High Albedo Roof Coating

Since it works on the principle of continuous rejection of uv and ir rays the roof itself is not getting heated up.

High albedo roof coating.

One of the more recent advancements in the field of green commercial construction are what are known as cool or albedo roofs. 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. 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. In this view those coatings are usually applied over flat and low sloped roofs in general in order to avoid summer overheating.

For commercial roofing high albedo coatings can be applied over an existing roof in good repair as a retrofit. 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. Use reflective mineral granules or a factory applied coating rather than a dark coating on a mineral surfaced sheet. Apply a cool coating directly on top of a dark asphaltic emulsion coating.

High albedo paint is an elastic ready to use roof coating. In contrast to conventional roofs these kind are specifically designed to reduce internal building temperature by reflecting the sun s uv rays. This high sri paint acts as heat reducing paint which can be applied as cool roof coating having single objective of roof insulation. Measures cr 1 and cr 2 examine the impacts of applying such a coating over a light gravel covered built up roof.

Published by elsevier science s a. This results in the dark colored pavement surface while achieving much higher albedo. 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 roof coatings can be used to reduce building air conditioning use and if implemented at large scale might reduce summer urban temperatures.

When coated on the roofing materials reflects sunlight to a greater extent and prevents the roofing materials from getting heated up even in peak summer afternoons. Substitute reflective marble chips or gray slag for dark gravel in a flood coat of asphalt. 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.