A living roof is a roof of a building that is partially or completely covered with vegetation and soil, or a growing medium, planted over a waterproofing membrane. Also known as 'living roofs', green roofs serve several purposes; absorbing rainwater, providing insulation, creating a habitat for wildlife, and helping to lower urban air temperatures. There are two types of green roofs:
- Intensive roofs, which are thicker and can support a wider variety of plants but are heavier and require more maintenance.
- Extensive roofs, which are covered in a light layer of vegetation and are lighter than an intensive green roof.