Protan has been supplying roof coverings and membranes since 1972 and can document the long life of its products from many years of experience in the Scandinavian climate and extensive testing in its own and external laboratories. roof coverings and membranes are very flexible and withstand all kinds of extreme weather. They have been developed for the tough Scandinavian climate, so special attention has been paid to material properties at low temperatures. Long-duration tests show that, even after 30 years, Protan's roof coverings and membranes still retain their beneficial properties and will function for many years beyond their expected life.