BauderBLUE STORMsub

Creating a blue roof within a green roof where the substrate and water retention board attenuate stormwater.

Extensive or biodiverse vegetation finishes can be coupled with a biosolar PV array for maximum environmental advantage.

Green roofs naturally, as part of their multi-layer design function, soak up water for the plants to use, retain it, and delay its run-off. Typically, a green roof will reduce annual run-off by 40-60% per annum*. However, simply using a green roof to attenuate water run-off has a major disadvantage, once saturated there is no control on the rate of water discharge so on its own it cannot be used to achieve a particular discharge rate.

The BauderBLUE STORMsub system utilises our BauderGREEN RE 40 drainage and attenuation board and BauderGREEN SUB-RE UK adapted lightweight substrate as the specific water attenuation components; all other components in the green roof are specified as normal to support the vegetation and safeguard the waterproofing.

When to specify

When a vegetated green roof finish is required the BauderBLUE STORMsub system creates a blue roof within a green roof build up where the substrate and water retention board attenuate stormwater. Extensive or biodiverse vegetation finish can be coupled with a biosolar PV array for maximum environmental advantage.