Moisture on the inside of the wind barrier!

[duell]

We are renovating an old cabin. It is about 20 square meters and currently consists of a "living room" and a bathroom. In the living room, I have added insulation, installed a vapor barrier, and drywalled. In the bathroom, we have leveled the floor with self-leveling compound, but the outer walls still have open insulation. I just removed a fiberglass panel and noticed that it was very damp on the wind barrier, the same on the other two outer walls.

Is this normal because we don't have a vapor/moisture barrier on that part yet?
We also haven't installed any ventilation yet, and I can imagine that the leveling compound has released some moisture. We have around 18 degrees indoors, outside it's 7 degrees and 98% humidity.

 

[Johnsvi]

Probably due to the absence of a moisture barrier, and the fact that you have just self-leveled the floor? There is an incredible amount of moisture in the air when it dries

 

[duell]

It's probably as you say, I panicked a bit when I discovered it but now that I've thought about it, it seems quite likely. I'll bring a humidity meter with me and tonight I'll start a dehumidifier.

 

[RoBo]

Better with an extractor fan than a dehumidifier.

 

[duell]

I was thinking of starting with a dehumidifier, then it will be Fresh Intellivent in the bathroom and an air supply vent in the other room.

 

[Sten Ekström]

We are in the process of renovating an old cottage. It is about 20 square meters and currently consists of a "living room" and a bathroom. In the living room, I have added insulation, put up a vapor barrier, and plastered.
In the bathroom, we have poured self-leveling compound, but the exterior walls are still open insulation for now. I just removed a fiberglass board and saw that it was very damp on the wind barrier, the same on the other two exterior walls.

Is this normal because we don't have a vapor/moisture barrier on that part yet?
We also haven't managed to install any ventilation, and I imagine the self-leveling compound has released some moisture.
We have about 18 degrees inside, outside it's 7 degrees and 98% humidity.

We are in the process of renovating an old cottage. It is about 20 square meters and currently consists of a "living room" and a bathroom. In the living room, I have added insulation, put up a vapor barrier, and plastered.
In the bathroom, we have poured self-leveling compound, but the exterior walls are still open insulation for now. I just removed a fiberglass board and saw that it was very damp on the wind barrier, the same on the other two exterior walls.

Is this normal because we don't have a vapor/moisture barrier on that part yet?
We also haven't managed to install any ventilation, and I imagine the self-leveling compound has released some moisture.
We have about 18 degrees inside, outside it's 7 degrees and 98% humidity.

Completely natural. Humid warm air condenses on cold surfaces. That's why you have a vapor barrier (moisture barrier) on the warm side.
If it's a summer cottage that gets colder indoors than outdoors, you don't have a moisture barrier.
If the insulation has a density of about 700kg per m3, TV expert träspån requires no moisture barrier.
This has worked in old houses before plastic came along. The theory is that the träspån absorbs moisture and releases it in the summer.

 

[duell]

I can imagine it becomes even more when there isn't even plaster to slow down the air.