ᐅ Windows are becoming damp on the inside—what can be done? Older building (built around 2000)
Created on: 3 Mar 2025 11:57
R
roadrunner88
Hello,
we have purchased a house built in 2000, energy certificate class C, constructed with Ytong masonry, and double-glazed windows.
Our problem:
The windows in the kitchen (external corner wall) always get damp in winter (condensation collects on the edges).
However, this only happens in the kitchen; the living room, children’s room, bedroom, and other rooms remain more or less dry.
Of course, I understand that this is caused by the temperature difference between the window glass and the indoor humidity.
But what can be done about it, apart from ventilating properly and heating well (which is not exactly ideal for the heating bill in freezing temperatures)?
We have considered installing triple glazing, at least in the kitchen... but then the question arises whether this might lead to mold growth on the wall with the existing masonry?
Are there any experts here who can help us with:
- From which U-value of the exterior wall is it safe to install triple glazing (meaning, when the temperature difference between the wall and the window on the inside is roughly equal)?
- Why does condensation occur in the kitchen, but not on the other windows in rooms with external walls?
- Could the windows be defective?
- Is it advisable to install triple glazing only in certain rooms?
- When installing triple glazing, is it necessary to integrate ventilation for moisture into the wall?
- Do you have any other suggestions?
Thank you!
we have purchased a house built in 2000, energy certificate class C, constructed with Ytong masonry, and double-glazed windows.
Our problem:
The windows in the kitchen (external corner wall) always get damp in winter (condensation collects on the edges).
However, this only happens in the kitchen; the living room, children’s room, bedroom, and other rooms remain more or less dry.
Of course, I understand that this is caused by the temperature difference between the window glass and the indoor humidity.
But what can be done about it, apart from ventilating properly and heating well (which is not exactly ideal for the heating bill in freezing temperatures)?
We have considered installing triple glazing, at least in the kitchen... but then the question arises whether this might lead to mold growth on the wall with the existing masonry?
Are there any experts here who can help us with:
- From which U-value of the exterior wall is it safe to install triple glazing (meaning, when the temperature difference between the wall and the window on the inside is roughly equal)?
- Why does condensation occur in the kitchen, but not on the other windows in rooms with external walls?
- Could the windows be defective?
- Is it advisable to install triple glazing only in certain rooms?
- When installing triple glazing, is it necessary to integrate ventilation for moisture into the wall?
- Do you have any other suggestions?
Thank you!
Extractor hood with ducted or recirculating system? With recirculating, more moisture obviously stays in the room.
We have the same issue, but our kitchen door is usually closed (because of the pets). In those few cold months, the only solution is simply to heat more and ventilate.
We have the same issue, but our kitchen door is usually closed (because of the pets). In those few cold months, the only solution is simply to heat more and ventilate.
J
Jesse Custer3 Mar 2025 15:1011ant schrieb:
Apart from the fact that double glazing (which I prefer to call cavity glazing) is by no means inherently outdated, glass units can definitely be replaced individually without having to remove the entire frame. When I think about currently paying 100 euros per month for electricity, the potential savings from this will also reach a break-even point beyond the time when the windows would need to be replaced anyway due to aging...
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