White or Lighter Color Roofs - Low Tech Way to Save Energy
Sometime low tech is the way to go ... painting a flat roof white can reduce the A/C load on a building and keep it cooler ...
This low tech solution " ... can act much like earth's snow covered poles; reflecting the sun’s light and heat as opposed to absorbing it ... keeps buildings cooler, reducing the problem of urban heat islands and saving energy (and money). ... we could counteract global warming simply by increasing the Earth’s total reflective surface. ...
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" ... Changing from a dark shingle ... to a light-colored (titanium-based white or terra cotta red) shingle can cut air conditioning costs by up to 40%. Georgia has been a leader in pushing cool roofs, passing a state law encouraging the shift. ... other states and regions also provide incentives, and the federal government is considering adding heat reflectivity requirements to housing regulations. "