To stop a shower door from leaking water on to your bathroom floor, install a sweep on the door's bottom. The sweep is a pliable plastic piece that holds water back and keeps it inside the shower. You can install a sweep in two ways, depending on the shower door you have -- whether you have a metal plate or a slot at the bottom of the glass shower door. As always, follow the directions in the owner's manual for your specific shower door.
Metal plate door
Loosen the screws that hold the metal plate to the bottom of the shower door with a screwdriver.
Remove the old, worn sweep by pulling it out from between the metal plate and shower door.
Insert the new sweep so its top slips between the metal plate and the glass shower door. It should run along the length of the door bottom.
Tighten the screws in the metal plate with the screwdriver to secure the sweep to the door. Cut off any protruding parts of the sweep from either edge of the door with a utility knife.
Slot shower door
Remove the old, worn sweep from the bottom of the shower door by pulling it out of the slot and away from the door.
Slide the top edge of the new sweep into the slot under the door, and press it in firmly to secure it.
Trim any edges of the sweep protruding from the sides of the door with a utility knife.