a role in prolonging the life of roofs and roofing materials.
Reflective Roof Coating: How a Reflective Roof Coating Works
Cool roof coatings work to keep your home cool in two distinct ways. The first is by solar reflectance, or the coating’s ability to reflect sunlight away as soon as it hits your structure. Instead of absorbing the sunlight and heat like a traditional roof, a cool roof reflects the light and heat away from your home, keeping your home cooler in the process. The other way that cool roofing helps to keep your home cooler is through thermal emittance. These roof coatings are now made with special materials that increase your roof’s thermal emittance level, or your roof’s ability to radiate absorbed heat back into the atmosphere instead of down into your home. It’s this potent combination of high solar reflectance and thermal emittance that make these roof coatings so effective at keeping your home cool and your energy costs and usage down.
Reflective Roof Coating and Energy Savings
What kind of energy costs and usage savings are we talking about here? Significant ones. Your local climate, and whether you use air conditioning or not. However, if you live in a hot climate that experiences warm temperatures and sunny days for a substantial portion of the year, you can expect energy savings of up to 70%. If not, your energy savings from applying a reflective roof coating could range anywhere from 20% to 70% when it?s all said and done.
The most important decision you’re going to make when shopping for cool roof coatings is the color. Reflective coatings come in white, a variety of darker colors, and in high reflection coatings. What you decide on here can make a huge difference. Highly reflective coatings, which most often resemble a paintable aluminum coating, come in second with reflectance levels in the 60% to 70% range. And if you decide to choose looks over performance, colored coatings significantly reduce the reflectivity ratings to 15% to 35% (which is still better than no coating at all). When you make your decision, keep in mind also that if your new roof coating reflects enough light and heat (65% for flat roofs and 25% for sloped roofs), it will also qualify as an Energy Star rated roof and will earn you tax breaks on top of the high energy savings.
Application and Other Improvements
These coatings can be applied on your own, you can hire a professional to do the job for you, or you can look for roofing materials that have reflective coatings already baked onto the surface. Improving traditional insulation in your attic, installing reflective attic insulation, and improving attic ventilation are all smart steps to take, along with applying reflective coatings, in order to get maximum energy efficiency out of your home.
KEY TAKEAWAY:
- White coatings are by far the most effective, and reflect anywhere from 50% to 90% of the sunlight and heat that hit your roof.
- If you’re serious about improving the energy efficiency of your home, talk to an energy auditor or general contractor about other modifications you can make to improve your efficiency ratings.
- It’s important to realize that the amount of benefits you get from your reflective coating will vary depending on the shape of your home, the coating you choose, how energy efficient your home already is.


The job progressed smoothly while Mrs. Smith and Taffy barked out requests and orders as they saw necessary. As the men were finishing, Mrs. Smith had to go inside to take a phone call, leaving Taffy to supervise. The crew members went around the back of the house to start the clean-up process, making sure to leave the job site spotless. Taffy remained in the front of the house curiously poking around the men’s tool belts. She found a tube of gutter sealant, pulled it out of the tool pouch, and proceeded to roll around in fresh caulk.
Mrs. Smith exited the house at the exact same time that the workers came around to see the site. To the shock and horror of everyone involved, Taffy was covered in the very difficult to remove sealant. Mrs. Smith went CRAZY!!! She was absolutely furious, crying that her poor baby would never be the same.
Long story short, we here at Alloy Gutter paid for the puppy spa so that Taffy could get a proper clean-up and haircut. Mrs. Smith was satisfied with our willingness to do so, and in the end was quite pleased with our work to boot.
The point is, we all make mistakes. The important thing is that we take responsibility for our mistakes and satisfy our customers to the very best of our ability.