Tag Archives: grommet

Intelligent, effective solutions for joints (5/8) – Care required at the corners of plastic windows:

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Continuation of Part 4: The challenge: pipe feed-throughs

The position of the airtight layer must be defined

Leaks at windows. Photo: ‘Zieht wie Hechtsupp’ – the construction portal for leaks, damage to structures and other curiosities.

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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Intelligent, effective solutions for joints (4/8) – The challenge: pipe feed-throughs

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Continuation of Part 3: The challenge: cables passing underneath joists

The number of pipe feed-throughs through airtight layers is increasing continuously. The familiar vent pipe for the sanitary drain pipe is no longer the only candidate by any means! However, installation technicians for domestic hot water heating, photovoltaic systems and ventilation systems often show little consideration for this issue. Damage can be avoided by careful planning and early intervention. A lot of prefabricated solutions are now available that can be implemented quickly and cost-effectively.

  • A typical error when sealing pipe feed-throughs: this adhesive seal is not airtight as creases occurred when applying the tape. These creases are often not noticed and are only shown up by a blower door test.
  • Solution that can be implemented by tradespersons to properly seal pipes: short pieces of tape are applied along the pipe and the sheeting, all around the pipe. This is very time-consuming.

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.

Continue reading →

Intelligent, effective solutions for joints (3/8) – The challenge: cables passing underneath joists

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Continuation of Part 2: The challenge: sealing cable looms

Kabelbaum über Unterzug abdichten
It is recommended to create a cable tunnel in the case of middle purlins or joists where cables come out on the other side.

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.

Continue reading →

Intelligent, effective solutions for joints (2/8) – The challenge: sealing cable looms

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Continuation of Part 1: Typical leaks: cable feed-throughs for electrical installations

Penetration by single cables and pipes is relatively easy to solve. If adhesive tape is being used, the following steps have proven themselves in practice: first stick the adhesive tape to the cable, and then to the airtight membrane so that an L-shaped adhesive bond with both sides is formed. If more conduits or cables penetrate the airtight layer, the work needed to create an adhesive joint using adhesive tape or adhesive from a tube will be more laborious. Another disadvantage is that the adhesive comes apart as soon as you pull on it.

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.

Continue reading →

Intelligent, effective solutions for joints (1/8) – typical leaks: cable feed-throughs for electrical installations

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Properly installed air sealing is the basis for energy-efficient buildings that are protected against damage to structures. In addition, planners and tradespeople are liable for any damage that may occur later in the case of flawed planning and installation. Blower door tests during the construction phase and after completion show whether the values demanded by regulations and standards (German Energy Saving Ordinance, DIN standards) are achieved in practice. These tests also show where leaks are present in the building envelope.

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.

Continue reading →