Types of Green Roofs

Two basic types of green roofs are commonly constructed; extensive and intensive.

I. Extensive Green Roofs


  • Uses shallow soil medium making it lighter weight
  • Harsh conditions favor drought tolerant plants such as sedums
  • Minimal maintenance
  • Relatively low cost
  • Pre-planted modules are available for ease of installation


  • May require occasional maintenance such as weeding
  • May require additional irrigation during extended dry periods

II. Intensive Green Roofs


  • Uses deeper soil medium
  • Can support trees
  • Can use a large variety

Green Roofs as Water Wise Landscapes

What is a Green Roof?

A green roof is any roof of a building or structure covered or partially covered with vegetation. Other names for green roofs include: eco-roof, nature roof, vegetated roof covers, and living roofs.

Green roofs have a long history dating back to the Hanging Gardens of Babylon and traditional sod roofs used on Scandinavia houses. Germany currently leads the world in green roof technology.

Many cities around the world are adopting green roof technology. Green roofs …