After the thermal insulation materials and products pass the site acceptance, they shall be randomly sampled under the witness of the construction unit or its entrusted supervision unit, and sent to the project quality inspection agency with corresponding qualifications entrusted by the construction unit for re inspection of their performance (including the re inspection of combustibility except for non combustible materials).
Large scale construction can only be carried out after passing the physical inspection and test; See the attachment for the Construction Acceptance Record of Sample Room (Piece) of External Wall Thermal Insulation Project.
The disclosure and training must be implemented to every on-site construction personnel.
（8） Strengthen the management of project quality inspection.
When the construction unit organizes the joint review of the construction drawing design documents, the design, construction, supervision and other participating units shall focus on the discussion on the matching degree between the external wall insulation system, insulation materials and the actual construction process and methods, so as to ensure the reliable performance of the external wall insulation system and insulation materials, and the feasible construction process, and form a written record.
（4） Prepare special construction scheme.
The competent department of urban and rural housing construction and its engineering quality supervision agency shall focus on checking whether the on-site sampling method, sampling quantity and other contents meet the relevant requirements of the Standard for Acceptance of Construction Quality of Building Energy Saving Projects (GB50411).
Those who have not been accepted by the Supervisor or failed to pass the acceptance shall not enter the next process.
The previous process must meet the construction conditions and requirements of the next process.
After each process is completed, the construction unit shall carry out process handover inspection in addition to self inspection and quality inspector inspection.
Notice on Strengthening the construction quality management of the external wall thermal insulation project of housing buildings GJZ [2022] No.
Before the construction of external wall insulation works, the General Contractor shall use the same materials and processes to make sample rooms (pieces) on site.
Before the construction of external wall insulation works, the General Contractor shall prepare a special construction scheme as required and submit it to the Supervisor for approval; If there is no supervision unit, it shall be reported to the Employer for approval.
（5） Adhere to the model leading system.
（7） Strengthen process inspection.
The testing plan shall include two parts: the re inspection of insulation materials and the physical inspection of the insulation project.
After passing the physical inspection and test, it shall be reported to the Supervisor to organize all parties involved in the construction for acceptance.
The process control of each construction process shall be strengthened.
The housing and urban and rural construction bureaus of each district and city and county (city) directly under the jurisdiction of the province, Ganjiang New Area Urban and Rural Construction and Transportation Bureau: in order to implement the spirit of the Twentieth National Congress of the Communist Party of China and the major strategic decision of the CPC Central Committee and the State Council on carbon peaking and carbon neutralization, earnestly implement the relevant deployment requirements of the provincial party committee and the provincial government, strengthen the quality management and quality acceptance supervision of the external wall insulation project of housing construction, and compact the quality responsibility of the participating units, In particular, the primary responsibility for project quality of the construction unit and the responsibility for project quality supervision of competent housing and urban and rural construction departments at all levels are to improve the construction quality of the external wall insulation project of housing buildings and help achieve the 2030 carbon peak goal in the province’s housing construction field.
Before testing, the project quality testing organization entrusted by the construction unit, together with the construction unit and the supervision unit, shall prepare a quality testing plan for the external wall insulation project.
2、 Strictly control the construction quality (III) Implement the drawing review and design disclosure system.
The Chief Supervision Engineer is responsible for organizing the project leader of the construction unit, the project technical leader, the project leader of the design unit and the project leader of the construction unit to participate in the quality acceptance of the external wall insulation project..
For the thermal insulation materials that fail to pass the re inspection, the General Contractor shall demobilize the corresponding batch of materials in accordance with relevant regulations under the witness of the Employer or its entrusted supervision unit.
9.
The special construction scheme shall include the connection between the thermal insulation layer and the main structure, the connection between the plastering layer and the main structure, the prevention of cracking and falling off, the sealing and waterproofing of the closure, the anti collision, the crack resistance enhancement of the weak parts and other detailed structural practices, as well as the protective measures for the thermal insulation layer and the fire safety measures; The special construction scheme shall also specify the requirements for material mobilization witness sampling inspection.
Encourage the use of new materials, new processes, new technologies and new equipment, and organize experts to demonstrate the special construction scheme according to the principle of “who advocates who demonstrates”.
It is strictly prohibited to use insulation materials that have not been reinspected or failed to pass the reinspection.
The sampling parts shall be determined at the construction site.
Recently, the Provincial Department of Housing and Urban Rural Development issued a notice to strengthen the construction quality management of the external wall thermal insulation project of housing buildings, emphasizing the need to strictly control the selection and use of materials, construction quality, main responsibility, and supervision responsibility, and proposed 13 measures such as reasonable selection and purchase of thermal insulation materials.
The construction technical data such as the on-site inspection and re inspection, physical inspection and acceptance records of thermal insulation materials in the sample room (piece) shall be included in the engineering technical archives.
The thermal insulation materials with performance indicators meeting the relevant standards, specifications and design requirements must be selected for the external wall thermal insulation project, and the restricted and prohibited products shall not be selected.
（2） Strictly implement the witness inspection system.
（9） Strengthen the quality acceptance of external wall insulation works.
The general construction contractor shall organize technical disclosure and necessary practical operation training in accordance with the special construction scheme and sample room (piece) in a timely manner, focusing on the key points of construction technology such as bonding, anchoring and installation, as well as the detailed construction practices such as internal and external corners, door and window openings, wall and roof junctions, so as to form disclosure records.
（6） Strengthen technical disclosure and training.
Encourage the use of external wall internal insulation, external wall self insulation, prefabricated new external wall insulation system, etc.
If the thermal insulation materials are purchased by the general construction contractor according to the contract, the construction and design units shall not designate material manufacturers and suppliers.
According to the requirements of laws and regulations such as the Construction Law of the People’s Republic of China, the Regulations on the Quality Management of Construction Projects, and in combination with the actual situation of our province, the following work requirements are proposed: I Strictly control the selection and use of materials (I) Reasonably select and purchase thermal insulation materials.
If the special construction scheme is changed, it shall be re submitted for approval.
When the design unit makes design disclosure to the construction and supervision units, it shall focus on the specific structural practices and relevant construction technical requirements for external wall anti cracking and leakage, anti air drum falling off, etc.