Redevelopment in record time

12.10.2023
Source: Energy & Management Powernews

Precise planning and optimized processes could enable all trades to work simultaneously on one construction site. In Hamburg, this has now been tried out.

"Sanierungssprint" is the name of the principle that construction engineer Roland Meyer has developed. It is to make possible with the help of methods of the time and process optimization and an hourly construction schedule of all trades the simultaneous work on a building site. In a model project initiated by the German enterprise initiative energy efficiency (DENEFF registered association) the principle was tested now successfully.

Thereby a 1963 built semi-detached house in Hamburg Duvenstedt was energetically reorganized within 22 working days on efficiency house standard 70 EE. In the process, those involved installed a heat pump and a PV roof, installed insulation in the roof and facade, and replaced the windows. Beyond that the complete building services were modernized, three new baths were inserted and new dwelling in the attic were created, as it is called a report of the Deneff.

The principle makes possible on the one hand houseowners to be able to plan better and leave the building stress after relatively short time behind itself, summarizes the Deneff the results of the project. On the other hand, the trades involved also benefited, being able to implement more construction sites with the same resources. The fact that all trades are on site at the same time shortens decision-making paths and improves the flow of information. In the planning sector, too, there would be opportunities to increase the depth of added value and speed.

"With the Renovation Sprint, productivity in the trades can be increased enormously. That is to create with the available skilled workers much more and to go with the energetic modernization large steps forward," says Deneff managing director Henning Ellermann. In addition, he says, cost advantages can be achieved as a result. The potential for scaling is there, says civil engineer Roland Meyer: "Single-family and two-family houses built in the 1960s and 70s in particular are often of the same type, i.e. have similar construction features and floor plans. This would allow technical measures and planning to be standardized and scaling to be accelerated.

The project is now to be evaluated and the potential of the concept examined, among other things, in a research project with the University of Stuttgart on behalf of Agora Energiewende.

Author: Katia Meyer-Tien