The formative roof geometry of a single-family house near Hamburg acts like "a ship in the forest". The flat clay roof tiles in noble graphite represent the hull.
Single-family dwelling in Nordheide, near Hamburg, Germany
Nils von Minckwitz, Berlin
Actua 10, true graphitep
Single-family house near Hamburg
Single family house near Hamburg
The developers, a couple with careers in the media, were not satisfied with the double-pitched roof originally specified by the building authorities, and so they looked for a more interesting alternative. In trips abroad, the couple was particularly impressed by large barns in Ohio with their highly rounded roofs. In Scandinavia, they were struck by the contrast between the dark roofs and light wooden façades. These two impressions gradually gave birth to an idea of a house with a large, convex tiled roof. The house needed to consist of natural materials and be a safe refuge for the young family far away from the hectic day-to-day world of the media.
The architect, Nils von Minckwitz from Berlin, justly compares this roof design with “a ship‘s hull in a sea of pines” since the zeppelin roof is also termed a “hull roof”. The flat, true graphite Koramic Actua 10 roof tiles represent the dark hull of ship. In addition, notes Minckwitz, “roof tiles are a modern phenomenon and hence give the traditional roof shape which initially arose in the 1920s a new, modern twist.” The roof is covered with tiles from stem to stern and takes up approximately one-third of the height of the building. Starting at eaves which are vertical like a façade, the roof curves protectively over the top floor and then runs at an approximately 30 degree angle to the ridge. The half-offset roof tiles emphasise the horizontal lines. Even though the roof is covered with flat roof tiles, the curve seems natural. The special, straight Actua ridge is an appropriate choice for the design.
In addition, the “family ship” in Nordheide is a thoroughly modern structure. With at least 16 cm of insulation in the walls, 24 cm in the roof, triple glazing, solar and wood heating, the single-family house made of natural materials is largely energy self-sufficient. There are no real heating costs to speak of. After all, the house is in the middle of a forest.
The zeppelin roof is a rare roof design related to the barrel roof, and is generally not found in most reference works for roofers and carpenters. However, the designation “zeppelin roof” is used by educators in the roofer‘s school in Lehesten, Thuringia. In contrast to a genuine barrel roof that does not have a slope or a ridge at the highest point of the roof, the zeppelin roof has a slope and a ridge at the top which allows it to be completely covered with roof tiles. This particular round roof design first came into being around 1920 and is characterized by the so-called Zollinger style. Architect Fritz Zollinger, formerly head of the building department in Merseburg near Halle, patented the wood-saving Zollinger slatted roof. His economical design offered large, support-free attic space and, as a side-effect, created a new roof shape. The technique was used until approximately 1940 for businesses and residences in Germany, Europe and the USA. The roof of the single-family house in Nordheide has nothing but its shape in common with the Zollinger design.
Expectations and demands are high, the wish list is long. This presents architects and clients with complex challenges. In consideration of the demands and expectations relating to quality of living, indoor climate, health and energy-efficiency, bricks, clay blocks and roof tiles prove to be very valuable building materials.