Using the cool roof calculator on Oak Ridge National Laboratory’s website, it shows that if you live in Miami, Florida a white “cool” roof can save you approximately 0.185 USD per square foot per year as compared to a black roof. That’s roughly $647.50 per year for a 3500-square-foot home or $9,250 per year for a 50,000-square-foot office building or warehouse.
But what happens when a white roof turns grey?
When doing energy saving calculations, one of the overlooked errors is not factoring in the loss of insulating performance when white roofs get dirty or moldy. When that happens, the “cool roof” impact is less effective because the roof has gone from a reflective white to a grey or green.
For concrete roof tiles, especially, another factor that impacts energy efficiency is moisture. When a roof is wet, it conducts more heat than when it’s dry, making it less energy efficient.
That’s why Crystal clear insulating and mold resistant roof coating benefits all types of roofs, including white roofs. It not only has its own insulating benefit (in all seasons and climates), it also helps the roof stay clean and resists the growth of mold. Another benefit it provides is a moisture resistant surface, so rain beads up and rolls off (taking dirt along with it) rather than soaking in.
If you tally the stay clean/maintenance benefits (not the energy saving ones), you can estimate saving approximately 25 cents per square feet to have a roof power washed. For a 5,000-square-foot roof that is $1250 per washing, which is usually done every one to two years by most. Product for that same amount of roof, would be approximately $3,000, so with incorporating maintenance savings, payback would be approximately 2.4 years, and your total maintenance savings over the 10-year warranty period would be approximately $12,500 if you previously had to clean the roof each year.
A School Used Crystal Roof Coating to Keep their White Roof Clean & Efficient
A Florida school had a costly issue, their white metal roof grew mold and collected dirt, meaning not only constant maintenance costs to clean it, but also a loss of energy efficiency. They looked to Crystal roof coating to solve the issue and ran a 60-day trial to see how it would help them.The roof was cleaned and a section of the roof was painted with a coat of white paint and then over-coated with two coats of Crystal clear insulating and mold and UV resistant roof coating.
The photo above was taken 60-days after application. The spots where Crystal was applied stayed clean and white, while the unprotected areas became dingy and less energy efficient once again.
Additionally, the coating provided thermal insulation to lower cooling costs, even when the sun wasn’t shining.
Contact INI Worldwide for a quote for either product only or product and application.