Influence of substrate depth.
Nigel dunnett roof garden.
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The initial concept for the scheme also included a green roof for the portico which would have been the starting point for that storm water chain.
Above the roof waterproofing layer there is a modular drainage sheet that allows excess water to drain from the system but also acts as a permanent reservoir of water at the base of the gardens.
He and colleague james hitchmough led the team behind the olympic park london back in 2008.
He is director of the green roof centre sheffield and acts widely as a consultant on green roof design and planting and sustainable garden and landscape design in general.
Dunnett n nagase a hallam a 2008 the dynamics of planted and colonising species on a green roof over six growing seasons 2001 2006.
He knows his stuff having completed various high status projects.
The green roofs on this house provide additional wildlife value to complement the meadow plantings at ground level.
Above this layer sits a filter fleece that lets water through but which prevents the growing medium from being washed away into the drainage layer.
Nigel dunnett on pinterest.
The john lewis rain garden.
However subsequent structural analysis proved the portico to be unsuitable for supporting a green roof.
Nigel dunnett the landscape agency.
Photo by nigel dunnett and noël kingsbury green roofs can be installed on sloping roofs although they will be subject to greater moisture stress than on flat or gently sloping roofs.
Urban ecosystems 11 4 373 384.