We are considered pioneers of development. Simple proofs of this are the numerous attempts to imitate our product. Such was the case after the introduction of the "Belvedere Conservatory” line that for the first time in Germany, satisfied the design standards as well as attaining a high quality of wood construction.

Our window system ”Sprosse 22” is particularly popular, which was introduced by
our engineers in 1980. Since then the synthesis of traditional elegance and modern functionality have helped maintain the original character of thousands historic buildings, worldwide.

By closely watching other building cultures, we find solutions that are worth further engineering, for example Crank Out or Double Hung units. Some ideas come from our clients who demand unique custom products.

Our product overview allows a deeper view of our range.