ᐅ Windows develop condensation on internal seals when it is cold outside.

Created on: 14 Nov 2019 18:29
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Bauernhaus1829
Hello everyone,

I am new here, 30 years old, and have renovated a farmhouse from 1829.

I have the following issue with my double-wing wooden windows:
At around 5°C (41°F) outside temperature and below, some of these windows start to experience condensation at the seals between the sashes as well as between the sash and the frame. Water collects on the seal and then runs down onto the frame.
This phenomenon mostly occurs on the same windows, especially in the bathroom and bedroom. However, the humidity in these rooms remains within normal ranges. The colder the outside temperature, the more water accumulates and the more windows are affected.
Is there a solution to this issue other than removing the water twice a day?

Thank you in advance for any assistance!

Holz-Doppelfenster-Tür mit vier Glasfeldern; zwei weiße Herz-Dekofiguren liegen davor.


Türschwelle mit Holzrahmen links, weißem Türpfosten in der Mitte und Metall-Schiene am Boden.


Nahaufnahme eines Türrahmens: Holz links, Metall-Schlossplatte, Dichtung mit Tropfen
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Bauernhaus1829
16 Nov 2019 08:44
How should one imagine such insulation? Using additional sealing tape?
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Lumpi_LE
16 Nov 2019 08:57
The internal seal is not working; it is physically and logically inevitable that condensation occurs there.
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Snowy36
17 Nov 2019 10:05
You should take a close look at the offer to see exactly what you purchased...

What U-values etc. the windows have... with windows this new, that is definitely not normal.