Depth of Growing Medium:
Live Roof 4" extensive modular system
Growing Medium:
LiveRoof® specified engineered soil, based upon German FLL granulometric distribution and 95+% by dry weight (92% in BC Canada) inorganic content for minimal shrinkage/decomposition.
Drainage Layer:
1/2" Modules are typically placed directly upon a heavy duty (typically roofing grade HDPE, polypropylene, TPO, PVC, or EPDM) slip sheet/root barrier of 45-60 mil. thickness with effectively bonded seams. This is placed as an additional protective barrier above roof waterproofing membranes. Alternatively low profile drain boards work well and manufacturers of cold fluid applied reinforced urethane membranes and polyurea systems typically warrant their systems for use in conjunction the LiveRoof® system.
