ᐅ Issue: Daily Condensation Inside the Window Frame

Hello!

In both bathroom windows, as well as in the (identical) window of the separate toilet, condensation forms almost daily during winter. As a non-expert, I’m not quite sure why this happens or if there is anything I can do about it. Especially in the toilet room, where there is no significant humidity, I don’t understand where the moisture is coming from at all. At least in there, this shouldn’t really be happening, right?

Thanks for any help, advice, or sympathy 😉

Thomas

Check the pressure of the window by taking a sheet of paper, closing the window, and seeing if the paper is held firmly.
If not, increase the pressure by turning the mushroom cams on the frame. These are mounted eccentrically, so you will need to test which direction to turn yourself.

Here are my thoughts:

- The open window is fogged up, which clearly means there is humidity in the rooms.
- In both types of rooms (bathroom / toilet), there is always exposed water, so this is completely normal.
- In our guest toilet, the glass also fogs up when I visit in the morning. If you put a person in a small room and let them breathe there, it naturally creates a lot of humidity — this is also normal.

However, the sheer amount of condensation on your seals surprises me... okay, contrary to your personal assessment, these rooms always have higher humidity than the rest of the house, but still...

Maybe try ventilating a bit more?

I have moisture meters in both rooms. These usually show a maximum of 60-65%, rarely 70%, except of course after showering or during prolonged rain outside. It shouldn’t be significantly higher than that.

At the other windows in the house (though they are different models/years), the moisture appears on the inside of the glass. So far, I haven’t found a single drop inside the frames there. That’s why I find this quite surprising...

I will try TomTom’s suggestion today.

Blinker schrieb:

They are usually at a maximum of 60-65%, rarely 70%, except of course after showering or when it has been raining outside for a long time. So it shouldn’t be completely above that.

Currently, it should be a maximum of 50% in this weather (preferably around 40%). So yes, it is definitely too high.

I assume a room temperature of around 20°C (68°F). In winter, 65% humidity is usually achieved only with a humidifier running continuously. Others have to place damp towels on all radiators and change them every half hour. So, it is clearly not ventilated enough. That doesn’t mean, however, that the windows cannot still be adjusted better.