Manufacturers Polypipe Terrain has enlisted the help of landscape architects Gustafson Porter and Bowman to design, manufacture and install a roof garden at the Seacoal House building.
With a stormwater management solution and attenuation system being crucial for the development, the result was a permeable surface with aluminium detailing.
Polypipe’s Permavoid was used in a membrane to manage and control stormwater run-off, which delivered the green roof surrounding.
The Permavoid cells used were 85mm in depth and had a 95% void ratio. They were joined by a mechanism that formed an interlocking ‘tensile raft’.
The void ratio of the Permavoid cells allowed the architect to reduce the number of rainwater outlets used in the roof.
Donncha O Shea, partner at Gustafson Porter and Bowman, said, “By installing this new system retrospectively, we have been able to successfully develop a stormwater management system for an existing building. It shows how tall buildings within our city centres can adopt this technology.”
Nicholas Wright, national project manager for Water Management Solutions at Polypipe Terrain, said, “We have designed, manufactured and installed many Permavoid systems in inner city areas, whether they be at ground, podium or roof level. When Gustafson Porter and Bowman approached us, we knew we could come up with a system that would work for them.”