Green Roof Technology

Anatomy of a Green Roof Assembly

Image Courtesy: Green Roof Service LLC

Typical Green Roof Assembly

A green roof assembly consists of components designed to support the horticulture as well as components to help perform the traditional functions on a roof – waterproofing and channeling excess water towards the drains.  These layers are identified as:

  1. The Roof Deck with insulation and waterproofing
  2. Protection and moisture storage layer
  3. Drainage Layer
  4. Filter Layer
  5. Growing Media
  6. Green Roof Plants

These components work together as a system to perform all the functions of a green roof: waterproofing, drainage, water retention, evapotranspiration and supporting the growth of the plants.  Proper design and specification of each component is critical to ensuring the system as a whole performs properly.

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