In the other its the roof. Although there are inherent benefits in the use of reflective roofing before selecting a roofing product based on expected energy savings consumers should explore the expected calculated results that can be found on the Department of Energys Cool Roof Calculator.
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The higher the SRI number the more a given roofing product will reflect.
Best roof color for energy efficiency. That said a multi-color blend in a roof that includes at least one color similar to the brick color can help complement brick siding in a way that improves the overall curb appeal of the house. A white roof is much more energy efficient than a dark roof according to studies at Concordia University. Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.
Metal roofing will generally offer more energy-efficient options in both metal shingles and standing seam. Light Color Roofs or Dark Roofs. HydroSHIELD Ceramic Insulating Roof Coat Ceramic Roof Coat Ceramic T2S 1 HydroSHIELD White Reflectant Roof Coating Standard White Coating Premium White.
Roof color choice also may affect shingle life in those climates. Hotter than a white-roof attic in Florida according to the Florida Solar Energys Phil Fairey. Driftwood Georgetown Gray Colonial Slate and Granite Gray.
However they note that light roofs may increase energy costs in cooler climates. Hi Diana So there are some good solar-reflective roofing options for sloped roofs available in both asphalt shingles and metal roofing. Please remember the energy savings that can be achieved with reflective roofing is highly dependent on facility design insulation used climatic conditions building location and building envelope efficiency.
You will want to consider the color of your roofing materials for more than aesthetic value. Lighter roof colors will reflect more of the suns energy while darker colors tend to absorb heat which can then transfer to attics where it can seep down into the home. Here are some more CertainTeed Landmark colors to consider in addition to the gray color you mentioned.
Roofing Color Effect on Cooling Costs. South is best west works well too and a mix is OK too. A cool roof under the same conditions could stay more than 50F cooler and save energy and money by using less air conditioning.
Cool-colored tiles contain pigments that reflect 25 to 70 percent of solar energy depending upon the color. They can be shaped and colored into many roof types like shingles shake or tiles making them a more versatile choice. Both the quality of an organization and the energy efficiency of the building that houses it start at the top.
For instance an attic under a black-colored roof can be 30 degF. Light colors would be in order there. Look for CoolRoof rated colors specifically solar reflectivity index SRI.
Since dark surfaces are better heat absorbers traditional cool roofs are white. Concrete tiles or shakes are coated with enamels or plastic for durability and better heat trapping efficiency. This is known as the albedo effect and many studies have documented significant energy savings from simply lightening the color of a roof.
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. Light-colored roof shingles on a two-story can look out of balance especially if the roof has a lower pitch such a 412 or 612. They can also be more expensive but their durability and energy efficiency.
The amount of energy each solar panel produces will be directly reduced by the amount of shade covering each panel so less shade is always better. Standard or dark roofs can reach temperatures of 150F or more in the summer sun. The color of a roof also plays a part in whether the roofing is energy efficient.
Cool-colored metal roofing also contains pigments that reflect 20 to 90 percent. Energygov recommends lighter-colored roofs for houses in warm and hot climates. Concrete roofs are considerably heavier than other roof types thus the need for a sturdy underlayment.
Berkeley Lab research has demonstrated that raising the solar reflectance of a roof from about 20 percent dark gray to about 55 percent weathered white can reduce cooling energy use by 20 percent. In one case its the business plan.
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