ᐅ The roof window experiences heavy condensation, with a significant amount of moisture forming in the morning.

Created on: 24 Nov 2020 19:12
H
HabneFrage
In an older attic apartment, there is always the problem in winter that the skylight window sweats heavily overnight.
In the morning, the glass and frame are very wet.
This probably happens because the glass is cold while the room temperature is higher.
Room temperature is about 18°C (64°F).
The skylight window is additionally covered from the inside by a blackout roller blind. There is about 25 cm (10 inches) of air between the blind and the glass.
The room itself is small, about 6 m² (65 square feet).

Does the window sweat so much overnight because the blind separates the skylight glass from the room air?

Using blackout is necessary because otherwise, it would be too bright (street lighting).

Thank you very much.
Nida35a24 Nov 2020 19:38
We can keep the tilt position down to -15°C (5°F) when the heating is off.
H
HabneFrage
24 Nov 2020 19:44
Nida35a schrieb:

Tilt windows withstand temperatures down to -15°C (5°F) with the heating turned off.

No thanks. That cannot be a solution.
KingJulien24 Nov 2020 19:45
The window is simply too poorly insulated and therefore too cold on the inside.

Either replace the window or wipe it with a towel in the morning.
We currently live in the attic and do this every morning; it’s not much effort.
seat8824 Nov 2020 19:57
HabneFrage schrieb:

No thanks. That cannot be a solution.

Don’t you have anything to cover it with?
Mycraft24 Nov 2020 20:35
Tilt or fully open windows, etc., would not be a solution for me either. People are different.

Ventilation is the simplest approach. It is sufficient to at least keep the air moving in the room so that the moisture can escape.
lastdrop25 Nov 2020 11:51
Heating more. A room temperature of 18°C (64°F) and frozen seals say it all...

And then ventilate as much as possible.