GREEN & BLUE INFRASTRUCTURE
During the next phase of the green roof construction , a biodiverse growing media mix was deposited onto the geocomposite layer and levelled to a depth of 100mm . The material is lightweight to minimise loading on the roof structure and contains organic content to retain moisture and nutrients for growing the wildflower and sedum plants .
To complete the living roof installation a total of 4,622m2 of meadow planting was provided
by Wildflower Turf , in a ratio of 20 % grass / 80 % flowers including a mixture of 34 different flower species . The roof turf was grown at a local nursery especially for the project and designed to thrive in the exposed conditions . The turf was supplemented with 14,200m2 of Wildflower seed to boost the density of the meadow and encourage it to spread over the wider landscape .
The green roof is subject to an annual maintenance cut in late August / early September , once flowering plants have set seed and arisings are removed from the roof to avoid nutrient build-up . Cutting the plants back to 1 to 2 inches in length ensures that re-growth and species diversity continues year on year .
Insulation , water control membrane , the green roof and irrigation system were project managed by Geogreen Solutions and a five man team worked to complete the install . This was Geogreen ’ s largest install programme to date and in total 5,000m2 of green roof sedum and wildflower matting , over 6,000m2 of insulation board , geocomposite drainage and waterproof membrane , 28 tonnes of 20mm pea gravel for fire break borders and 12 arctic loads of 1m3 growing media bags were delivered and installed for the new services .
The BALI awards event and winners ’ presentations are being held at the JW Marriott , Grosvenor House Park
Lane Hotel on December 3 .
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