Tag Archives: cool roof

Need a new roof? Get one while helping with Global Warming

We need to say goodbye to the trend of having dark roofs that not only attract and retain heat and raise ambient street temperatures, but lead to astronomical electricity bills because of the need to cool homes.”

University of NSW Professor Mattheos Santamouris, who has had an extensive career researching urban heat, said so-called “cool roofs” could decrease the energy consumption of uninsulated buildings by up to 50 per cent.

read entire article: https://www.smh.com.au/national/nsw/blistering-temperatures-dark-roofing-banned-on-sydney-s-urban-fringe-20210820-p58kma.html

Need to replace your roof? Consider a Cool Roof

A cool roof is one that has been designed to reflect more sunlight and absorb less heat than a standard roof. Cool roofs can be made of a highly reflective type of paint, a sheet covering, or highly reflective tiles or shingles. Nearly any type of building can benefit from a cool roof, but consider the climate and other factors before deciding to install one.

A cool roof can benefit a building and its occupants by:

  • Reducing energy bills by decreasing air conditioning needs
  • Improving indoor comfort for spaces that are not air conditioned, such as garages or covered patios
  • Decreasing roof temperature, which may extend roof service life.

Beyond the building itself, cool roofs can also benefit the environment, especially when many buildings in a community have them. Cool roofs can:

  • Reduce local air temperatures (sometimes referred to as the urban heat island effect)
  • Lower peak electricity demand, which can help prevent power outages
  • Reduce power plant emissions, including carbon dioxide, sulfur dioxide, nitrous oxides, and mercury, by reducing cooling energy use in buildings.

There are many types of roof systems available, but the surface exposed to the sun is the one that determines if a roof is cool or not. You can usually make a new or existing roof cool by selecting the appropriate surface.

Cool roof coatings are white or special reflective pigments that reflect sunlight. Coatings are like very thick paints that can protect the roof surface from ultra-violet (UV) light and chemical damage, and some offer water protection and restorative features. Products are available for most roof types.

read more at: https://www.energy.gov/energysaver/design/energy-efficient-home-design/cool-roofs

1 Way of 24 Ways to Save Energy Now

#24 the last of the series

Consider a cool roof – Cool roofing material are graded by their capacity to reflect light.  The coolest roofs have a so-called reflectance of up to 65%.  Which means they just absorb 35% of the sun’s energy.  Cool roofs give homeowners an average summertime energy savings of nearly 50 cents per square foot.

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