Green Roof Infiltration

Rainwater harvesting green roofs vegetated swales and.

Green roof infiltration.

In fact a green roof replicates the natural landscape allowing water to infiltrate the vegetation substrates and engineered drainage layers of the green roof. Green roofs can help reduce energy costsfor a building by acting as another layer of insulation between the inside and outside of the roof. Integrate practices into your treatment drains to mitigate stormwater impacts including. The minimum thickness of the green roof growing medium must be calculated as follows where the impervious roof area to green roof area ratio is less.

Integrating a green roof into a historic building rehabilitation project may appear to be an easy solution to reducing the urban heat island effect improving storm water management and improving the energy efficiency and sustainability of the building. This is most noticeable in intensive green roofs since there is a thicker and more consistent layer of soil which provides a higher insulating value. Other practices designed for decreasing peak flow that do not require soils with high infiltration rates. Use practices that do not require infiltration.

This captured water is then evapotranspired back to the atmosphere through the green roof vegetation.