Attic problem. High humidity - Controlled residential ventilation?

With the window tilted, this should no longer be a problem, especially if you tilt two windows and create a draft. I have also often had the blind halfway down for months. Neither storm nor water gets into the apartment... The blind alone keeps so much water out on the weather side that you have to look for the splashes on the window. You can also close the windows for a day during a storm, which you usually hear about in the weather forecast... I wouldn’t worry about it. All in all, an unfortunate situation as long as no one lives in there but not totally fatal. I would tilt the IDE windows, lower the blind a bit, and just observe the whole thing for a while.

The fundamental error is that it was done half-heartedly. All or nothing. Nothing at all means that it is a real cold floor without any insulation as ours is. It is dry, airy, ice cold, at least for now.

Hello ,

I just happened to come across this thread and would like to ask about the current status of the humidity in your attic. By now, you insulated your cold roof 1-2 years ago (?), so I would like to know more about the "execution."

I assume it is still unheated? How are the temperatures and humidity?

It is unheated but insulated all around. Everything is fine. Dry and reasonably warm in winter, dry and fairly cool in summer.

Good that this topic has come up. I had it done exactly like the OP. So half according to definition. I have never had less than 12°C up there but currently 85% relative humidity.

But something had to be done there as well, since my controlled residential ventilation system is on the roof.

I think I will have the ventilation extract air from up there and supply air through the window rebate.

Since I have heat recovery with enthalpy, supplying air through the controlled residential ventilation will then be nonsense, as I would be blowing warm moist air back in again.

What is not entirely clear to me is why the floor stays dry with insulation and foil. It is sealed as well, isn't it, or did I overlook some ventilation?

I have up there Velux with ventilator setting and also air out frequently. The living area is completely closed off by a terrace door. It is tight.

I have never had less than 12°C up there but currently 85% relative humidity.

I also have "adequately warm" temperatures after the insulation done afterwards, but a relatively high humidity of about 70%. Of course, this is not good in the long term, which is why I asked. I have currently placed a dehumidifier inside and will observe how the moisture develops and how much water is actually being extracted.