Register for our webinar! Airtightness in Practice: Long-Term Performance, Field Evidence, and Innovative Detection Methods [17 March 2026, 10:00-11:30 CET]

This webinar follows up on contributions presented at the Buildair 2025 Symposium in Hannover and brings these insights to a wider international audience.

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.

The 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. The session will conclude with a presentation of the activities of FLiB, the German association dedicated to airtightness in construction.

This webinar is organized by the AIVC, e.u.[z.] (Energie- und Umweltzentrum am Deister GmbH) and TightVent Europe. The event is facilitated by INIVE.

Agenda (CET)

10:00 | Welcome from Energie- und Umweltzentrum, Wilfried Walther (e.u.[z.], DE)
10:05 | Passive house measurement after 16 years – is airtightness of the envelope still intact? Lars Due (Isolink, Slagelse, DK)
10:20 | Questions and answers
10:25 | Airtightness of multifamily buildings in Czech Republic – theory versus reality, Jiri Novak (Czech Technical University in Prague, CZ)
10:40 | Questions and answers
10:45 | Acoustic Leak Detection in Building Envelopes – Laboratory and Field Tests, Markus Diel (Deutsches Zentrum für Luft- und Raumfahrt e.V., DE)
11:00 | Questions and answers
11:05 | Presentation of FLiB (Fachverband Luftdichtheit im Bauwesen e.V.), Oliver Solcher (Fachverband Luftdichtheit im Bauwesen, DE)
11:10 | Questions and answers
11:30 | End of webinar

Attendance is free of charge, but advance registration is required.