Treatment of the gap between door and window frame and wall. After aluminum alloy doors and windows are installed and fixed, concealed works should be accepted first. After acceptance, the gap between door and window frame and wall should be treated in time according to the design requirements. If there is no requirement in the design, elastic thermal insulation materials or glass wool felt strips can be used to fill gaps in layers, and 5~8mm deep notches are left on the outer surface, and caulking ointment or sealant can be filled. The installation of door sash and door window glass shall be carried out after the wall decoration of the hole is completed and qualified. After the sliding door and window are installed and fixed in the door and window frame, put the whole door and window sash with glass into the chute in the frame and adjust the gap with the window sash. For flat doors and windows, install the glass after the frame and sash are assembled and fixed, that is, adjust the gap between the frame and sash first, then put the glass into the sash and adjust the position, and finally embed the sealing strip and sealant.