Hi. Looking for some help. I just had 2 storm doors installed. When I checked over the work, I noticed that the installer left a small space in the bottom corner of each door (handle side of door-not hinge side). When I asked him about the space he indicated that it was necessary to leave some space because you have to allow for air to vent. He also indicated that w/o the space you'd get condensation. Wondering if there's any truth to this??? Thank!!!