ᐅ Mold in Older Homes, Incorrect Window Installation, and Explanation of the 2004 Regulation

Hello,
I moved into a renovated older apartment in 2005 and soon experienced mold and moisture issues on the exterior walls. Meanwhile, the situation has escalated to a legal dispute. In my opinion, the problem is caused by the walls being too cold because they do not match the new windows. I have the following question:
The apartment was renovated in autumn 2004. All windows were replaced with new insulated glazing windows. The walls remained unchanged (28 cm wall thickness - no thermal insulation). The apartment was expanded by incorporating a former garage. This increased the living area from 79 to 97 square meters (850 to 1,044 square feet).
Were there any laws or regulations at the end of 2004 that apparently were not followed, and if so, which ones?

Yes, that sounds reasonable, but unfortunately the information provided is not sufficient for a remote assessment. However, a wall thickness of 28 cm (11 inches) is quite thin if there is no insulation and new windows have been installed (even if that was back in 2004).

As mentioned, it’s not that simple to make a judgment without inspecting the situation on site.

Whether laws or regulations have been violated is also not easy to answer here, as it is unclear what specifically you are referring to — the living space ordinance, energy saving regulations, building permit/planning permission?

If there is a legal dispute, an independent expert evaluation will sooner or later be ordered.

Thank you for your response,
I am referring to the energy saving regulations. If you convert a garage into living space, doesn’t the newly created living area have to comply with the current energy saving regulations?