High Albedo Roof Shingles

While the albedo of 0 2 represents a typical roof with a dark surface default value in energyplus the albedo of 0 5 represents a roof top with a bright color after weatherization deterioration of albedo during the first years and is a conservative estimate of the albedo of high albedo sloped roofs.

High albedo roof shingles.

In california where many low rise residential homes are subject to the requirements of title 24 cool roof shingles have become a major trend in residential roofing. On a sunny day a roof that strongly reflects sunlight can stay much cooler than a roof that absorbs sunlight. A sample cool roof. This roof has a high albedo and reflects about 63 of the energy from sunlight.

Many homeowners find that the best solution for their roof is to install asphalt shingles designed to meet cool roof requirements. The cool wall had a temperature reduction of 0 054 k 0 1 albedo whereas the cool roof had a reduction of 0 059 k 0 1 albedo. Reflective roofs are more energy efficient and cooler inside and out. A higher albedo means that a roof has a higher ability to reflect the sun s rays and thus reflects more sunlight than traditional roofs.

In los angeles the average roof albedo is about 0 17. Following the simulation results show that cool walls with an albedo rating of 0 9 showed very similar temperature reductions as that of high albedo cool roofs. What advantages do cool roofs bring to small businesses. Cool roofing systems also have high thermal emittance which is the ability to radiate absorbed heat back into the air and away from your business.