1.1 The purpose of this document is to provide guidance in the selection of a suitable waterproofing membrane within a vegetative roof system. The Guide offers various options for reviewing the membrane installation during and upon completion of the installation and prior to the vegetative components being installed. This Guide applies to membranes that do or do not require UV protection. For the purpose of this guide, the supporting structure and roof deck are assumed to be mechanically and structurally sound and will accept the weight of the vegetative roof system including the membrane, insulation, and other roofing/waterproofing components including all components related to the vegetative layers as well as the required design loads. Slope to drain at the membrane level is preferred and should be included where possible Providing a replacement or a re-cover vegetative roofing system on an existing building may require that the support structure be reinforced so that it can safely support the additional weight of the vegetative roof system and also provide the minimum live load capacity required by the building code.
As vegetative (green) roof systems create unique situations beyond what is typical for roof waterproofing, selection criteria will be useful to designers of vegetative (green) roof systems.
Keywordsvegetative roofing; roof membrane; root resistance, ultraviolet (UV) resistance
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top