Green Roof Technology

• There are basically two main categories of newer, contemporary vegetative, green roof systems . They are extensive and intensive. An extensive system typically has from one and a half to six inches of substrate or planting media and typically is not suitable for foot traffic or occupancy.
• An intensive roof system is very much the same as older style gardens found on rooftops, which were accessible to people to enjoy much like traditional gardens. They generally have a deeper, soil-based substrate from eight to twenty-four inches in depth allowing for greater plant diversity.
• The benefits of green roofs and they typically are divided into three main categories - aesthetics / amenities, environmental & economic
• The three tools that will likely be the most useful in implementing green roofs
  are: 1) mitigation regulations designed to address increased urbanization; 2) storm water fees based on impermeable surfaces; and 3) decentralization of storm water management

Green Roof Technology details here