Greenroofs Ltd Stormwater Management & Rainwater Retention

Product Description

Green roofs reduce rainwater run off by a number of processes:

• Retention of the rainwater in substrate and drainage layers.
• Uptake and release of water from the substrate by the plant layer. Water is transported from the root to the leaf and lost through the leaf surface – a process kn own as transpiration.
• Solar driven evaporation of water from the substrate.
• Wind disruption of the still, humid air layer (known as the boundary layer) over the plants and substrate increasing the rate by which water is lost to the atmosphere through evaporation and transpiration.

The ideal solution would be to control water run off at source. However, it is difficult to install containment measures within the urban area where space is at such a premium. Roof planting offers what may be the only real solution.