The BLUE ROOF 129mm – WARM / COLD – GREEN FINISH system is calculated by our Design Team to restrict outflow rates within the development’s discharge consent limit.

The system is typically designed to attenuate a 1-in-100 storm event (data extrapolated from either the local FEH or FSH flood report), plus 30% allowance for the effects of climate change.

The choice of soft landscaping materials specified are of a high standard and the inclusion of large areas of green spaces and substantial planting can create valuable new private gardens and amenity spaces.