Unfortunately there are many green roofs that have been installed with green roof medias that were not engineered correctly. Many of these green roofs may be failing because an inappropriate or non-existent media testing method was provided at the time of installation.

Currently, the most widely recognized standards for testing green roof media are those developed in Germany by the Landscaping and Landscape Development Research Society (FLL) and published in the Guideline for the Planning, Execution and Upkeep of Green Roof Sites. These standards designate specific test protocol to follow as well as criteria to meet based on green roof type. More recently, a U.S. task force has been established to develop green roof test methods and standards through the American Standard Testing Methods (ASTM) organization. Our Agricultural Analytical Services Laboratory partners employ the FLL test procedures on a routine basis and AST methods as they are available.

At Hanging Gardens we provide testing for both existing green roofing medias in needs of remediation & improvements and new green roof medias that need testing to ensure their viability. Please contact Hanging Gardens to ensure that your green roof has a media that will last the life of your roof.