Interim Measures for the Administration of Construction Project Quality Margin Article 2 The term "construction project quality margin" as mentioned in these Measures refers to the funds agreed by the employer and the contractor in the construction project contract, which are reserved from the project payment payable to ensure the contractor to repair the defects of the construction project during the defect liability period.
"Regulations on Quality Management of Construction Projects" Article 40 Under normal use conditions, the minimum warranty period of a construction project is: (1) the reasonable service life of the project specified in the design documents for the foundation project, foundation project and main structure project of the building; (2) 5 years for roofing waterproof works, toilets, rooms and external walls with waterproof and anti-leakage requirements; (3) The heating and cooling system consists of two heating periods and cooling periods; (four) electrical pipelines, water supply and drainage pipelines, equipment installation and decoration works, for 2 years.