ᐅ Roof window fogs up heavily, and water collects in the edges.
Created on: 22 Oct 2018 11:00
H
hippjoha
Hello everyone,
unfortunately, we are having significant problems with our skylight. It started last winter when the temperatures dropped. Every morning, the window was heavily fogged up (the entire glass was soaking wet).
Since a few days ago (now that it’s getting cold outside again), it has started happening again. After winter, the site manager came by and, of course, said we were not ventilating properly, etc.
The apartment is aired out several times a day...
I’ve attached a few pictures that hopefully illustrate the issue. Could this really be caused by improper ventilation (the humidity in the room is around 50%) or is it more likely caused by a defect in the skylight or its seal?
Thank you very much
unfortunately, we are having significant problems with our skylight. It started last winter when the temperatures dropped. Every morning, the window was heavily fogged up (the entire glass was soaking wet).
Since a few days ago (now that it’s getting cold outside again), it has started happening again. After winter, the site manager came by and, of course, said we were not ventilating properly, etc.
The apartment is aired out several times a day...
I’ve attached a few pictures that hopefully illustrate the issue. Could this really be caused by improper ventilation (the humidity in the room is around 50%) or is it more likely caused by a defect in the skylight or its seal?
Thank you very much
Mottenhausen schrieb:
Jede WetteI would bet against that.
Where condensation occurs, there is no insulation or any kind of vapor barrier; those are located further inside.
Therefore, I would also suspect improper ventilation behavior. What kind of mechanical ventilation does the house have? If none is installed, then the planner is to blame.
Measure the humidity level first.
dertill schrieb:
So if the condensation mainly occurs at this spot and, for example, not on the opposite side, I would first check for drafts here. The condensation appears on both the right and the left side, almost at the same height.
Lumpi_LE schrieb:
I would therefore also suspect incorrect ventilation behavior. What kind of mechanical ventilation does the house have? If none, then you can blame the planner. Hmm, well, we ventilate the entire apartment several times a day, so it really can’t be due to ventilation. Furthermore, in the attic apartment, decentralized ventilation units with heat recovery are installed in the kitchen/living room and the bedroom. The humidity level is around 50%.
I have now conducted a test using an incense stick but couldn’t really detect anything 🙁
However, I couldn’t see the smoke very well, so I’ll have to try again during daylight tomorrow.
Additionally, a colleague lent me a thermal imaging camera attachment for my smartphone, but everything looks fine so far? I think the thermal bridges in the corners are normal, right?
hippjoha schrieb:
Furthermore, a colleague lent me a thermal imaging camera attachment for my smartphone, and it all looks quite okay so far?Unfortunately, he didn’t explain how to use such a camera.
For meaningful images, the shots should be taken shortly before sunrise at temperatures below 5°C (41°F), preferably below 0°C (32°F) – both from the outside and inside, each time with a temperature color scale. However, many of these attachment devices cannot do that.
M
Mottenhausen25 Oct 2018 10:15The window is sealed and functioning properly. As I have stated from the beginning: the connection between the window and the roof does not work as it should because it was botched. What further insights are thermal imaging scans supposed to provide? The window is too cold; otherwise, condensation wouldn’t occur there. Why is it too cold? Because there is a thermal bridge in the reveal, and the entire window installation is probably improper.
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