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A conference of the
Energie- und Umweltzentrum
am Deister GmbH


11th International BUILDAIR Symposium

This was the

11th International BUILDAIR Symposium

on the 24th and 25th of May 2019 in Hannover:

175 professional colleagues from Germany, Belgium (7), Denmark (3), France (2), Ireland (2), Luxembourg (1), the Netherlands (4), Norway (3), Austria (2), Switzerland (6 ), Spain (1), the Czech Republic (2) and the USA (2) followed attentively the exciting lectures and discussed their practical experiences with the introduction of EN ISO 9972 and the national annexes, the assessment of leakages, the measurement accuracy of differential pressure measuring methods and the challenges of special measuring methods such as testing very dense buildings or under protective pressure. Also requirements for ventilation systems, applications of building thermography and legal issues were among the topics.

All lectures were translated as usual simultaneously.

The 12th International BUILDAIR Symposium will take place in the spring of 2021. We look forward to welcoming you and your colleagues and business partners!

Thanks a lot to the sponsors

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and to the cooperation partners

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and to the media partners of the symposium

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Session 1: Reports from associations – standards and regulations – national annexes of ISO 9972

Information from the German Association for Airtightness in the Building Industry (FLiB e.V.)
Oliver Solcher, D

Information from the Thermography and Blower Door Association Switzerland
Michael Wehrli, CH

Reports from various countries on the status of the national annexes of ISO 9972
Austria - Michael Pils
Czech Republic - Jiří Novák
Denmark - Lars Due,
France - Fabrice Richieri
Ireland - Mark A. Shirley
Spain - Irene Poza Casado
Switzerland - Gregor Notter

German national annex to DIN EN ISO 9972
Joachim Zeller, D

Introduction and survey on "Preventability of leakages"
Klaus Vogel, D

90 seconds - Exhibitors have the floor

Session 2: Measurement in practice

Measurement of airtightness in high-rise structures
Søren Peper, D

Report on air permeability measurements in consumer markets and office blocks in actual practice
Torsten Bolender, D

Measurement at multi-family dwellings – spot-check measurements and internal leakages
Andreas Kaschuba-Holtgrave and Angela Rohr, D

The challenge of measuring highly leaktight buildings and apartments
Stefanie Rolfsmeier, D

Assessment of durability of airtightness in passive houses by means of repeated testing
Jiří Novák, CZ

Airtight interface connections in the elements
Helmut Schuler, D

Thermography: Heat transmission resistance and infrared transmissible membrane – underestimated influencing factors 
Benjamin Standecker, D

Session 3: Ventilation

Feedback on a full ventilation system reconditioning in a non-standard sealed building
Fabrice Richieri, F

Airtightness - ventilation concept and window ventilation
Oliver Solcher, D

The most frequent planning and installation errors in ventilation systems – report on actual practice
Theo Reuter, D

Session 4: Sealing and bonding

Adhesives are finally regulated: DIN 4108-11
Stefan Hückstedt, D

Special features of air sealing in historical timber constructions
Thomas Runzheimer, D

Measurement of components permeability in-situ
Martin Prignon, B

Session 5: Leakages in the building envelope

When airtightness alone is not enough: Structural damage due to flank convection
Michael Wehrli, CH

Airflow through lightweight wall assemblies
Hartwig Künzel, D

Claims for rectification? –
Moisture-resistant and moisture-sensitive structures
Wilfried Walther, D

Technical requirement level for the preventability of leakages
Klaus Vogel, D

The dispute over the airtightness of the building envelope under the terms of the contract for work and services – appraisal in spring 2019
Ulf Köpcke, D


Accompanying the International BUILDAIR Symposium a trade exhibition took place, this time involving twelve companies. The participants of the Symposium are very excited about the opportunity to find out about proven and new products and services in the lecture breaks. If you would like to pre-book for the exhibition for the International BUILDAIR Symposium 2021, please contact

Margareta Hollmann (Monday to Thursday 10 am to 4 pm):
phone: + 49 5044 975-22 
e-mail:   hollmann(at)e-u-z.de

We would like to thank all exhibitors of the 11th International BUILDAIR Symposium for enriching the event with the presentation of their portfolio.


Thank you very much for your coming and for the interesting discussions! We hope you have been able to take home some new insights and findings. We wish you a successful time with many exciting projects - and we look forward to welcoming you again at the 12th International BUILDAIR Symposium in spring 2021.

Do you have a question or suggestion for the next International BUILDAIR Symposium in Spring 2021? Please, feel free to contact the

Conference secretariat

Energie- und Umweltzentrum am Deister GmbH
Zum Energie- und Umweltzentrum 1
31832 Springe, Germany
Tel. +49 5044 975-20
Fax +49 5044 975-66
E-Mail: bildung@e-u-z.de
Kontakt: Sabine Schneider


Many thanks to all speakers - with your interesting and well-prepared contributions, you have contributed significantly to the success of the symposium!


Contact for journalists

Ursula Mellema


Please feel free to download

Order form conference proceedings from previous symposia


Your arrival

Arrival by public transport
From Hanover main station the bus lines 128 and 134 (both direction Peiner Straße) go directly to the HCC.
Alternatively: from the central station take tram line 10 (direction Aegidientorplatz) to Aegidientorplatz, change to tram line 11 (direction zoo), from there directly to the HCC.

Arrival by car
See map, ample parking (entrance to the parking garage in Schackstraße) are available.



Information in accordance with § 5 TMG

Company: Energie-und Umweltzentrum am Deister GmbH
Address of company: Energie- und Umweltzentrum 1
31832 Springe-Eldagsen
Phone: +49 5044 975-0
Fax: +49 5044 975-66
E-Mail: info [at] e-u-z.de
business manager: Uwe Brockmann
Commercial register entry: HRB 102155
registry court Hannover
VAT-Id.-Nr.: DE 196244147
Tax-Nr.: 42/200/03435
Responsible person for the content: Uwe  Brockmann
Dispute resolution: The European Commission provides a platform for online dispute resolution: https://ec.europa.eu/consumers/odr
Our e-mail address isto be found above in the imprint.
We are not willing or obligated to participate in dispute resolution procedures ahead of a consumer arbitration board.
Photos: © Energie- und Umweltzentrum am Deister 


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May 2018 / source: eRecht24

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Responsible in the sense of the European General Data Protection Regulation (Datenschutz-Grundverordnung, DSGVO) and other national data protection laws of the member states as well as other data protection regulations is:

Energie- und Umweltzentrum am Deister GmbH 
Zum Energie- und Umweltzentrum 1 
31832 Springe-Eldagsen 
Telefon: +49 5044 975-0 
info [at] e-u-z.de

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May 2018 / sources: e-recht24.dedatenschutz.org