Green roofs & living walls

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SUDS training www.ciria.org/suds Green Roofs & Living Walls Gary Grant greeninfrastructureconsultancy.com

Transcript of Green roofs & living walls

Page 1: Green roofs & living walls

SUDS training www.ciria.org/suds

Green Roofs & Living Walls Gary Grant

greeninfrastructureconsultancy.com

Page 2: Green roofs & living walls

SUDS training www.ciria.org/suds

Multi-functionality

Multi-functional design

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Design + Planning: Landscape Architecture Community Forests North West: Mabel Tylecote Building April 2010

Biodiversity

There is much information published today on the link between green roofs and biodiversity and over the past few years researchers have turned their attention to the role that green roofs can play in the conservation of biodiversity in towns and cities, where natural habitats are few and far between.

The biodiversity of the options differ primarily in their vegetation species selection, and secondly with the materials making up the substrate layer. Collectively these combine to increase the biodiversity value of the new habitat.

For example;

Area 1: Provides a range of substrate depths from 50-150mm. It is anticipated that this will infl uence the colonisation of the wildfl ower species across the mounds.

Area 4: Includes 10% sand lenses within the substrate mix. This is included with the anticipation that miner bees (familys Andrenidae & Anthophoridae) will be attracted to the roof.

Appearance

The overall appearance of the roof is affected by the vegetation species that are selected. The opportunity to instal a range of green roof types on the Mabel Tylecote Building increases the opportunity for biodiversity whilst also creating an interesting mosaic of different colours and planting characteristics. The differences in appearance can be gauged from the photographs illustrating the planting types earlier in this options report.

These photos, cross-referenced with the layout options, provide an indication of the what the overall appearance of the roof will be when in full bloom.

Materials

The opportunity to specify a substrate system allows for a greater depth of growing medium providing an extended choice of suitable plants for a client. It can also provide a cost effective solution for larger roofs. The substrate recommended for the Mabel Tylecote Building is a specifi c mix comprising:

• Crushed brick 80%• Organic material 20%

Opposite are images from Bauder UK, a green roof component manufacturer.These illustrate the typical layers that make up an extensive substrate system (such as outlined in this proposal) and below a detail of a typical drainage layer.

Typical drainage layer(lightweight HDPE)

Planting

Substrate

Filter sheet

Drainage layer

Protective mat

Root barrier

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Transport for London HQ

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SUDS training www.ciria.org/suds Biodiverse extensive green roof at PWC, More London

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SUDS training www.ciria.org/suds Lexis Nexis, Farringdon St

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SUDS training www.ciria.org/suds Lendlease HQ Roof Garden

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SUDS training www.ciria.org/suds The Lancet

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Cambridge Conservation Initiative University of Cambridge David Attenborough Building

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SUDS training www.ciria.org/suds David Attenborough Building Interior Living Wall

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SUDS training www.ciria.org/suds Living table

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