Questão jurídica principal
Whether the building contract required only the minimum sound-insulation standards under SIA 181 or enhanced standards
Decisão extraída
Only the minimum requirements under SIA 181 were owed; where those were not met, the seller had to remedy the defects.
Fundamentação extraída
The building permit documents showed that normal SIA requirements were ensured and that the authorities' conditions had to be met. Increased standards had not been contractually agreed.