Design a green or living roof system

A green or living roof is a low-slope roof planted with vegetation.
These carefully designed and built roofs usually consist of a structural roof deck layered with waterproofing, aggregate, lightweight soil, and vegetation. Sod, moss, or local wildflowers are favorites. Regular maintenance is needed to keep plants healthy.

Green (vegetated) roofs absorb rainfall during storms and release the water slowly. This reduces storm-water surges and downstream flooding. Water management for a green roofRoof system in which living plants are maintained in a growing medium using a membrane and drainage system. Green roofs can reduce storm-water runoff, moderate temperatures in and around the building (by providing insulation and reducing heat island effect), as well as provide a habitat for wildlife and recreational space for humans. When properly constructed, green roofs can increase roof durability because the roof assembly’s air and water barriers are buffered from temperature fluctuations and UV exposure. requires the same attention to detail as any other low-slope roof.

A vegetated roof with wildflowers boosts biodiversity, particularly in urban areas, reduces the urban heat island effect, and improves local air quality.


LEED for HomesLeadership in Energy and Environmental Design. LEED for Homes is the residential green building program from the United States Green Building Council (USGBC). While this program is primarily designed for and applicable to new home projects, major gut rehabs can qualify. : Under Sustainable Sites: 2 pts for Management of Run-off from Roof
NGBSNational Green Building Standard Based on the NAHB Model Green Home Building Guidelines and passed through ANSI. This standard can be applied to both new homes, remodeling projects, and additions. /ICC-700:Under Ch. 5–Lot Design, Preparation, and Development: 3 pts. for storm water management; Under Ch. 6–Resource Efficiency: 3 pts. for green roof system

Learn more in the Green Building Encyclopedia:

There Are Many, Many Green Roofing Choices

Further Resources
Green Roofs: Using Roofs for More Than Keeping Dry
Two Books on Green Roofs
Roof Gardens:
History, Design, and Construction

Green roofs:

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