by Brianna Crandall — September 15, 2010—A proposed new ASTM International standard focuses on the growing popularity of vegetative, or green, roof systems, in which traditional roofing material is replaced or supplemented with vegetation. The proposed standard will address an important aspect of designing this kind of roofing: determining the proper roofing and waterproofing membrane for a particular system.
ASTM WK29304, Guide for Selection of Roofing/Waterproofing Membranes for Vegetative Roof Systems, shows how a suitable membrane for a vegetative roof system will satisfy both the roofing and waterproofing requirements and functions for the building and also be an effective substrate that promotes the healthy growth and successful function of the green roof.
According to ASTM, an effective roofing and waterproofing membrane will resist damage to the building’s roof envelope from common conditions such as excessive roof traffic, membrane abrasion and impact, plant root penetration, ultraviolet damage, exterior fire, thermal shock and wind events. In addition, a proper membrane would comply with local, state and federal building codes and meet the industry’s test approval standards.
ASTM says that all interested parties are invited to participate in the development of WK29304, which will be available on the ASTM site for purchase.
