Stopping air escapes from the upper and sides of overhead doors are able to make your garage more comfortable also, if it is warmed, more energy-efficient. Garage door weatherstripping is cheap, easy to install and pays for itself over time in power savings. Sealing round the door also helps keep dirt, insects and tiny animals from entering the garage and possibly your home. You may pick up overhead garage door seals and installation supplies from the regional hardware or home improvement store.

Measure the top and either side of the overhead door opening with a tape measure and mark the center of the top outside trim with a pencil. Add the dimensions to obtain the total period of weather cutting required, then add 6 to 8 inches for overlap trimming.

Cut the weather seal into the total length needed — including the 6 to 8 inch excess — with a utility knife. Mark the center of the strip with pen.

Close the garage door and set up the stepladder at the center. Match the center mark of the weather seal with the center mark of the garage door trim.

Press the long edge of the seal against the garage door and hammer a nail through the short edge of the seal to fasten it into the trim.

Pull the weatherstripping taut–without stretching it–to a single side and fasten it with nails each 8 inches. Press the curved edge of the strip against the garage door as you move together.

Bend the door seal at a 90-degree angle when you get to the trim corner and nail it around 1 inch in the ends of their side and top trim bits.

Continue securing weather seal along the side trim, forcing the final nail around 1 inch in the bottom finish of the trim. Fold the excess seal at a 90-degree angle at the garage. Complete the seal installation along the remaining half of the top and down the other side of the door opening.

Trim the excess seal on each side of door seal so it fits neatly against the garage flooring, with the utility knife.