Black Roof Energy Efficiency

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.

Black roof energy efficiency.

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. 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. Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective. Energy efficiency can be achieved through broadly available non proprietary technologies offered by more than one manufacturer.

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. Cool roofs have been proliferating. So in 1999 the u s. This is known as the albedo effect and many studies have documented significant energy savings from simply lightening the color of a roof.

How they can be made cool. The energy star energy efficiency criteria do not include a specification for roof insulation. Labeling would effectively differentiate products and be visible for purchasers. Environmental protection agency s energy star program began rating roofing materials for energy.

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. There are different cool roof standards for commercial low slope roofs and residential steep slope roofs. 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. The hotter the roof the more energy it takes to cool the building beneath it.

Roof products key product criteria. Florida solar energy center and while asphalt tiles don t have the power of a magnifying glass. Product energy consumption and performance can be measured and verified with testing. Modern energy efficient metal roofing acts as a giant mirror of sorts by reflecting the heat and energy up into the air.

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. Reformulate or coat black membranes to make them reflective. Solar reflectiveness affects energy. Learn how a product earns the label.