We suspect there is a serious structural defect in the windows.
We have noticed that every word spoken from the outside penetrates the house. But not so clearly that you can understand it word for word. But you can hear immediately if someone is talking outside. Even at a great distance (10 meters +) we can also hear the noise of car engines. Not only at our immediate neighbors, but also at cars 30-40 meters away. When the neighbors start the engine or drive up in a car, we hear it very clearly.
It is interesting that if one stands inside and speaks, the one standing outside does not hear a word. However, the person standing inside hears it clearly, especially if you are standing in front of the window and talking at a normal volume (tested).
Our neighbors always say they can't hear anything outside, not even the screams of children.
I think we were cheated when they installed the windows. As far as I can tell, the windows were only generously sealed and stucco tape installed. I didn't see sealing tape anywhere. And certainly no mineral/rock wool, despite the soundproofing requirements. Some of our construction joints are 4-5 cm wide. Which, as I said, were only filled with foam. It was fully exposed to weather and UV rays for 5-6 months before the stucco was applied.
What do you think? Is this normal or more of a cause for complaint?
What are your experiences with outside noise? And does anyone know what are the window installation recommendations that should be followed anyway?