What is a Green Roof?
A green roof or living roof is a roof that is partially or entirely overlaid with vegetation planted over a waterproofing layer. It may also incorporate extra covers such as a root layer and drainage or irrigation systems.
Green roofs are used for proposes such as intercepting rainwater, contributing with insulation, creating an environment for wildlife, minimizing the stress by giving a more aesthetically pleasing view, reducing urban temperatures, and moderating the “Heat Island Effect”.
There are two types of green roofs: Intensive Roofs and Extensive Roofs.
Intensive Roof is thicker, with a minimum depth of 12.8 cm (5 1⁄16 in), and can sustain a more extensive type of plants but are heavier and need more care.
The Extensive Roof is shallow, reaching in depth from 2 cm (13⁄16 in) to 12.7 cm (5 in), lighter than the intensive one, and demands minimal care.
Types of green roof plants
- Low-growing succulents
- Herbaceous perennials
- Annual and biennial plants
- Small shrubs
- Decrease energy waste.
- Reduce heating by adding volume and warm resistance.
- Decrease stormwater flows via water-wise gardening methods.
- Build a natural habitat for animals such as insects, birds, bees, and butterflies in the middle of an urban desert.
- Decrease carbon emanation.
- Increase the roof lifetime by over 200% by overlaying the waterproofing coating.