- What is the approximate cost of a green roof?
The cost of the green roof is depending on which state you are in, which would range from $10 to $25 per square foot or $108 - $269 per square meter... (one square meter = approximately 10.76 square feet). More sophisticated green roof (or green wall) installations can cost from $25 to $100 per square foot, or $269-$1075 per square meter or more.(source http://www.green-buildings.com/content/78335-green-roof-cost)
How much energy does a green roof save?
According to the Center for Climate Systems Research, a comparison of a standard black tar roof and a green roof showed these results:
One square meter of black tar roof produced 500 kWh per year.
One square meter of green roof produced 140 kWh per year. (source http://alivestructures.com/FAQ/greenroof_faq)
On average, for one story structures, a green roof saves $4.50 per square foot on an annual basis.(source http://alivestructures.com/FAQ/greenroof_faq)
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