Black Roof Energy Efficiency

Modern energy efficient metal roofing acts as a giant mirror of sorts by reflecting the heat and energy up into the air.

Black roof energy efficiency.

Learn how a product earns the label. Environmental protection agency s energy star program began rating roofing materials for energy. Roof products key product criteria. Department of energy there is widespread belief that white reflective roofing systems even on buildings in northern cities like new york and chicago are more efficient and more cost effective than dark roofing and that these systems also reduce global warming and the heat island effect in which.

Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective. However the black roof heated the air within 5 inches but there was no difference in air temperature impact for black or white roofing beyond that distance. A white or light colored metal surface reflects best under testing at about 67 percent reflectivity and even some newly developed cool colors send the rays away source. Reformulate or coat black membranes to make them reflective.

Energy star certified roof products can help reduce the amount of air conditioning needed in buildings and can reduce peak cooling demand by 10 15 percent. So in 1999 the u s. Florida solar energy center and while asphalt tiles don t have the power of a magnifying glass. They are used in about two thirds of new roof or re roof installations in the western u s.

Product energy consumption and performance can be measured and verified with testing. Labeling would effectively differentiate products and be visible for purchasers. This is known as the albedo effect and many studies have documented significant energy savings from simply lightening the color of a roof. The hotter the roof the more energy it takes to cool the building beneath it.

Single ply membranes are pre fabricated sheets rolled onto the roof and attached with mechanical fasteners adhered with chemical adhesives or held in place with ballast gravel stones or pavers. In today s market a cool roof is defined by the reflectivity and emissivity requirements set by either title 24 from the california energy commission or by the energy star program. How they can be made cool. Cool roofs have been proliferating.

1 cool your roof cool roofs are lighter in color than traditional black asphalt or dark wood shingles and save energy by reflecting light and heat away rather than absorbing them. In california they have been part of prescriptive requirements of the title 24 building energy efficiency standards since 2005 for all new nonresidential flat roof buildings including alterations and additions. From leed the cool roof rating council and energy star program all the way up to the u s. Solar reflectiveness affects energy.