It depends on the type of weather stripping you're using. Most weather stripping is attached to the door with adhesive or screws. If you're using adhesive-backed weather stripping, remove the old adhesive before attaching the new strip. If you're using screws, drill pilot holes in the door frame and screw in the weather stripping. Make sure that the screws are tight so that the strip doesn't loosen over time.

There are a few ways to do this. You can use a staple gun, a screwdriver, or nails to attach the weather stripping. If you're using staples, first make sure that the door is closed and insert the staples into the groove of the doorstop. Make sure that you don't go too far in so that you staple the weather stripping to the door itself. If you're using screws, first drill pilot holes into the doorstop and theninsert the screws. If you're using nails, hammer them into place at an angle so that they grip both the stop and the weather stripping.