Recessed pot for spotlights in ceilings with insulation

Small tip...Google image search: Einbauspots Abstandhalter

Very good tip. The question is how the insurance views something like this if something happens. Now I am really scared with the statements above.

I have to do it from below and with the trim it looks terrible

You can safely leave out the trim. As I wrote, just fill it and that's it... this is done daily on thousands of construction sites. They can't all be wrong.

Yes, that would be great if it were that simple. This is a prefab house and I have to check if the walls are not already finished on the inside from the factory.

There are plasterboards for the Thermo-X cans that you screw in firmly there, apply filler, and then cut a corresponding opening for the spots. I did it exactly like that in my prefab house, works perfectly. Unfortunately, it costs 20 euros per can [emoji4]

well, you’re not going to equip the whole house with it, in the few rooms the ceiling just needs to be repainted.