Questione giuridica chiave
Whether the terrace roofs were common property or could be part of special right
Decisione estratta
The roofs remained common property as essential building elements, even if used as terraces under special use rights.
Motivazione estratta
Dächer are not rooms or units under Art. 712b(1) ZGB but essential building parts under Art. 712b(2)(2) ZGB and therefore necessarily common property.