ᐅ Is humidity in new buildings a health risk?

My home office was relocated to a newly built house that has been constructed over the past few months and apparently is still not dried out at all. There is underfloor heating installed. When I enter the room on Monday mornings, the humidity level is over 90%. I then open the windows and doors for 10 minutes. I can’t keep them open longer because it simply gets too cold for me. Opening the windows on tilt doesn’t help. Should I be concerned about my health with such high humidity?

If you don’t have rheumatism and the temperature is warm enough, probably not. I would be more concerned about the condition of my paper documents and electronic devices...

At 90% (and with a slight thermal bridge), there is a significantly increased risk of mold growth.

Talk to your supervisor or the works council (if available) and suggest installing a construction ventilator (make sure to keep the noise level low). Ideally, it should be connected to the sewage system, which makes it practically maintenance-free. After a few weeks, the issue should resolve itself.

Are you measuring the humidity, or is it just simply over 90%?

What does the manager say about it?

We set up a hygrometer. Monday mornings are particularly extreme; over 90%. After airing out the room by opening windows fully for 15 minutes, it naturally improves. We do this three times throughout the morning. That’s why we obviously wear sweaters and scarves.

Yes, somehow it becomes unbelievable. 90% humidity...