When the pure basement ceiling and exterior walls of civil buildings are above the freezing line, the waterproofing method of the basement ceiling and exterior walls shall comply with the requirements of Article 4.
2.
1 of the General Code for Waterproofing of Buildings and Municipal Engineering GB 55030-2022.
Do they still need to meet the requirement of the fourth clause of Article 4.
1.
5 of the General Code for Waterproofing of Buildings and Municipal Engineering that the concrete impermeability grade shall not be lower than P10?.