So we just got the 2005 Rockwood 1640ltd, we opened it up for 8 days, now ready to close it and cover it. it will sit in the backyard, on concrete, with a car cover on it, cheap ADCO. I notice that when it is all closed up, there is a 1/2 in gap between the top of the door and the bottom of the pop up roof. Doesnt appear to be a way to completely close the gap. What do people do to seal that gap better. ? maybe a strip of weather strip?? help.