Humidity 60% Masonry damp

Hello, we are now living in the house for the first winter.
The humidity 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 that damp?
It's a brick house without ventilation.

Regards, Patrick

Do you really have to be told now to ventilate by shock several times a day so that your brand-new place doesn't get moldy? Or do you figure that out yourself? 60% is too high with the current outside humidity and indicates too little ventilation.

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

And with 80% outside humidity, it doesn't really go down either.

Okay, I probably should have added, despite ventilating.. sorry, my mistake

Ventilate or mold, your choice. You managed to build a house, so you can definitely handle sufficient ventilation. And educate yourself about the absolute water vapor content of the air at low temperatures. Or get a dew point calculator app. For comparison: Here is the first winter in the massive new build which, due to the short construction time, has VERY much residual moisture. I turned the ventilation down one notch today so that the indoor humidity does not drop below 40%. The air outside is quite dry at the moment.

The air outside is quite dry at the moment.

That is not true, iOS says 83% and Netatmo is currently at 80%, so nothing with quite dry! The OP also writes 80%. But in my opinion Ötzi is right!

That is not true, iOS says 83% and Netatmo is currently at 80%, so no dry at all! The OP also writes 80%.

Yes, it is! It has to do with the vapor pressure curve of water in air. Right now, the outside temperature here is 2.9°C with 82% RELATIVE humidity. This corresponds to a dew point of 0.2°C or an absolute water vapor content of 4.9g/m3. If you warm this outside air up to 22°C room temperature and keep the water vapor content the same, you have an indoor RELATIVE humidity of just 25% (!!). That is why building drying in winter works much better than in summer, provided you ventilate sufficiently and heat properly. The original poster does not ventilate enough and will probably soon be surprised by the consequences.