Tetrotecture By Stefanie Hünitzsch & Irina Schustow


​By Stefanie Hünitzsch & Irina Schustow

In our vision we imagine the rooftops of Berlin as  playgrounds to realize individual and liveable structures. Our Plan B ist to approach rooftops in a playful way by using a tetris kind of system. 

The combination of tetris and architecture, that we call Tetrotecture, allows a contemporary way of adding storeys to an existing building. By using wood, new structures can be realized in a fast and simple way by using sustainable materials. 

Individual units, designed for the needs of their inhabitants, are being put together as a coherent structural system, but still maintain their modular design. Also the structure of each existing building can be continued individually in the new design on top of the building. 

Even the sphere shaped structure of the TV tower can be repeated on top of the original sphere, constructed of bowed Kerto-LVL beams, giving new space 
for touristic but also for individual purpose. It is assumed that not only the population of the cities will increase but also the number of tourists visiting the cities. 

For our construction we have chosen floor slabs in Kerto-Q LVL made of massive veneers, glued together crosswise to stay as natural as possible. 

Within the building the natural insulation of the wood is being used instead of adding insulation. The whole slab material is produced by the natural energy oft he sun and needs no additional energy like for the production process of insulation. Also, this sustainable and fast way of construction creates a natural and pleasant room climate. By using a high amount of massive wood the benefits of carbon sequestration can be used most effective. 

Using Kerto-Q LVL panels for floors and ceilings allows high flexibility in designing the floorplans for future inhabitants. For a more lightweight solution the horizontal structure  made of  18 cm massive veneer lumber can also partly be replaced by Kerto-Ripa roof and floor elements for spans less the eight meters. 
Using Kerto-S LVL beams as a vertical and load bearing structure, the beams are placed at intervals of 55 cm. All non load-bearing walls are made of Kerto-T LVL studs, strut and fixed by wood panels on both sides. The interior walls and ceilings can be additionally covered with gypsum boards and being painted.

For our modular design we have chosen a grid of 1,65 m, which leads to a room height of not less than 3,0 meters. A high ceiling, big windows and bright rooms will create a welcoming and pleasant atmosphere and surrounding. On the exterior the grid will also be visible in panels to unify individual structures. The facade panels are made of 8 mm fibre-cement boards which cover the whole facade in squares of 1,65 x 1,65 m. They can be designed in bright colours or a rather natural style. In the areas of windows, the panels are perforated and can be opened by folding them to each side in an aluminum​ railing system.  

We hope that our approach of Tetrotecture on the rooftops of Berlin can help to create new enjoyable spaces for living as well as for other purposes.  


City Above the City architecture competition

Plan B : City Above the City architecture competition 

Metsä Wood challenged architects and students around the world to push the boundaries of modern wood building design in the urban environment. Entrants from 40 countries created their Plan B to urbanisation using wood (Kerto® LVL – laminated veneer lumber) as the main material. The task was to design a wooden extension to an existing urban building. The entries were designed to 69 cities worldwide.

Explore the designs