Trees, hills and getting in and out
Mature oaks and maples line many Kirkwood streets. They give shade and also drop leaves, acorns and limbs, which collect in door tracks and at the threshold. Debris in a track can stall a roller and cause the door to climb unevenly. Fallen limbs after a storm can also strike a door or a garage roof.
Most trips out of Kirkwood run toward I-44, Kirkwood Road or Big Bend, and cars come and go from driveways that are sometimes sloped. A driveway that rises toward the garage can leave a gap under the door unless the bottom seal is the right shape. On sloped lots, runoff sometimes pools near the threshold, where it can rust steel and swell old wood.

