Please explain the details of the defects in ceilings.
According to the Building Standard Law, floors of three-story apartments require one-hour semi-fire-resistant structures, with double layers using materials specified in construction certification documents. However, we confirmed single-layered ceilings as well as double-layered ceilings with non-specified materials.
There were inconsistent and misleading expressions in construction certification documents, which we believe lead to misunderstandings at construction sites. These misunderstandings resulted in construction defects.