The FLL - Green roof guideline is the standard regulatory work for the intensive greening, simple intensive greening and extensive greening of already sealed roofs and building covers. It also contains details of care and maintenance work to the greened areas and service information for the technical installations. The FLL - Green roof guideline is also valid for other greening works on roofs and building covers (e.g. special tree plantations, useable grassed areas and other usable areas). Due to the special requirements of these works, deviations from parts of this regulatory work and the examination of other object specific regulatory works may be necessary. The FLL - Green roof guideline complements the appropriate standards of the Construction Tendering and Contract Regulations – VOB – and the German Standards Institute – DIN – for landscape contractors. This applies to the execution of soil, planting and lawn works (soft landscaping) and the associated maintenance.
Great detail is paid in the guidelines to the fundamentals of planning, the requirements of the construction to be greened, the demands on building materials and plants, regulatory statutes, required testing and contractual obligations. Furthermore, the possible types of greening and their functions and effects are demonstrated. The appendix contains orientation figures for bearing loads and water storage, testing methods, and the FLL – method for examining the root resistance of root protection membranes and coatings.
Area of Validity/Purpose; Standards and other Guidelines and Codes of Practice; Types of Greening and Forms of Vegetation; Functions and Effects; Requirements related to Construction and Materials; Technical Requirements (Construction); Requirements for the Construction of Vegetation Areas; Drainage Course; Filter layer/fleece; Vegetation Support Course; Requirements of Seeds, Plants and Vegetation; Plants and planting; Development care, maintenance, servicing; Erosion protection; Warranty, periods of limitation; Testing; Appendix 1 – Informative orientation values for load bearing and water storage, Appendix 2 – Investigative methods for vegetation substrate and drainage aggregates for green roofing, Appendix 3 – Procedure for investigating resistance to root penetration at green-roof sites (1999 edition, with editorial changes dated 2002/2008)