How Cool Roof Works

How it works most of the roofs in the world including over 90 of the roofs in the united states are dark colored.

How cool roof works.

Reflective coatings for instance are difficult to apply evenly. A cool roof prevents heat absorption by reflecting the sun s heat and then emitting its radiation back into the atmosphere. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. Cool roofs can also enhance roof durability and reduce both building cooling loads and the urban heat island effect.

Department of energy the surface of a cool roof reflects more sunlight and releases more heat than a so called hot or dark roof. A cool roof is a roof designed to maintain a lower surface temperature in bright sunshine than a traditional roof source. Solar reflectance and. While the term cool roof is sometimes used to describe any roofing surface that is cooler than a standard rooftop green certification.

Solar energy is composed of ultraviolet uv rays visible light and infrared energy. The coolness of a roof can be determined by comparing two factors. A small fraction less than 10 arrives as invisible ultraviolet light. To understand how roofs can keep cool in the sun you need to first understand solar energy.

Science of cool roofs how do cool roofs work. Some single ply membranes may be installed on high sloped roofs but the most effective solutions for high sloped roofs are cool roof shingles and tiles. A professional will be able to determine the slope of your roof and what cool roofing system will work best. Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.