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REFLECTIVE ROOF
Sacramento researchers coated a retail store’s dark roof white in 2002. Its peak roof temperature fell by up to 42°C and air-conditioning energy use dropped 52%In 2002, Sacramento researchers coated a retail store’s dark roof with a reflective cool-roof coating. The roof’s peak surface temperature ...
In Tucson, a 28,000-square-foot city roof got a white elastomeric coating; cooling energy fell 50–65%, saving over 400 million Btu and nearly $4,000 a yearCool roof coatings present an easy and efficient method to lower cooling bills during hot summer days. A Tucson city building illustrated i...
NLR reported a 110,000-square-foot Texas data center coated with IntelliKoat; its CEO said inside temperatures fell from 140°F to 86°F and heat failures dropped to zeroA Texas-based data center has successfully lowered its temperature through the application of an innovative roof coating called IntelliKoat...
Irvine coated a half-mile stretch of two connected streets with cool pavement; August and September measurements found the treated asphalt ran about 7-10°F coolerCities worldwide are turning to cool pavement technologies to tackle urban heat. In Irvine, California, treated roads have experienced a re...
Philadelphia installed white roofs on about 340 low-income seniors’ homes from 2001–2003; ceiling temperatures fell 4–5°F, and air-conditioning electricity use fell by 560 kWh per yearIn Philadelphia, the initiative to paint roofs white resulted in a remarkable decrease in home temperatures and energy consumption. This co...
A Berkeley Lab study compared two Fresno homes for a year; the reflective tile roof ran 13.8°C cooler on a summer day, cut cooling electricity by 26%, and peak demand by 37%In Fresno, California, a comparative analysis of two houses revealed the advantages of reflective tile roofing. The home adorned with this ...
AT&T painted two Nevada telecom roofs white; roof surfaces cooled 35–40°F, reached 12°F below outdoor air, and two buildings saved about 0.5 kWh of electricity a dayA study explored how white roofs reduced energy costs for AT&T communication buildings. Researchers observed significant roof surface tempe...
Silver Sands Middle School replaced gray shingles with reflective white metal; plenum temperature fell by over 25°F, and cooling energy in Portable 096 dropped by over 33%A recent study revealed that dark roofs on portable classrooms led to increased cooling costs. By switching to white metal roofing, energy ...
A Fresno home replaced dark asphalt shingles with reflective concrete roof tiles; a Lawrence Berkeley study reported 26% lower annual cooling energy use and 37% lower peak-hour demandA recent study in Fresno demonstrated that reflective roofs could lower cooling energy consumption by an impressive twenty-six percent. Hom...
In 1991, researchers coated a Merritt Island home’s green-gray shingle roof with reflective material; the shingles reached about 110°F after treatmentDark roofs tend to soak up heat from the sun, resulting in higher air conditioning demands and costs. Utilizing reflective roofing material...
Since 2016, San Antonio has replaced dark roofs on low-income homes with reflective shingles; the program was linked to lower attic temperatures and electricity useSan Antonio has launched an innovative project to replace traditional dark roofs with energy-efficient reflective roofing. This initiative ...
In 1996, Florida researchers whitened 7 shops in a Cocoa strip mall; roof surfaces fell by as much as 70°F, cooling energy dropped 25.3%, and peak demand dropped 40.3%In an innovative Florida trial, it was found that white roofs significantly decreased heat levels and energy usage. Traditionally, unpainte...
In 2001, researchers tested a white roof on a large Austin retail store; the study reported lower roof temperatures and an 11% reduction in cooling energy useA 2001 study in Austin demonstrated that white roofs lowered building temperatures significantly. This change reduced air conditioning ener...
In 2018, a University of Hawaii study compared green and white roofs in Honolulu; the green roof was reported to have lower peak temperatures at the surface and nearby airA University of Hawaii graduate student tested green roofs against white ones. The green roof proved significantly cooler than the adjacent...
In 2007, Oak Ridge built a roof with phase-change material between foil layers; attic temperatures fell about 22°F, with utility savings estimated at 8%Developed by Oak Ridge National Laboratory, innovative attic technology utilizing phase change materials has proven to lower attic temperat...
In 2023, CUHK researchers milled glass bubbles for 5 minutes before mixing cooling paint; solar reflectivity rose from 75.8% to 95.8% during field tests at noonInnovative researchers have unveiled a groundbreaking paint designed for energy-free cooling in buildings. By incorporating larger glass bu...
In 2021, Berkeley Lab made a roof coating that switches at 67°C. Today, it beats existing coatings in 12 of 15 US climate zones, cutting household electricity use 10%Installing TARC could help the average U.S. household reduce electricity consumption by up to 10 percent annually. Another advantage of TAR...
In 1995, Florida researchers coated a Cocoa Beach school roof white; over the following year, chiller energy use fell 10%, saving 13,000 kWh, while peak demand fell 35%A study conducted in Florida revealed that white roofs can drastically lower cooling costs, marking a significant achievement in the realm ...
City University of Hong Kong built a radiative-cooling ceramic tile reflecting 99.6% of sunlight; field tests found it about 5°C cooler than standard tilesResearchers developed a new ceramic tile inspired by beetles. This tile reflects 99.6% of sunlight and releases absorbed heat effectively. ...
Argonne modeled Chicago’s August 2021 heatwave with different roof types; white roofs lowered air temperature by nearly 2°C and cooling energy use by 16.6%Transforming the rooftops of Chicago into cooler surfaces has led to a notable reduction in city temperatures. The use of white cool roofs ...