Alumasc Exterior Building Products Ltd has been a major force in the UK Construction Industry for over 30 years. During that time Alumasc products and systems have been specified on some of the most prestigious buildings in all sectors, throughout the UK. Highly regarded brands such as Harmer, Apex, Derbigum, ZinCo, Hydrotech, Armaseam and M.R., together with Alumasc's well known architectural rainwater range are leaders in their respective fields.

Ongoing investment in engineering skills and state of the art technology combined with an ingrained service ethic, provides construction firms, architects, specifiers and building clients with the products, technical support and lifecycle support they require for their projects. Alumasc Exterior Building Products generates an annual turnover in excess of £25 million, primarily by specification, of five distinct but interrelated categories of product and system: