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Alwitra's Evalon V membrane has been used as part of the waterproofing layer on the roof of Hereford Cathedral School's pre-prep building. The roof comprises 311m 2of grass/turf installed over a drainage layer, insulation and Alwitra's Evalon V membrane. Sitting at the heart of ICB's green roof system, the Evalon membrane has, its makers claim, the flexibility and versatility for use on green roof projects of any scale.


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