Window in the attic - due to too good insulation in new construction?

Hello,

I am currently in contact with our roofer.
He says that no window is necessary in an insulated but uninhabited attic.
We have no windows in the side gables and with the roofer’s solution, no window in the roof either.
We have no chimney that might require an emergency exit window.
The roof is insulated with 80mm wooden panels and on the inside with wool and foil.
A photovoltaic system will be installed on the roof.

The rest of the insulation in the house is to Kfw 40 standard. The living areas will be ventilated with a central ventilation system.
I am a little concerned that with this setup the attic might be a bit too airtight and that mold or other problems could occur?

I understand that I will not use the roof window for daily ventilation, since I would have to fold down the stairs to the attic each time and also remember the window. Nevertheless, I do not feel comfortable not having a window in the attic.

What do you think?

Include the attic in the ventilation concept, then you don’t need to worry about anything else.

Good suggestion, which I have also already thought of. I will see if something can still be done there. My "problem" is that we already have the ceiling on the ground floor and the ventilation pipes are already installed. Maybe something can still be expanded there. Originally, the attic was not planned for that.

I don't air out up there very often either. But it is bright with a window. And when I look out up there, I can see the whole Kiel Bay and see container ships on the horizon and the windmills in Denmark, which was and is already worth 800,- bucks to me..