Introduction to the German FLL-Guideline for the Planning, Execution and Upkeep of Green-Roof Sites

Urban Farm DB summary

This paper, hosted by the U.S. EPA, introduces the German non-profit FLL's (founded 1975) 'Guideline for the Planning, Execution and Upkeep of Green-Roof Sites' (latest edition January 2002, English version 2004) to the American market. The guideline draws on the experience of roughly one billion square feet of green roofs built in Germany, and includes specific standards such as organic matter content limits for growing media (e.g. 6.0% by dry mass or less for intensive green roof media above a given density) and a root-penetration resistance test (revised to a two-year protocol in 1995, with about 70 membranes having passed it so far).

Only numbers and their conditions are stored, as structured data — never the source's own sentences. Metric and condition names stay in English, as coded.

• 1,975 year

  organization founding year(fll guideline)

  Policy

  region

  Germany

  organization

  FLL

• 6 %

  organic matter content max(green roof substrate)

  SoilControl: intensive green roof media with volume weight above 0.8 g/cm3

  method

  loss on ignition at 550°C, dry mass basis

• 70 count

  root resistance certified membranes(green roof membrane)

  Design

  note

  approximate figure, some also available in US/Canada

• 1,000,000,000 sq_ft

  cumulative area built(green roof germany)

  Climate

  region

  Germany

  note

  described as 'almost one billion square feet'

Direction of conclusions

Each author conclusion is recorded only as a coded direction per topic. Read the original for the conclusion itself.

• Policy and governanceSupportsWith caveats