Yep, we are still working on it. First, we really insulated everything with sealing tape, including the water meter and a few other spots. Then we found that the wall where the pipes are located is damp in the lower area, which is why we removed two boards from the floor. The insulation underneath was also damp. The current "solution" is that we removed the outermost row of paving stones on the outside of the wall because it was noticeable that the base there had absorbed some water. In the next few weeks, this part will be covered by the carport anyway, and fortunately, the rest of the base around the house is still accessible to take a closer look and make improvements. For 1 week now, the utility room has also been heated, the fireplace is running, and airing out is also going better right now since the weather has not been so humid lately. The condensation problem has therefore been somewhat resolved for now by heating and subsequently insulating the affected pipes; the rest of the house wall problem has become known as a result and is now being addressed. We had three hygrometers set up; each showed something different, even though they were from the same company :eek:. We then decided on the better value in each case. I also don't quite understand why the controlled ventilation system can’t remove more moisture; maybe it has something to do with the enthalpy exchanger, but honestly, I haven’t felt like dealing with it recently, and the heating engineer knew less about it except for the groundbreaking tip to run the system on automatic if possible. Compared to the last few weeks, we are currently enjoying living here and are happy about what is finished. The moisture issue is now recognized and seems at least fixed or fixable.