the water tightness and air tightness of aluminum alloy doors and windows are the main points for selecting doors and windows, and aluminum alloy doors and windows are excellent in these two aspects. for example, good water tightness can effectively prevent rainwater from entering the room when a rainstorm strikes. The air tightness is strong, and with the sealant strip, the wind proof and warm keeping effect can be achieved. 2. Aluminum alloy doors and windows use hollow glass, which has strong sound insulation effect. It also has a better sound insulation effect than ordinary wooden doors, so that outdoor noise can be reduced to a certain extent when entering the room to prevent interference with the indoor peace