Green Roof Savings

The study looked at a range of benefits of green roofs including stormwater management improved health benefits due to reduced pollution and energy savings.

Green roof savings.

Many studies have been conducted over the past 10 years to consider the potential building energy benefits of green roofs and shown that they can offer benefits in winter heating reduction as well as summer cooling. The exact amount of savings is difficult to calculate as utility costs vary from state to state. Green roofs reduce the heat flux through the roof and less energy for cooling or heating can lead to significant cost savings. 1 2 in addition green roofs can reduce building energy use by 0 7 compared to conventional roofs reducing peak electricity demand and leading to an annual savings of 0 23 per square foot of the roof.

Shading the outer surface of the building envelope has been shown to be more effective than internal insulation. There are many different reported benefits that the addition of a green roof to a building can offer. Over its estimated lifespan of 40 years a green roof would save about 200 000 of which nearly two thirds would come from reduced energy costs. But according to the national research council of canada a green roof can reduce air conditioning.

Many studies have been conducted to assess the extent of energy savings possible with extensive green roofs.