How To Cool Roof

Cool roofs can reduce air temperatures inside.

How to cool roof.

By lowering energy use cool roofs decrease the production of associated air pollution and greenhouse gas emissions. Cool roof rating council. The cool roof rating council accepts test reports from approved testing laboratories and then compiles the information in an easily accessed database. The cool roof rating council is a not for profit organization that validates the reflective and emissive properties of cool roof products.

What is a cool roof. 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. A cool roof is one that strongly reflects sunlight and also cools itself by efficiently emitting radiation to its surroundings. The roof literally stays cooler and reduces the amount of heat conducted to the building below.

Department of energy the surface of a cool roof reflects more sunlight and releases more heat than a so called hot or dark roof. Cool roofing information for home and building owners. Reduced air pollution and greenhouse gas emissions. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun.

While the term cool roof is sometimes used to describe any roofing surface that is cooler than a standard rooftop green certification. Install windcatchers in the roofing to direct cool air downward. Flat roofing is more prone to trapping heat than other roofing systems and this causes your building to be warmer and your energy costs higher. A cool roof is a roof designed to maintain a lower surface temperature in bright sunshine than a traditional roof source.

Historically cool roofs have been either white. Cool roof rating council crrc has created a rating system for measuring and reporting the solar reflectance and thermal emittance of roofing products. This system has been put into an online directory of more than 850 roofing products and is available for energy service providers building code bodies architects and specifiers property owners and community planners. Used in countries with hot dry climates for centuries the windcatcher has an onion shaped dome with nearly vertical vanes that will turn in even slight breezes the vanes force cooler air down a shaft into the house.

A cool roof transfers less heat to the building below so the building stays cooler and uses less energy for air conditioning. 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. Manufacturers however have developed a number of solutions you can use to keep your flat roof cool all year round.