Ventilation in the insulated attic

Hello,

a quick question regarding the attic... in our case, both the ceiling between the upper floor and the attic is insulated and the roof slope is completely insulated up to the ridge.
In the attic is the controlled residential ventilation system, and otherwise, the space is used for storage.

What I am currently wondering is, since there are no windows there, whether the attic space should actually be ventilated as well.

Generally, there are no problems or defects that bother me, what bothers me right now is mainly the dusty, stale air when you stay there (which is logical, where else should fresh air come from).
Does it make sense to integrate the whole area into the controlled residential ventilation, or should it be left as it is?

A specialist told us that the attic must also be ventilated, even if only with a very small air exchange rate, so that mold does not develop.

Hello,

if your roof is actually insulated all the way up to the ridge, you should indeed ventilate regularly to avoid potential mold growth.

We also wanted to have our attic insulated (in addition to the ceiling insulation), but our house manufacturer strongly pointed out that without daily ventilation or integration into the controlled residential ventilation system, the occurrence of mold cannot be ruled out.

Our attic is now insulated only with wood fiber insulation - ventilation is done through ventilation bricks.

Regards,

Dirk

with us, both the ceiling between the upper floor and the attic is insulated as well as the sloping roof completely up to the ridge.

May I ask why someone would do that?

He has already written that... Controlled residential ventilation in the attic.

He already wrote that... Controlled residential ventilation in the attic.

I have read that, but unfortunately still don't understand why the attic is insulated on all sides because of it. Does Controlled residential ventilation here mean that devices and machines for the controlled residential ventilation are placed in the attic? Does this require comprehensive insulation? What kind of machines are those? Where can I learn more about this?