Building extension
What does building extension entail?
Building height extension refers to increasing the loads on individual elements of the load-bearing structure of an existing building. This leads to an increase in foundation pressure and, consequently, to greater settlement.
In this context, account must be taken of the suitability for use (crack-free condition) and the resistance to hydraulic failure (stability) of a structure. In other respects, either a modification to the foundation geometry (deepening or widening) or ground stabilisation (URETEK method), or a combination of both, is necessary.
Why is building height extension a topical issue?
Adding storeys to existing buildings can provide additional homes in times of a housing shortage – particularly of affordable housing. The “Germany Study 2015 – Housing Potential”, conducted by TU Darmstadt and the ISP Pestel Institut für Systemforschung Hannover, had already established that adding storeys offers enormous potential for additional living space. Particularly in urban areas, where building land is scarce and green spaces such as gardens and parks must be preserved, the only option left is to build upwards. The advantages of adding storeys lie particularly in the fact that no new land is required – meaning no associated costs – existing infrastructure and traffic areas can be utilised, and energy-optimised extensions can even improve the energy efficiency of the entire building.