ᐅ Humidity 60% - Masonry damp

Created on: 21 Nov 2020 16:01
P
Patricck
Hello, we are now experiencing our first winter in the house.
The humidity level is always around 60%, sometimes even higher.
The exterior plaster was completed last week.
Moisture also accumulates on the roof windows.

Could it be that the masonry is still damp?
It’s a brick house without mechanical ventilation.

Regards, Patrick

Grundriss Erdgeschoss: Räume, Türen/Fenster und Messwerte in schwarzen Kästchen.


Grundriss eines Obergeschosses mit grünen Umrandungen; Textfenster zeigen Temperaturen und Zustand.
T
T_im_Norden
21 Nov 2020 16:44
Outdoor air at 5°C (41°F) with 80% relative humidity contains 5.44 g/m³
Indoor air at 20°C (68°F) with 80% relative humidity contains 13.85 g/m³

Conclusion: Ventilation dries the room because more moisture is carried out than comes in.

Ötzi was faster.
Nida35a21 Nov 2020 16:50
Ventilate several times a day (5-10 times), either by shock ventilation or continuous airing.
Get a hygrometer that measures indoor/outdoor temperature and humidity, with ventilation recommendations.
Y
ypg
21 Nov 2020 18:08
Patricck schrieb:

Hm, well, I can’t really open the windows more than every day.

Actually, you have to. That’s just how it is with new constructions. That’s why many recommend a ventilation system for people who work full-time and don’t have the time or energy to ventilate for half an hour in the morning and evening.
I believe the very reason this forum exists is because nowadays you have to actively get the air out of the house—meaning the moisture.
A person loses about 1 liter (1 quart) of water through sweat during the night—that needs to be removed. Plus, there’s kitchen steam on top of that.

Heat – ventilate – heat – ventilate...
Patricck21 Nov 2020 18:19
My question was actually whether it is possible that there is still so much moisture in the building that the air is this humid.

Ventilation or not.
Ötzi Ötztaler
21 Nov 2020 18:28
Yes, there is definitely still over a ton of water inside that will come out over time—if it is allowed to drain.
H
haydee
21 Nov 2020 18:46
Yes, no matter how much construction moisture is present, the solution is to ventilate more.