Practices

QUALICHeCK FACT SHEET #08: Quality control of Stuttgart’s retrofit standard realised by the City’s Energy Consultancy Office

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The City of Stuttgart's Retrofit Standard comprises various steps to achieve the energy-efficient retrofit of both residential and non-residential buildings. This includes the construction supervision, for which the City's Energy Consultancy Office (EBZ) provides qualified experts. In this process, mainly the interfaces between the different trades/works are checked and documented. Moreover, EBZ-trained craftsmen are introduced who are able to install state-of-the-art energy saving measures according to the respective manufacturers' instructions to ensure high quality of implementation and durable buildings.

 

This QUALICHeCK fact sheet evaluates the overall approach of both the Stuttgart Retrofit Standard and the EBZ, including all services. The assessment, based on a comparison of the actors involved, provided the following pros and cons:

 

Pros

 

  • Cost savings due to reduced energy consumption
  • The energy standard will definitely be achieved and documented ('Performance warranty')
  • Longer lifetime of the building
  • Improved quality of execution and thus less expensive maintenance in the long run
  • Becoming eligible for KfW-funding by providing appropriate certification
  • Additional, enhanced architectural value of the building
  • The resale value of the property increases
  • Cost-free training by EBZ
  • Trade-spanning exchange/ discussion via interfaces
  • Possible follow-up work/ complications or disputes (and thus costs) can be prevented
  • Satisfied builders
  • Possible recommendations by clients, hence
  • Ensuring the institution's continued existence
  • Quality in the building sector is enhanced
  • Reduced energy consumption
  • Increasing requirements regarding politics and energy can be achieved
  • The city scape is improved
  • The economy is boosted

 

Cons

 

  • Planning the costs for an energy expert
  • Additional time needed for fixing appointments/ arrangements with the experts
  • Possibly more time required for installation due to higher requirements
  • Possibly more organisational efforts needed

 

 

To download the fact sheet, please visit the relevant QUALICHeCK webpage.