High Albedo Roof Shingles

What advantages do cool roofs bring to small businesses.

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. 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. As one would expect albedo roofs are formulated with special high eminence materials that keep project a high level of thermal energy back into the atmosphere.

By preventing a majority of the heat from ever reaching the surface these roofs work to greatly reduce hvac cooling costs during the summer months. A sample cool roof. On a sunny day a roof that strongly reflects sunlight can stay much cooler than a roof that absorbs sunlight. 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.

In los angeles the average roof albedo is about 0 17. 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. Reflective roofs are more energy efficient and cooler inside and out. 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.