• The Chase Technology Centre, Malvern, Worcester.
  • Lynton House
  • Leys School
  • Harrogate International Centre
  • Inventux Farm Project
  • Neasden Lane
  • Kearsley West School
  • Medina High School, Evalon®-Solar
  • Visions, Chaddesley Glen, Poole
  • Barking Town Hall
  • Tiddington Care Home
  • St Annes Primary
  • Elm Avenue, Poole
  • Mariners Wharf
  • Brakenhale School
  • Stradella Road, London
  • Hartlepoole Police
  • The Royal Botanic Gardens
  • Eaton Rise
  • Sandbanks
  • Tanfield House
  • The Solaris Centre in Blackpool
  • Glades Arena Kidderminster
  • St Marys School Bognor
  • Huts in Blyth, Northumberland

Green shoots of recovery at hospital

Friday November 6th, 2009

John Radcliffe Hospital

A sensory roof garden, especially designed for use by recovering patients at the John Radcliffe Hospital in Oxford, has proved to be a massive success both as a major amenity and in helping the sick back to full health.

A sensory roof garden, especially designed for use by recovering patients at the John Radcliffe Hospital in Oxford, has proved to be a massive success both as a major amenity and in helping the sick back to full health.

The garden, developed using EvaGreen components from ICB (International Construction Bureau) Ltd, provides shaded areas and comfortable seating, ideal for patients who want some fresh air and rest outside of the ward environment.

EvaGreen components were used extensively over the 300m2 of roof garden designed by GBS Architects and installed by Landscapers Hickman Brothers. It incorporates a wide variety of surfaces and plants - a mix of intensive, extensive and hard landscaping areas.

As well as the environmental benefits, now installed, the EvaGreen garden has instantly extended the life of a roof by offering greater protection to the waterproof membrane from thermal shock and the English weather. The roof garden also acts as a highly effective insulator, helping to reduce heating and air conditioning costs.

The original existing hospital roof consisted of concrete paving slabs on a bed of asphalt. This was an ideal base for the EvaGreen Green Roof, which is compatible with every type of waterproof membrane, as it eliminated the need for remedial waterproofing. A root resistant layer however, was still required.

This is also part of the EvaGreen range and a EvaGreen FLW-400 root barrier was loose laid with 1000mm laps. Whilst the decking was laid on battens directly onto the pavers, areas where vegetation was to be sited were covered by fleeces and drainage boards. For the extensive areas the EvaGreen VLU-300 protection fleece provided the base for the 25mm drainage board and a VLF-150 filter fleece.

Recycled PE gravel boards were used as edge retaining profiles to the extensive areas. These were planted with a variety of sedums, house leeks, grasses and sub-shrubs, such as rosemary which provide a delicate aroma.

The intensive planted areas were enclosed using over 70m of EvaGreen RDA-40 edge kerbs clad in solid oak strips. The slightly larger 40mm drainage boards were used here to retain more water for the 600mm+ substrate depth which would accommodate a number of ornamental grasses and trees such as maple. Finally, EvaGreen inspection boxes (KSR-400) were installed over outlets to aid maintenance and drainage channels were installed around thresholds to help comply with current building regulations.

For true versatility, the EvaGreen system comprises over 300different components. These include everything from traditional sedum mats through to drainage layers, edge trims and safety harnesses for maintenance. This means any project, however ambitious, can receive a bespoke solution that will meet its objectives - practically and visually.

 

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ICB (Waterproofing) Ltd - Roofing Products and Sustainable Roofing Solutions, Poole, Dorset

 
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