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Depending on the climate, local regulations on thermal performance, and historic guidelines, OTTOSTUMM Steel Windows offer a wide range of window and door systems. Available in steel and architectural bronze, we are able to match a broad array architectural styles. These products are ideal for the window renovation in historic buildings of the 19th and the 20th centuries. Steel Windows are a very distinctive choice for high-end residential and boutique commercial buildings. Windows and doors crafted from our profiles are often a focal feature in many prestigious estates and custom homes.


FerroFinestra, literally meaning “window iron,” stands for an accurate selection of hot rolled, cold formed and laser welded steel window profiles. Steel windows have been, and still are, the preferred choice of architects. Especially when their function is not merely to close a hole in a wall, but also to provide a significant contribution to the character and overall appearance of a building. The minimalist aesthetics of solid hot rolled steel profiles and their ability to shape windows is unique. The crisp slender lines render a quality of lightness to the frames, emphasizing façade transparency. This elegance is impossible to match with the bulky profiles of alternative materials.


Bronze is one of the oldest metals known to man since the beginning of the Bronze Age over 5,000 years ago. It is considered a “living material,” subject to a natural oxidation or weathering and its natural colors range from a copper red fading through golden yellow to end in the different shades of classic browns. It emanates a warmness difficult to match with other metals. Contemporary architecture is rediscovering the value and beauty of this noble metal, which was the principal performer in windows and doors of representative commercial buildings and residences of the 18th and 19th century.

Mogs Window Systems

The designation “Mogs” stands for a large family of window profiles, which has been designed to foster a high level of insulation, burglary resistance and durability. A wide range of materials and finishes characterize the thermal barrier range, identified by the suffix “TB”. The system stands out for its clean design and minimalist aesthetics. Mogs M65 TB, in its various forms, is the only cold formed thermally insulated profile system made from 2 mm steel.

List & Slide

OTTOSTUMM’s thermal barrier sliding door systems are suited for larger frame dimensions and weights that are outside the ordinary. The profiles are available in steel, cor-ten steel, and marine grade stainless steel.

Curtain Walls

OTTOSTUMM is committed to furnishing architects the components needed to create innovative and visually impressive buildings. Fulfilling this ambition requires not only distinctive products that represent the architect’s vision, but also technically performing accessories as well. OS-TEC stands for a set of solutions developed for large eye-catching steel-glass curtain walls.

Internal Partitions

Thanks to the high stability of solid steel and architectural bronze profiles, partitions can be designed with narrow face widths and particularly large areas of glass, that provide maximum transparency and light penetration. OTTOSTUMM offers several design approaches for interior spaces where room divisions become decorative design elements which divide large spaces into dedicated areas for individual use. Steel and architectural bronze are unique materials with their multitude of natural surface finishes making them a distinctive choice for contemporary multi-functional partitions that embrace the design philosophy of open, transparent and communicative ambience.

If you can envision it, then we can build it.
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