Continuation of Part 4: The challenge: pipe feed-throughs
The position of the airtight layer must be defined

Plastic windows are commonly used in practice on our building sites, but are often associated with a lot of leaks. This is why providers of blower door measurements like to test the joints around these windows. The reason for this is that air can flow freely in the surrounding window profile. The installation guidelines of the RAL quality seal for windows and doors specifies the closing of surrounding window profiles with a special profile – but this is rarely done in everyday practice. However, these air flows can be interrupted by using some joint adhesive.
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.
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