Building roofs can be important in achieving reduced building energy use and decreasing stormwater runoff.
Green Roofs are encouraged where roofs can structurally support an intensive or extensive green roof.
If a green roof cannot be pursued, a cool roof should be installed to help mitigate heat island effect and reduce building energy costs. Refer to Leadership in Energy and Environmental Design (LEED) guidelines for heat island effect for help in achieving a cool roof.
Consider the economic advantage of a power purchase agreement such as renting building roof space to a solar photovoltaic power provider.