P019

Renovation of the building envelope Stapferstrasse, Brugg

One of our early projects, which we like to present, demonstrates the technical aspects of our work.

The family home was renovated and extended in 2007. The facade soon started showing moisture damage under both the terrace cladding (above right) and the large fixed glazing (left). The building specialist consulted by the architect suspected rising damp in the masonry. In addition, the temperatures in the attic were very high in summer.

In 2014 we were appointed as consultants by the client and we quickly determined the causes of the water damage.

The damage under the terrace cladding could be traced back to two faults: The side flashings had not been properly drained, and the metal cladding had been attached to the top of the wall through the underlying waterproof membrane, with water penetrating the masonry.

Left: The window remains in place and a windowsill reaching behind the window catches the penetrating water. Right: An external sun shade is also installed.

The damage under the window was also the result of two construction errors:

The drainage slits of the window frames were not at the lowest point causing water to accumulate in the frame. In addition, the putty joints against the brickwork were too narrow and cracked quickly as a result. Due to the absence of a windowsill, water eventually starting seeping into the masonry.

On behalf of the clients we oversaw the analysis of the damages, we achieved an out-of-court settlement, and we developed and implemented the remedial work together with the original architects.

Client
Private

Services Baumgartner + Partner
Client consulting, tender planning
Project management, construction management: pbbr GmbH, Thalwil

Planning Team
Facade engineer: Feroplan AG, Chur
Building physics: Amstein + Walterth AG, Zurich

Colaboration
Philippe Baumgartner, Thomas Baumgartner Gsell

Realization: 2014
Creation costs: CHF 150T