OTTOSTUMM's mission is to support architects and designers with modern thermal barrier steel fenestration systems, which not only preserve the character of national heritage buildings, but also offer the possibility to use windows and doors with highest visual qualities in contemporary architecture. Their products have a very narrow focus and are ideal for renovating steel windows in historic buildings of the 19th and 20th centuries, as well as for indoor and outdoor use in highly design-oriented villas, boutique commercial and institutional buildings. Windows and doors crafted with OTTOSTUMM's profiles are often the most noticeable feature of prestigious properties.