Types of Green Roofs

Today many architects and building owners are once again embracing green roof technology. The two distinct types of green roofs are intensive and extensive. Intensive green roofs are characterized by thick soil depths (8" - 4'), heavy weights and elaborate plantings that include shrubs and trees. Intensive green roofs are installed primarily over concrete roof decks to withstand the weight requirements. These park-like green roofs can be at or above grade and require considerable maintenance to sustain their aesthetic appearance.

Extensive green roofs are much lighter in weight with soil depths ranging from 3" to 7". Due to the shallow soils and the extreme environment on many roofs, plants are typically low growing ground cover that are extremely sun and drought tolerant. Extensive green roofs can be installed over various roof decks; however, a structural engineer should always first inspect the structure to define it weight load limitations. Although the focus of most extensive green roofs are the environmental benefits, extensive green roofs still require periodic maintenance.







History of Green Roofs
Types of Green Roofs
Benefits of Green Roofs
Garland's GreenShield System
Dollars and Sense of Green Roofs








Green Roofs
ENERGY STAR®*/Cool Roofs
Recycled/Recycleable Systems
Solar Roof Systems
Sustainable Links
Title 24

*ENERGY STAR® is a registered trademark of the U.S. government. The ENERGY STAR Program represents a voluntary partnership between businesses and organizations and the federal government to promote energy efficiency and environmental activities.