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ZinCo-Proven System Solutions in the City of London

Flourishing wildflower vegetation at the Barbican Estate

One of the most recent projects ZinCo took part in was the replanting of Beech Gardens, forming part of the Barbican Estate in the City of London. This retrofit project was based on a new design concept by the Landscape Agency in York in cooperation with Nigel Dunnett from the University of Sheffield. To meet the requirement of a significant reduction of irrigation and maintenance needs for Beech Gardens, their design concept provided naturalistic meadow-like flower-rich vegetation being, however, robust and drought-resistant enough to tolerate low water availability and requiring only little maintenance throughout the year. ZinCo provided the necessary green roof system for this ambitious landscape scheme.

The long-proven ZinCo drainage element Floradrain® FD 60 forms the heart of the build-up providing for a balanced water-air supply in addition to draining off excess water and at the same time storing enough water given the absence of any additional irrigation. The ZinCo WSB 100-PO root barrier was laid out on top of the waterproofing to avoid any roof penetration and covered by an additional layer of ZinCo ISM 50 high-grade protection mat to protect the surfaces underneath from any mechanical damage. The ZinCo filter sheet SF was installed on top of the drainage element to separate it from the subsequent substrate layer and ensure permanent reliability and performance. The build-up was completed by a special blended intensive green roof growing medium which perfectly suits the planting scheme. The substrate depth varies from approx. 200 mm beneath the perennials to approx. 900 mm in areas where trees are planted.


  • Lise-Meitner-Straße 2, 72622 Nürtingen, Germany
  • ZinCo GmbH