Ottostumm | Mogs

Swiss technology, italian design

A design story

Hot-rolled steel profiles – with their characteristic minimalist aesthetics – give shape to windows and doors with a unique character. Their slim design gives lightness to the frames, emphasizing the transparency of the façade.

The systems developed by Ottostumm I Mogs are born from the passion for the historic ferro finestra, which with its unmatched elegance and essentiality, has embellished for more than a century the facades of the world’s most beautiful buildings.

This timeless design has been restored with extreme sensitivity to detail in the Ottostumm I Mogs systems, declined in the different qualities of steel and in architectural bronze. The windows and doors made with Ottostumm I Mogs systems enhance the lightness of the frames, the balanced proportions of the overlapping systems and their exquisite finishes.

Bringing authenticity and beauty to the world of windows and doors. It was with this aim in mind that the company was founded in 2008, in response to the widespread use of materials such as aluminium or PVC. Bauhaus, with its large glass and steel openings with slender frames, was and remains the reference point: overcoming its historical technical limits and bringing back its true beauty is the mission. Swiss technology and Italian design: Ottostumm | Mogs is the perfect synthesis.

“In the late 40’s, when I was a young boy, my friends and I liked to spend hours in old factories, which were abandoned or partially destroyed. One of our favorite games, surely due to the historical occurrences of that period, was plane sighting. For this purpose one lucky boy was elected to scan the sky and the other were operating crank wheels and special gear to open and close endless lines of pivoting steel windows.”

Karl Otto Stumm


Ottostumm | Mogs systems are the result of a relentless pursuit of perfection and innovation, characterised by unique and authentic shapes, carefully studied and designed to ensure the creation of unparalleled windows and doors.

Every detail is precisely attended to, linked to specific accessories that enhance the intrinsic qualities of each element, resulting in windows and doors of extraordinary beauty and functionality.


With design and R&D offices in Italy and production facilities in Switzerland, Ottostumm | Mogs relies on a structured international network to realise the most prestigious architectural projects. It collaborates with the world’s most important architectural and professional firms.

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