Residential OKEL GmbH & Co. KG, Diemelstadt

Following five months of conversion and renovation work, the new rooms in a historic 14th century timbered building were ready to be occupied in August 2011. The previously unused, generously sized attic of the building, which previously housed a pharmacy, was converted into a living area and a cultural centre with a private gallery. As the building comprises front and rear sections with eaves at different heights and separate roof coverings, the room layouts posed a challenge. It was essential that the interior timber structure was retained. In addition to refurbishment of the wooden frame, various drylining solutions were used. High-quality residential and exhibition rooms were ultimately created in an area of 300 square metres.

Key Achievements

The German Judging panel called it, "A fascinating and demanding stand-out project technically and in terms of design," The integrated platforms and openings emphasize the loft atmosphere and flowing lines between the residential and gallery areas. The project demonstrates perfectly how a high-quality, timeless decor can be created in a historic building using drylining materials. The supporting timber framework was completely reconditioned and supplemented by innovative drylining elements.

Key Challenges

As the building comprises two connected attic sections (front and rear sections), room layouts existed, and had to be connected. While the rear section of the building features a complete floor with timber framework walls, the roof in the front section of the building slopes down to floor level. The three roof areas of the building sections are separated by a thick gable wall and connected by masonry openings. The renovation work involved connecting the three attic levels. Specific planning and installation requirements were needed for the lighting and air conditioning. The wall surfaces for exhibits had to be erected facing away from the windows to avoid direct light and air conditioning was achieved via heating and cooling systems integrated into the surfaces of the room.


Building owner: Udo Rosendahl, Warburg
Architect: Ingenieurbüro für Bauwesen Mark Laszkiewicz, Warburg
Main contractor: Okel GmbH & Co. KG, Diemelstadt
Photographer: Henry Koch
Saint-Gobain Team: Henning Häusler

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OKEL GmbH & Co. KG, Diemelstadt

The calling card of Okel GmbH & Co. KG is the representative and functional implementation of construction projects. Expertise, reliability and a good price/performance ratio are principles which are firmly anchored in the Okel GmbH & Co. KG corporate policy. Founded in 1959 as a painting company, Okel GmbH & Co. KG now offers all painting, carpentry, glazing, drylining and plastering work from a single source together with the manufacture of prefabricated elements. The workforce currently comprises an average of 60 craftsmen.