High-quality refurbishment - Designing quality standards for the refurbishment of municipal buildings

Status

completed

Summary

The high energetic quality in the building sector in Salzburg is marked by the additional points system of the building furtherance. But there is no similar effort of the energetic ecological measures in the rebuilding sector of communal buildings accountable.

Because of that, the target of the present project is the support of the communal sector to a broad success in the ecological recovering standards.

A short term evaluation of the medium term sanitary potential at Salzburg showed, that within the next few years especially school buildings of the 60's and 70's have to be restructured. A selection of eight communal building objects of different usage has been tested comprehensively and building-ecological evaluated. With the help of these values, different renovation options have been tested for their overall ecological valuation and cost-efficiency.

The results show, that overall reconstruction has to be preferred to single reconstruction measures because of more reasons. Only with an extensive approach of a building, the ecological points can be increased to an acceptable range. Only a modern building standard after the reconstruction offers an approximately comparable alternative to a new building. On the other hand, with an extensive overall approach of a building, there are synergies arising that can be used. For example high damming power makes the installation of a heat-system at the outside of the facade possible - without disturbing the school-operations. Above that it has been shown, that with a simple contemplation of the cost efficiency the all embracing solutions are mostly more costefficient than redevelopment of smaller scale. It is useful to give formulated minimum standards for the main criteria. The standards concern mainly the thermal quality of the building hull, the choice of the heating system, the building material evaluation and the ventilation installation. The minor standards should be already at the contract award process given as obligate standards that have to be sticked to.

With the help of computer-programs there can be plotted variation comparisons and optimisations. This method is a great help for working group discussions or township committees.

The connection of planning and building quantities with perennial building support tasks (industrial management, service, maintenance) makes the contraction of guarantees for energy-consumption limits and energy cost limits possible. So the possibility of saving energy costs opens, which can be an essential financial help for the implementation of an entire concept.

With the communities view, but also with the view of the furtherance hosts, cost efficiency is desirable, because of the efficient use of available means. But the desire to efficient and extensive renovation is often hard to fulfil because the available means are often limited. Because of that reason, implementation models are demanded, that guarantee an implementation of cumulative solutions. With a corresponding design of the furtherance criteria there can be made incentives for step-by-step extensive sanitation. The strong connection of the quality criteria to the minor standards with the criteria for the allocation of furtherance means has been aspired.

At buildings with a high saving-potential (for example school buildings of the 60's and 70's), implementation models with contracting approaches could be successful.

Project management

Helmut Strasser
SIR - Salzburger Institut für Raumordnung und Wohnen

Project or cooperation partner

• Erich Six, Eduard Boehm
  EnergieOptimierung
• Ing. Heinrich Ruhs
  RFG Engineering GmbH

Contact

SIR - Salzburger Institut für Raumordnung und Wohnen
Dipl.-Ing. Helmut Strasser
Alpenstraße 47, 5020 Salzburg
Tel.: +43 662 62 34 55
Fax: +43 662 62 99 15
E-Mail: helmut.strasser@salzburg.gv.at