Solar Reflective Roofing Materials

Based on 2006 data from more than 150 energy star partners shipments of cool roof products have grown to represent more than 25 percent of these manufacturers commercial roof products and roughly 10 percent of their residential roof products.

Solar reflective roofing materials.

Roofing materials with the energy star label have met minimum solar reflectance and reliability criteria. The solar reflectance index or sri is a calculation using the aged solar reflectance and thermal emittance measurements of the asphalt shingles materials. How solar reflective roofing works whereas darker traditional roofing materials absorb sunlight the reflective surfaces of a cool roof reflect it away. How they can be made cool.

Energy star certified roof products. Shingle roofs consist of overlapping panels made from a variety of materials such as fiberglass asphalt wood polymers or metals. Solar reflective shingles and solar reflective roofing membranes can be an important component in a building system designed to reduce overall building energy consumption and the impact the home or building has on the environment. It ranges from 0 to 100.

The most well known type of reflective surface is the cool roof. 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. Reflective surfaces can deliver high solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the surface and high thermal emittance the ability to radiate absorbed or non reflected solar energy. This measurement can be used as an indicator of how hot shingles are likely to become when they re exposed to the sun.

Reflective surfaces are a form of geoengineering. The solar reflectance index sri is a measure of the constructed surface s ability to reflect solar heat as shown by a small temperature rise. Coating existing asphalt shingles to make them cool however is not normally recommended or approved by shingle manufacturers. Premier radiance our premier radiance shingles provide more than just a roof over your head.

Emissivity and how it relates to energy savings and cool roofs. This wood shake inspired solar reflective asphalt shingle reflects solar energy and radiant heat far better than traditional roofing shingles keeping your home cooler in hot months and your roof looking great all year long. This results in lower absorption of solar heat and a cooler roof. Infused with solar reflective granules this shingle reflects heat producing ultraviolet rays from the sun back into the atmosphere which may reduce heat transfer into your home.

Roof temperature is rated via solar reflectance and thermal emittance with ratings ranging between 0 and 1.