I just had my old garage sided and new windows installed. The carpenter said he could install the new overhead door too. Well, I did not notice it at first, but the door is crooked. When you are looking at it straight on, the left side is higher than the right and there is a gap on top on the left. The door does however touch the concrete on both sides. My old door closed fine. His statement was, "well in these old garages, nothing is even!". Well, my old door worked fine, but it was very heavy and starting to rot. Both the new and the old have paneled fronts so the new one installed is very apparent. In addition, I'm afraid when the snow hits, it is going to build up snow and ice in that gap on top and then the door won't open at all. Can anyone tell me what he did wrong and how I can correct it. BTW, he is a licensed contractor so I did not think I would have any issues. SURPRISE!