Hello everyone,
I urgently need some advice.
We have a house that we bought in 2019 and partially renovated. All the windows are new with double glazing, and we installed underfloor heating.
In recent years, we have already experienced high indoor humidity levels, up to about 65% in winter.
This year, we even had high humidity of 55-65% in all rooms during the summer, and ventilating did not help. Now, in autumn, the humidity is rising above 70%, and we are gradually becoming unsure of what to do.
I measured the walls in all rooms with a moisture meter. The north-facing wall shows about 16% moisture in the corners. The interior walls have about 12%. However, there are no walls that are visibly wet. The roof and walls are also tight.
We regularly air the rooms by cross-ventilation, morning and evening, and now have a dehumidifier running in the bedroom. Still, mold is beginning to grow.
The north basement wall is also damp, but there is roofing felt between the stones, so I don’t think the moisture is rising from below.
Additionally, last year I insulated the basement corner with EPS insulation boards.
I believe I have covered all relevant details.
Does anyone have any idea what I might be doing wrong or where I should look next?
Best regards,
andre007
I urgently need some advice.
We have a house that we bought in 2019 and partially renovated. All the windows are new with double glazing, and we installed underfloor heating.
In recent years, we have already experienced high indoor humidity levels, up to about 65% in winter.
This year, we even had high humidity of 55-65% in all rooms during the summer, and ventilating did not help. Now, in autumn, the humidity is rising above 70%, and we are gradually becoming unsure of what to do.
I measured the walls in all rooms with a moisture meter. The north-facing wall shows about 16% moisture in the corners. The interior walls have about 12%. However, there are no walls that are visibly wet. The roof and walls are also tight.
We regularly air the rooms by cross-ventilation, morning and evening, and now have a dehumidifier running in the bedroom. Still, mold is beginning to grow.
The north basement wall is also damp, but there is roofing felt between the stones, so I don’t think the moisture is rising from below.
Additionally, last year I insulated the basement corner with EPS insulation boards.
I believe I have covered all relevant details.
Does anyone have any idea what I might be doing wrong or where I should look next?
Best regards,
andre007
ypg schrieb:
Do you have radiators? Are they throttled back or is it warm? Are they on constantly or do you limit the heating?We have underfloor heating. We heat all rooms to 20 degrees Celsius (68°F). We have thermostats in every room that control it.
andre007 schrieb:
Hello everyone,
I urgently need some advice.
We have a house that we bought in 2019 and partially renovated. All the windows have been replaced with double glazing, and underfloor heating was installed.
In recent years, we’ve already experienced high humidity levels, up to about 65% in winter.
This year, we had high humidity of 55-65% in all rooms during summer, and ventilation didn’t help. Now in autumn, the humidity is rising above 70%, and we are getting quite confused.
I measured the walls in every room with a moisture meter. The north-facing wall is about 16% damp in the corners. The interior walls are around 12%. However, no walls are truly wet. The roof and walls are also watertight.
We regularly ventilate by fully opening windows in the mornings and evenings, and we now have a dehumidifier in the bedroom. Still, the mold has started to grow.
The north basement wall is also damp, but there is roofing felt between the stones, so I don’t think the moisture is rising from below.
Also, last year I insulated the basement corner with EPS foam.
I believe I have covered everything.
Does anyone have an idea what I might be doing wrong or where I should look?
Best regards,
Andre Where exactly are the mold spots appearing? On the north wall? Is it in the bedroom? Do you keep the heating on continuously there? Are the room doors often left open?
After renovating an older home (double-glazed windows, new radiators), we had the same problem, but in the living room (mold on the west wall). Adding thermal insulation solved the issue.
ypg schrieb:
Did you also renovate the walls?
The information is a bit slow coming on such a compact topic. Hi, the walls were not renovated. Everything that was renovated, I listed in the summary. We're currently considering blown-in insulation between the masonry and the brick facade, but I'm a bit uncertain about it.
Tigerlily schrieb:
Where exactly do the mold spots appear? On the north-facing wall? Is it in the bedroom? Do you keep the heating on continuously? Are the room doors often open?
After renovating our old building (double-glazed windows, new radiators), we had the same problem, but in the living room (mold on the west wall). Insulation solved the issue.The spots are all on the north-facing walls or in the corners. These are the living room, office, and bedroom. The heating is on continuously (except in summer). We maintain a room temperature of 20°C (68°F).
The doors are basically always open.
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