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ICB (International Construction Bureau) Ltd is one of the UK's leading suppliers of roofing products and systems offering green, sustainable solutions to meet every type of design application. Products include single ply roofing systems from alwitra^®, one of Europe's largest and most respected manufacturers, DIADEM^®, the ultimate green roof, with over 300 different components, Barrial^® - Europe's best selling safety rail and balustrade system and the latest innovations in flat roof Photovoltaic systems; Evalon®Solar and Solyndra.