Build a terraced end house with an additional unit (GÜ) on your own

I regularly catch a cold from air conditioning. Therefore, I am also glad about our gentle cooling via [Erdwärmeheizung]. But under the roof, that might not be enough - could be. In any case, I would say put the thing as far away from the bed as possible.

How is the roof insulated?

240mm insulating fleece

We have over 30 degrees in our current rental apartment in summer - even at night.

But surely not under 24 cm of compressed felt (?)

But surely not under 24 cm of compression felt (?)

The current house is probably uninsulated.

That would probably make quite a big difference, I would only pre-install the air conditioning.

I consider the option for air conditioning to be sensible here. Mineral wool does not provide the best heat protection, the flat dormer gets a lot of sun. Acquaintances have a very similar structure and find it too warm in the summer.

We have 20cm in the attic with a south-facing roof, where it regularly got over 30° during the heat period. With photovoltaics above the tiles, it now stays at around 28 at the peak.
The attic and intermediate ceiling are insulated in our house, the living spaces below remain at a comfortable 25-26°, despite relatively poor heat protection for a new build in the (few) roof slopes. I do not know how the attic is insulated here.

In addition, body heat further heats the room. For us, this is enough to turn the coldest room into the warmest room in the house. Cooling with an air-to-water heat pump is nice but brings relatively little benefit for individual overheated rooms.