An extremely delicate aspect such as the safeguard of persons and belongings against fire merits the highest protection. You can relay on the greatest number of official acknowledgments in the field with Dierre - numerous certificates and type - approvals, and the maximum commitment in the design, laboratory tests and technological development of the production line. Quality controlled, consistent and law conforming products, completely trustworthy both for their fire resistance as well  as for the functionality of the opening system, pleasing to the eye and every attention given to the smallest details are yours.