High Albedo Roof Materials

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.

High albedo roof materials. Coolroof heat reflective paint has sri value of 122 as per astm leeds standards for green buildings. 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. High albedo materials are those materials that have high reflectivity and low absorptivity. Reflective surfaces are a form of geoengineering.

Coolroof paint is a high albedo product having solar reflectance of 0 95 and emissivity as high as 0 91. The most well known type of reflective surface is the cool roof. Residential roofing options include asphalt shingles metal clay tiles and concrete tiles. New materials in high albedo roof coatings this section describes the main innovation efforts around high albedo or cool coatings.

For commercial roofing high albedo coatings can be applied over an existing roof in good repair as a retrofit. Tile roofs can be made of clay slate or concrete. These materials are preferred during the development of smart cities and green buildings because they help neutralize the urban heat island effect in a natural manner. High albedo materials can save cooling energy use by directly reducing the heat gain through a building s envelope direct effect and also by lowering the urban air temperature in the neighborhood of the building indirect effect p p this project is an attempt to address high albedo materials for buildings and to perform measurements of roof coatings.

Other roof shingles can be coated at the factory or in the field to make them more reflective. Commercial cool roof options include bright white membranes and white coatings. Tiles can be glazed to provide waterproofing or coated to provide customized colors and surface properties. In the morning and in the late afternoon the high albedo materials were as cool as the air itself.

In contrast to conventional roofs these kind are specifically designed to reduce internal building temperature by reflecting the sun s uv rays. The solar reflective index sri for coolroof is 122.