Green Roof Substrate

A green roof is a unique environment that calls for a unique growing medium. With almost 2 decades of growing sedum and wildflower blankets for use on extensive green roofs, Turfonline have perfected a growing medium that meets the needs of both the building and the plants. Our specially blended extensive green roof substrate is tested to the German FLL guidlines (2018) and it provides the perfect base for extablishing a green roof.

An extensive green roof needs to retain moisture to support the plants, whilst also remaining lightweight. Turfonline green roof substrate is made from recycled materials giving a low density, low nutrient base with optimum water retention properties.

Also available in bulk bags

Key Points

• Lower density growing medium for less weight loading on your building. Dry weight approx 0.95kg/l, saturated weight approx 1.3kg/l per bulk bag
• Open structure does not compact and is free draining
• Optimum water retention for plants to thrive yet not prone to waterlogged
• Larger particles 0-14mm – will not silt up drains, settle or wash away in heavy rainfall
• A blend of organic and mineral material minimises the potential losses due to soil oxidisation
• Produced to FLL guidelines – approved for use on living roofs

Composition

70% Mineral Material
30% 10mm PAS100 certified green compost

Coverage

Each bag will cover an area of 1m² to a depth of 25mm

Recommended Depths

Biodiverse wildflower roof 150mm
Sedum only roof 60mm