Benefits of a Green Roof - Control of Runoff

A green roof acts like a sponge to absorb water. The soil stores the water for the plants to use, and this reduces the amount of runoff after a storm.
This can reduce or eliminate the need for roof drains.
In addition, green roofs can delay runoff from storms so that city sewer systems do not become overburdened.
This can also lead to a reduction in stormwater or wastewater charges from your city.
Because of the increased retention of stormwater, there is also no need to expand or rebuild existing infrastructure, saving money.
In addition to delaying the runoff of stormwater, green roofs filter the water and moderate its temperature.