Water Supply

• To help prevent any further leakage, the first thing you should do when dealing with a leaky toilet is to shut off the water supply valve. These valves can be found mounted on the wall or floor behind the toilet tank. You can help identify the valve by tracing the water supply hose or line leading from the sink back to the hose. Rotate the knob on the end of the tank clockwise to cut off the water supply.
  
  

Toilet Removal

• To inspect the floor for damage from a leaking toilet, it is necessary to remove the fixture. Once the water supply has been cut off, empty the toilet by flushing. Unbolt the tank and remove from the back of the toilet, and unscrew the water supply hose or pipe. The toilet is held by two bolts to the flange in the floor. Once the nuts on these bolts are loosened, the toilet can be removed.
  
  

Floor Inspection

• Clean up any wax ring remnants or caulk that may be on the ground around the toilet. Remove any floorboards or tiles that were damaged by the water. Laminate flooring can be pried up with a crow or pry bar, while tiles should be loosened with a chisel or pry bar. Clean up any mold or mildew as you work. Treat areas that may have mildew by spraying or painting them with a mildew remover or mildew-resistant primer.
  
  

Replacing Damaged Tile floors

• After the damaged floor has been removed, it should be replaced with matching floor coverings. For tile floors, this means chipping off the old tile adhesive. The new tiles are measured, cut and laid into position. When the fit of the tiles are all good, new adhesive is laid out over the floor and the new tiles applied. Apply grout to seal the spaces between the tiles and then a sealer on top of the new tiles and grout.
  
  

Replacing Damaged Laminate Bathroom Flooring

• For a laminate floor, this will require that you dip into your overage floorboards. When a new laminate floor is set down, builders will typically purchase 10 percent of the square footage and set it aside for replacements. This is a good reserve to have as the original laminate may no longer be sold. Once the moisture barrier and padding is set down, the laminate is cut to size and snapped, glued or nailed into place.