1. Door and window frame wall joint

One point of door and window maintenance is that you need to check the high-end door and window frame wall joints frequently. If there is looseness, it is very easy to deform the frame, making the door and window unable to close and seal. Therefore, if the screws at the connection are loose, they should be tightened immediately. If the screw base is loose, epoxy superglue should be used to mix a small amount of cement to seal it.

2. Keep the door frame clean

3. The connection parts of the door and window frames

4. Dry them in time after the rain

5. Sealing strips and glass glue

6. Clean with a soft cloth and clean water

7. Do not step on the aluminum frame