That is because green roofs absorb much of the heat from the sun causing the rooftop to be about 80 degrees cooler than a traditional rooftop.
How much money will a cool roof save.
By amanda kimble evans february march 2010.
One way to estimate how much energy you would save by installing a cool roof is by using the cool roof calculator.
The basic idea behind cool roofs is simple and recognized for centuries by the ancient greeks and egyptians.
The total amount of savings in the us has reached an annual 1 billion dollars in the public sector alone.
Homes in arizona have seen the cost to cool their homes drop by up to 350 a month and companies with commercial buildings stand to save even more regardless of location.
The tables below show the expected savings in electricity bills that a cool roof can provide for the 15 and 30 year time periods incorporating a 4 annual utility inflation rate.
To obtain the energy star label steep slope products must have an initial solar reflectance of at least 0 25.
According to the united states department of energy a cool roof has the potential to save a homeowner or business owner up to 15 on their air conditioning bills annually.
First and foremost a cool roof will save you money.
Why you should have a cool roof.
If nothing else a white or cool roof will save you up to 20 percent on your air conditioning bill and it s hard to argue with that.
Even with good insulation that heat penetrates roofs and warms up attics and top floors forcing air.
Cool roofs can save money several ways including energy savings rebates and incentives hvac equipment downsizing and extended roof lifetime.
June 27 2018 written by.
Estimates cooling and heating savings for flat roofs with non black surfaces.
Additional cool roof costs include specialized materials and labor.
Energy star recognizes cool roof products that reduce peak cooling demand by 10 to 15.
Over 15 years the cool roof can save almost 12 000 in utility bills and in 30 years the savings can exceed 33 000.
During the heat of summer a non reflective rooftop is one of the hottest places out there far hotter than the surrounding air.
However over the life of the green roof it is estimated that it will save around 200 000 239 897 in 2016 dollars in energy costs.
The council estimates that a cool roof can save a homeowner 7 to 15 in cooling costs.
Over its lifecycle a new white roof costs no more than a traditional roof.
No matter where you live you can save energy and money by switching to a white or cool roof for about the same cost as a conventional roof.
How energy efficient roofing helps beat the heat save money.