Practicable and passive house capable renovation systems for roof and wall units using high-performance thermal insulation

Status

completed

Abstract

Motivation

Over 800,000 single family homes were constructed during the post-war period. These buildings reach an average annual heating energy consumption of more than 200 kWh/m²a. In the meantime, the trend in renovation is to apply 16 cm and more of heat insulation material to the facade. Current energy prices leave us with no choice. Very many of these buildings exhibit thermal weakspots which, due to space limitations, cannot be eliminated with traditional insulation materials at all or require very high expenditures to do so. Vacuum insulation has developed more and more in recent years into a first-class 'troubleshooter'. Product-specific restrictions (sensitive surface quality, rigid panel dimensions, long lead times, high prices, etc.) were obstacles which spoke against this kind of insulation up to now. With the development of two easy-to-use mounting and handling methods, this process was initially successfully used for a new building (light laboratory project at the Danube University in Krems) in the year 2004. What would therefore be more logical than to completely renovate a house from the 1960s with vacuum insulation?

Goal

The terraced house in Salzburg in the suburb of Aigen was erected in the 1960s by architect and professor Garstenauer. For the past 5 years it has been owned by the Andre Family. This building was brought up to the standard of a low energy house through appropriate insulation on the facade, terrace and on the flat roof as well as through the use of innovative glass elements.

With the help of vacuum insulation and alu-panelled PUR insulation elements this insulation system of only 5 cm thickness replaced the already existing 5 cm thick EPS insulation. Due to the use of vacuum insulation, the optical appearance of the facade was not disturbed (no jutting out between the two house halves).

Results

From all of the applied systems, the 3D roof-system seems to be the best at the moment as far as usage goes, closely followed by mechanical mounting systems. Both systems feature the possibility to achieve a VIP surface which completely covers the whole wall and/or roof without requiring VIP fitting-pieces.

Conclusion

Based upon this exemplary renovation it has been determined that:

the mechanical mounting systems from VIP will first and foremost be used for special applications in the renovation of facades.

the 3D roof-system has once again proven its strengths. Once the relevant construction-approval permits have been obtained, there will be nothing left to stop a very successful breakthrough.

interest in the method has been actively expressed to the authors from parties in Austria, Italy, Switzerland and Germany. Already existing distribution channels and links can hereby be exploited. In such a way it seems certain that this new technology can establish itself on the market within the next 5 years.

Outlook

The next step is to obtain all relevant construction-approval permits for the vacuum insulation. Further, the consumer price should very soon be noticeably lower, particularly as far as standard panel dimensions are concerned.

Project manager

BM Dipl. HTL Ing. Anton Ferle MSc, Gruppe Blitzblau Austria Essl - Ferle OEG

Project partners

• Bauherr
  Familie Annemarie und Marek Andre
  Baumbichlstr. 56, 5026 Salzburg
  Tel.: +43 (662) 634266
• Dach und Wand
  Dagn GesmbH & Co. KG
  Kaltenbach 33, 6345 Kössen
  Tel.: +43 (5375) 6279
• Wandsysteme
  Firmengruppe Synthesa, Fries-Burgholzer, Glemadur
  Dirnbergerstr. 29-31, 4320 Perg
  Tel.: +43 (7262) 560-231
• Sanitär/Solar
  Kuster Harald Sanitär
  Strubergasse 13, 5020 Salzburg
  Tel.: +43 (662) 622077
• Zimmermeister
  Ing. Hutterer Anton Bauunternehmung
  Köstendorfer Str. 8, 5204 Straßwalchen
  Tel.: +43 (6215) 8304-0
• Glasfassade
  Glas & Rahmen Gesellschaft mbH
  Unterberg 77, 5323 Ebenau
  Tel.: +43 (6221) 8348
• Dübel
  EJOT Austria GmbH
  Grazer Vorstadt 146, 8570 Voitsberg
  Tel.: +43 (3142) 27600-19
• VIP
  Vaku-Isotherm GmbH
  Mittweidaer Straße 26, D-09661 Rossau
  Tel.: +49 (3727) 612477
• Profile f. WDVS
  APU AG
  Hr. Müller Stefan
  Tel.: +49 (171) 2059397
• Abdichtungen
  Villas Austria GmbH
  Industriestrasse 18, A-9586 Fürnitz
  Tel.: +43 (4257) 2241-0

Contact address

Gruppe Blitzblau Austria
BM Dipl. HTL Ing. Anton Ferle MSc
Au 17, A-5311 Loibichl am Mondsee
Mobil: +43 (699) 11339140
Tel.: +43 (6232) 6722-0
Fax: +43 (6232) 6722-18
E-Mail: antonferle@blitzblau.at