The reason is that the soundproof bricks can only be sawed with considerable effort. With the 20 cm base bricks, the 2.70 interior height can be reached directly.
The base is incorrectly constructed, a wonderful thermal bridge - unfortunately too late to change it, or is insulation still supposed to be added to the walls?
The base is incorrectly constructed, a wonderful thermal bridge - unfortunately too late to change it, or is insulation still to be applied to the walls?
I don’t know much about this... how should it be done correctly?