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Header image shows a green roof in Mayfair, London maintained by P&P’s maintenance crew.

Case Study: Restoration, maintenance and biodiversity, Mayfair

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Bringing biodiversity to sedum

  • As with all living roofs, extensive/sedum roofs have many benefits compared with normal flat ‘un-living’ roofs. These include helping to:
    • Improve the ‘roof-scape’ of the city
    • Extend the life of the roof
    • Reduce building energy consumption/costs
    • Reduce the urban heat island effect
    • Reduce surface water runoff
  • However roof gardens that are only planted with sedum are not as beneficial as other plants to wildlife, nor are they as visually appealing.
  • The owners of these office blocks in London’s exclusive west end, brought in the P&P maintenance team to tend and renovate three roof gardens covering 200m2 to introduce more biodiversity.
  • The strategy:
    • The sedum beds that were in an unhealthy condition were replaced with fields of lavender, bordered with other herbaceous plants.
    • The sedum beds that were in good condition were inter-planted with lavender.
    • Lavender – like sedum – is a low-maintenance, drought-tolerant plant, but it is far more beneficial to pollinators such as bees and butterflies.
    • Anyone who has enjoyed the lavender fields of France, knows that lavender looks and smells divine.
  • The regeneration started in 2018. The maintenance team visit the three roofs monthly to tend to plants and remove the weeds.

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Extensive sedum – monoculture

Image shows the sun catching roof of sedum, before lavender is planted by P&P’s maintenance team.

Sedum inter-planted with lavender

Image shows a member of P&P’s maintenance crew, attached to a fall-arrest system, on a sedum and lavender green roof in Mayfair, London

Pollinator friendly Lavender

Image shows a roof planted with lavender, restored and planted by P&P’s maintenance team.
Living roofs Maintenance FAQ Case studies

Latest maintenance case studies

Old Street City Cloisters Landscape Maintenance

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The Pritchard and Pritchard team have been revitalising the living wall and planted landscapes at this fantastic mixed use space in Old Street. Remedial works…

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Pritchard & Pritchard’s maintenance team were tasked with restoring four roofs where the weeds had taken over, to their former glory. Replanting completed 2019; maintenance…

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This gorgeous wildflower meadow terrace garden in London Victoria needs a twice yearly visit from P&P’s maintenance team to keep it looking its best.

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