A poorly sealed garage door can allow moisture, insects and debris to enter your garage. Gaps under the door will also make it more difficult to maintain a comfortable temperature in the garage, leading to increased energy bills. To help alleviate these problems, you can install a rubber water stop in front of a garage door in just a few minutes. Rubber stops are available in a variety of styles and colors, and come in various lengths to fit any opening.
Open the garage door. Lay the rubber water stop on the floor between the door tracks with the ramp-side of the stop facing into the garage. Use a straightedge and utility knife to cut the rubber stop to length, if necessary.
Apply the included adhesive to the doorstop or concrete, according to the manufacturer's instructions. Place the rubber water stop on the floor and align it with the pencil marks.