Savannah two-layer systems employ a lightweight growth medium over a granular drainage layer, with a root-permeable separation fabric maintaining the layer integrity. Replicating natural systems, Savannah roofs promote strong plant growth by draining and distributing water efficiently and concentrating root mass in a stable temperature and moisture zone.
To reduce heat stress in semi-arid climates, Roofscapes, Inc. introduces a permeable thermal shield above the drainage media. Highly efficient base capillary irrigation may also be used.
Wind Erosion Stabilization System
Lightweight Growth/Drainage Medium
Root-permeable Separation Fabric
Thermal Shield (for semi-arid climates)
Lightweight Granular Drainage Media
Protection/Water Distribution Fabric (for unirrigated systems)
Capillary Fabric (for irrigated systems)
Root Barrier Membrane (when required)
Waterproofing
Typical Depth: 4 - 6 inches
Max. Saturation Weight: 27 - 40 lbs/square foot
Typical Plant Families
Sedums & Herbs
Sedums & Meadow Grasses
Sedums & Meadow Perennials
Optional Irrigation: Base drip with capillary fabric
Wind Erosion Stabilization System
Optional Irrigation: Base drip with capillary fabric
