The Alumasc Group is a company that designs, manufactures, and supplies building products and systems. It operates through three segments: Water Management, Building Envelope, and Housebuilding Products. The Water Management segment deals with the use, retention, recycling and disposal of water. The Building Envelope segment provides roof waterproofing systems, green and landscaped garden roofing. The Housebuilding Products segment offers cavity trays, soakers, ventilation, and other structural components.