By Shelly, Apr 26 2016 09:21AM
These days, green roofs are becoming a much more common sight, especially as more and more buildings are designed and built with the environment in mind.
A green roof or living roof is a roof that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. They can also include additional layers such as a root barrier and drainage and irrigation systems.
Green roofs serve several purposes for a building, such as absorbing rainwater, providing insulation, creating a habitat for wildlife and helping to lower urban air temperatures and mitigate the heat island effect. They effectively utilise the natural functions of plants to filter water and treat air in urban and suburban landscapes.
There are two types of green roof:
- Intensive roofs
- Extensive roofs.
The former are thicker and can support a wider variety of plants but are heavier and require more maintenance. Whereas the latter are more shallow and, therefore, lighter than intensive green roofs, requiring minimal maintenance
So, is a green roof really worth considering?