Seen in courtyards, streets and public places, firewalls emerge and act like a grotesque and disruptive separation of spaces. However, a closer examination reveals they offer various spatial possibilities.
In order to enable a public roof utilization at the Pfefferberg, in Prenzlauer Berg Berlin, such party wall shall be enhanced as a public staircase and space for encounter. As an extended urban space and a place of leisure that allows access to the roof structure of the Blockrand. Thus, the staircase should not only be functional but also an architectural space as a consequence of conditions such as construction, geometry, space, and material.
From the basic form of a narrow band, an edge is formed as a step. Each individual step adds an extra few centimeters of space. Through this ledge large space is achieved while the plates never lose original width. The actual staircase is created by a constant protrude of the individual panels. This results in five different stair modules, which protrude irregularly forward or backward.
Through the displacement of the five individual stair modules, openings are created through which the next compartment can be reached. Each individual module thus brings more space into the resulting positive and negative spaces.