Alumasc Create Flourishing Green Roof at Botanic Gardens

One of the UK’s major botanic gardens has chosen an Alumasc ZinCo extensive green roof system to create an environmentally friendly roof for its visitor centre.

Founded in 1898 by Arthur Kilpin Bulley, Ness Botanic Gardens on the Wirral was gifted to the University of Liverpool in 1948. The £2 million visitor centre has been tailored for sustainability and to be sympathetic to its environment. The extensive sedum planting scheme for the roof of the visitor centre was carefully designed by Ness Botanic Gardens to achieve their ambitions for low growth height and all year round colour variation with minimal maintenance requirements. As well as the ecological benefits, the extensive roof provides protection to the waterproofing and significantly reduces water run-off, which in turn lessens the risk of flooding.

Waterproofing is at the core of any roofing project and the 600sq m roof also features Alumasc’s Derbigum ‘warm roof’ waterproofing system. Derbigum was chosen by the architect, Cass Associates of Liverpool, for its excellent long term performance and because it could accommodate the water retention levels required within the ZinCo green roof build up. Derbigum, a BBA certified, tough, flexible, composite sheet, combines longevity with ease of application for structural decks. Ideally suited for flat roofs built to warm roof configuration, it can accommodate all categories of Alumasc’s ZinCo Green Roof from extensive, semi-intensive and intensive planting schemes.v The roof was installed by Alumasc approved contractor, M&J Roofing Ltd.

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