Types of green roofs
Structural load capacity, how much weight the roof can hold, is a major factor in determining roof design and construction. Green roofs are therefore typically defined as being either extensive or intensive.
- Extensive green roof: an extensive green roof has growing medium that is 6 inches or less deep
- Intensive green roof: an intensive green roof has growing medium that is more than 6 inches deep
Semi-intensive green roofs represent a roof design intermediary between extensive and intensive roof. The following table summarizes characteristics of the different types of green roofs.
Template:General characteristics of extensive and intensive green roofs