If cable bundles pass though interior walls, middle purlins or joists and thus penetrate the airtight layer twice, the cables need to be stuck in an airtight manner on both sides. An alternate solution is to create a cable tunnel using prefabricated shaped elements or a box made from airtight wood-based panels. The amount of work involved in this case is significantly lower and the end result is better.
This series of articles summarises typical, challenging joint situations and shows how technicians can find practical solutions for these challenges. It also provides an overview of the detail features for which prefabricated solutions are available that allow tradespeople to achieve airtightness in a quick, easy and reliable manner.
This Series was wirtten by Jens Lüder Herms and Holger Merkel
Holger Merkel, provider of blower door measurement services, speaker at the pro clima Knowledge Lab and instructor for certification courses.. He has documented examples of leaks in his most recent project www.zieht-wie-hechtsupp.de. He also publishes specialist articles on issues such as blower door tests on www.airtight-junkies.de.