– Green Roof Guidelines –
Guidelines for the planning, construction and maintenance of green roofs

Issue 2018, DIN A 4 brochure, 150 pages, DIN A4 PDF-downloadfilie,

with
Investigation methods for growing media and drainage layer bulk materials for green roofs

and
Method for investigating the root resistance of membranes and coatings for green roofs

1999 edition, with editorial changes 2002/2008 as well as
supplementary notes to "Requirements for transcription / renewal of test certificates"
(adopted and implemented by the FLL presidium at the end of 2016)