**Author details**

*Zero-Energy Buildings - New Approaches and Technologies*

description is the target for the successive retrofit.

is documented as the starting point for roadmap development.

effects and allow for the design of future-proof buildings.

*5.5.3 Situation today*

*5.5.4 Intermediate steps*

performance in 2050.

**6. Conclusion**

total annual carbon-emission of 0 kg. Also, the technical configuration of the building and the boundary conditions for the calculation need to be specified in order to be useful for the building owner. The configuration able to achieve the intended performance can be determined through computational simulation. The technical

Today's state of the building is either in case of building retrofit projects the current condition of a building at the time of assessment or it is the state of a new building at the time of construction in case of a newly built building. This condition

In order to design a "climate-neutral by 2050" building, it is advisable to determine the 2050-configuration first and then to subtract the elements until construction is technically and economically feasible at the current time. The subtraction of elements can be due to financial constraints, or due to technical availability or market maturity or also due to changing demand. Obviously, it is not possible to predict the future precisely, but the road-mapping approach will help to avoid login

The intermediate steps are defined by the current state and the intended state in 2050. In the method introduced earlier, these intermediate steps are determined by subtraction components from the high-performance configuration. In this process, the technical lifespans of the building components and service systems are considered. For example, double-glazed windows installed in 2020 are exchanged for triple-glazed windows at the end of their lifespan in 2040 to achieve the intended

The chapter has introduced the concept of future-proof design and integrated implementation roadmaps towards the step-by-step achievement of zero-carbon performance in 2050. The application of these concepts has been discussed on the level of governance and the level of single building projects as tools for goal setting and strategic development of future-proof building designs. While on building level, components of the building and energy concepts are addressed in a renovation roadmap; on the higher international, national, municipal and building sector layers, support schemes for research, technology development, capacity building and financial support are introduced in an implementation framework towards zero-carbon building performance. Especially for rapid construction activity in developing countries but also the existing building stock in developed countries, the future-proof design approach, supported by tools such as the DGNB framework for climate-neutral building stock or the individual renovation roadmap (iSFP), can be

instrumental in overcoming inherent individual market barriers.

**42**

Dirk Schwede Institute for Building Energetics, Thermotechnology and Energy Storage (IGTE), University of Stuttgart, Stuttgart, Germany

\*Address all correspondence to: dirk.schwede@igte.uni-stuttgart.de

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
