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

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!

How old are the windows? Double-glazed?

The windows are double-glazed and 3 years old. However, the problem has existed from the very beginning. The carpenter who installed the windows unfortunately had no idea why the issue occurs or what could be done to fix it.

Do you measure or monitor your indoor humidity?
We also have wooden windows, and there was just water on them when the humidity was too high.

I monitor the humidity with digital measuring devices. For example, the bathroom currently has 56% humidity, and the window is sweating. In the other rooms, the humidity is somewhat lower (46-53%). So far, there is nothing visible there, but I had to dry some windows yesterday/today/the day before... tomorrow as well.

So, there really shouldn’t be any issues, but after 3 years you have very little chance to make a claim.