1. For the installation of doors and windows, the size of door and window openings must be reserved according to the design. The outer frames of doors and windows shall be elastically connected with the openings. The outer frames of doors and windows shall not be directly embedded in the wall. The method of installing and laying the openings at the same time or first installing and then laying the openings is not allowed.

2. For the holes made of light wall materials, the corresponding treatment shall be carried out around the holes or at the joints to ensure the reliable connection. It is strictly forbidden to connect and fix the connectors directly with the light block. The steel connectors used for the connection between the combined door and window materials and the wall shall meet the design requirements and shall not be less than 2.5mm in thickness.

3. The installation assembly of doors and windows shall be firmly connected. The distance between the two adjacent connection points shall not be more than 600mm, and the window shall be 400mm, and the corrosion-resistant filling materials shall be used to make the connection part sealed and waterproof.

4. The sliding door and window sash must be installed with adjustable limit card and other anti falling measures. The limit card should be installed above the side of the door and window sash. After the sliding door and window are installed, the frame leaf shall be free of visible deformation, the door leaf shall be closed tightly and the switch shall be flexible.

5. The measured value of the overlap between the sash and the window frame shall meet the design requirements, and shall not be less than 6mm. The measured value of the overlap between the door leaf and the door frame shall meet the design requirements and shall not be less than 8mm.

6. The sealant strip shall be reserved with expansion allowance, which shall be cut off at the corner at a 45 degree slope, and firmly pasted with adhesive to avoid contraction joint.

7. When installing the sliding brace, the fastening screw must be made of stainless steel. The fastening screw of the sliding support of plastic steel doors and windows shall be reliably connected with the reinforced section steel of the frame leaf or the local reinforced steel plate of the inner lining, and the connection between the screw and the frame leaf shall be treated with waterproof sealing.