High Albedo Roof Coating

Substitute reflective marble chips or gray slag for dark gravel in a flood coat of asphalt.

High albedo roof coating. In contrast to conventional roofs these kind are specifically designed to reduce internal building temperature by reflecting the sun s uv rays. On clear sunny days when the solar noon surface temperatures of conventional roofing materials were about 40 degrees c 72 degrees f warmer than air the surface temperature of high albedo coatings were only about 5degreesc warmer than air. Published by elsevier science s a. The function of this pavement is based on a thin paint coating on the surface of the conventional dark asphalt pavement which has quite high reflectivity for the near infrared and low reflectivity for the visible.

Since it works on the principle of continuous rejection of uv and ir rays the roof itself is not getting heated up. In this view those coatings are usually applied over flat and low sloped roofs in general in order to avoid summer overheating. By lowering the absorption of solar energy high albedo coatings reduce building surface temperatures and heat transfer to the building interior. Albedo reflective roof coatings and assesses the use of high albedo however is likely to decrease if the initial albedo is high building materials for cooling energy and peak power sav because of surface accumulations and material degradation.

Apply a cool coating directly on top of a dark asphaltic emulsion coating. High albedo paint is an elastic ready to use roof coating. This results in the dark colored pavement surface while achieving much higher albedo. High albedo roof coatings can be used to reduce building air conditioning use and if implemented at large scale might reduce summer urban temperatures.

For commercial roofing high albedo coatings can be applied over an existing roof in good repair as a retrofit. Use reflective mineral granules or a factory applied coating rather than a dark coating on a mineral surfaced sheet. High albedo coatings as previously mentioned are able to limit the increase of surface temperature of a roof in opposition to a high absorptive finishing. This high sri paint acts as heat reducing paint which can be applied as cool roof coating having single objective of roof insulation.

One of the more recent advancements in the field of green commercial construction are what are known as cool or albedo roofs. 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. Coolroof heat reflective paint has been designed to give relief from roof heat as it is a high albedo paint having high sri value which makes it most suitable for roof insulation.