Condensation water in the shell construction in the area of the ring beam

Hello everyone, I already asked this question in another forum, but unfortunately have not received an answer yet. Maybe someone here knows more?!

Three weeks ago, the interior plaster (lime plaster) was applied, and in two weeks the screed is supposed to come. Currently, we always have about 80-90% humidity on the construction site with an indoor temperature of about 5-10 degrees. Drying units and heating will start as soon as the screed is ready.

What worries me a bit, however, is that the walls in the area of the ring beam are extremely wet (you can clearly see the area from the inside). Is that normal? The ring beam is insulated with 100mm on the outside and 20mm on the inside (see picture). The U-value of the ring beam is worse than that of the bricks. Could that possibly be the problem, or do we have another issue here?

Thank you very much!

Best regards, Hannes

Good morning,

This is completely normal and has the following background:
The plaster has a very high water content, which it still needs to lose during setting. In the areas you have built, the water can escape towards the room side and towards the wall side, as the Poroton block can absorb a certain amount of water and conduct it outward. The same would be true, for example, with sand-lime brick and even more so with aerated concrete blocks.
Your ring beam is concreted, and concrete has the property of being significantly denser with respect to water absorption than the other materials. Therefore, the water can only dry out on the room side, and the plaster remains noticeably wetter. This often leads to water visibly settling on the surface.

The currently prevailing climatic conditions are also really unfavorable for drying, as we generally have high humidity and the air can take up little water due to the cold temperature.
This, at first, therefore has nothing to do with a dew point undershoot, which would then lead to condensation.

I hope I could help.

Best regards, Jann

Good morning ,

thank you for your reply! That reassures me!

Regards Johannes