Sound problem: Does noise come through masonry - through the exterior plaster?

Really, why? How is the situation with you, Alex?

So.. the base plaster is now on it, unfortunately no improvement at all. The noise can still be heard very clearly through the masonry.. now a approx. 5 mm plaster layer will follow, will that help? I really hope so!

The roller shutter boxes are also still "empty," quite a bit can get through there too, right?

Sure, it's like a hole

Yes, that is then clear why it did not bring any improvement. The roller shutter box is already a weak point anyway... open, yes, then even more so.

Is the roof already insulated? With us, so far there is only interior plaster (also Poroton 36.5) and the noise comes through the uninsulated roof. That is obvious, as there is only an underlay and tiles on top...

I am very interested in your experiences / opinions

Regards
Patrick

Lack of planning, poor workmanship, and poor choice of building materials.

At this point, I would have only worked with calcium silicate brick masonry and also only installed external roller shutters on the masonry, and the method of mounting the windows should also have been planned. In addition, noise could also come through the roof. Money saved in the wrong place.