Airtightness of the building envelope is essential for energy efficiency, thermal comfort, moisture safety, and indoor air quality. Although increasingly required by building regulations worldwide, questions remain about long-term durability, the gap between targets and real performance, and reliable leak detection methods. 

This webinar will present rare field data from a passive house after 16 years of operation, highlighting the long-term integrity of airtight envelopes. Experience from multifamily buildings in the Czech Republic will illustrate the differences between expected and measured airtightness levels in practice. In addition, innovative acoustic leak detection methods, tested both in laboratories and in the field, will be introduced. 

Agenda:

• 10:00 | Welcome from Energie- und Umweltzentrum

  Wilfried Walther - e.u.[z.], Germany

• 10:05 | Passive house measurement after 16 years – is the airtightness of the envelope still intact? 

  Lars Due - Isolink, Slagelse, Denmark

• 10:20 | Q&A 10:25 | Airtightness of multifamily buildings in the Czech Republic – theory versus reality

  Jiri Novak - Czech Technical University in Prague, Czech Republic

• 10:40 | Q&A 10:45 | Acoustic Leak Detection in Building Envelopes – Laboratory and Field Tests

  Markus Diel - Deutsches Zentrum für Luft- und Raumfahrt e.V., Germany

• 11:00 | Q&A 11:05 | Updates on Building Airtightness in Germany

  Oliver Solcher - Fachverband Luftdichtheit im Bauwesen, Germany

• 11:10 | Q&A
• 11:30 | End of webinar