Purpose of the work
Systematic approach to ensure airtightness during serial refurbishment.
Method of approach
Theoretical analysis of different methods and suggested approaches. Real-life examples.
Content of the contribution
Germany has already garnered some experience with serial refurbishments of its existing building stock. When mounting a heat-insulating building envelope during serial modernization you usually incorporate an airtight barrier as well.
First of all, however, the question arises as to where to install such an airtight barrier during modernization. There are various options: Will the old plaster surface - inside and outside - serve as an airtight layer or is the airtight layer part of the new wall elements (wall components, EIFS / ETICS)? Every option has pros and cons which have to be considered for every building before taking a final decision. If you tend towards using the old facade you will lose out on most of the potential of prefabricated refurbishment systems.
If the airtight barrier is incorporated into the new wall components to be mounted on the old exterior wall, the components have to be specified accordingly and bonded to the wall with an airtight seal. This process requires reliable specifications.
Results and assessment of their significance
This presentation sheds light on the pros and cons of potential solutions, addresses the different connections (eaves, base, windows) and provides suggestions for future developments.
For further information please contact Søren Peper at: soeren.peper@passiv.de