Cool Roof Technology Abstract

Cool roofs are changing the roofing industry.

Cool roof technology abstract.

As a general guideline if a low slope roofing system meets california title 24 requirements it will also meet the leed and energy. Highlights we studied the energy impact of a cool roof in an office building in london. Impact of cool roofs on cooling system efficiency. Commercial buildings are benefiting from cool roof savings throughout the usa even in northern climates and that is fundamentally shifting the roofing marketplace.

The study includes experiments and thermal modelling. Overall energy demand reduces between 1 and 8 5 relative to an albedo of 0 1. A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning. In light of this cool roofing is one of the main strategies used to prevent future occurrences of heat island effects cool roofing is an emergent and powerful technology used for temperature control of buildings and areas.

Thermal comfort improves by 2 5 c but heating demand increases by 10. A cool roof is a roofing system that delivers higher solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the building and higher thermal emittance the ability to radiate absorbed or non reflected solar energy than standard designed roofing products. Today tpo makes up over 50 of the single ply market. The cool roof rating council was created in 1998 to develop accurate and credible methods for evaluating and labeling the solar reflectance and thermal emittance radiative properties of roofing products and to disseminate the information to all interested parties.

Roof reflectivity of 0 6 0 7 is optimum for london climate. Studies have isolated and evaluated the effects of climate surface reflectivity and roof insulation on energy savings thermal load mitigation and also ameliorating the urban heat. For example epdm was the most popular single ply membrane in the industry in 2003. When working to meet local environmental mandates the priority is to choose a cool roof that meets regional and or green rating council requirements.

Historically cool roofs have been either white. A cool roof prevents heat absorption by reflecting the sun s heat and then emitting its radiation back into the atmosphere. What to look for when selecting a cool roof technology. Active cool roof effect.

Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles. Yet you may not be familiar with what exactly the term means so let s give you a quick primer on cool roof technology with a special emphasis on its suitability in the indian context. 7 mitigating urban heat island using cool roof technologies pp. Cool roofs is a green building technology that is especially suited to the climate of the india.

Advances in building energy research.