I have the coop built now and with suggestions of other members in hot climates i built it with one side all hardware cloth except the door. It is still getting chilly at night here so i have been covering the one side with sheet foam insulation at night being the chicks are only 5 and 6 weeks old. I was wondering if i need to worry about drafts at night if the temps are in the 70s and up at night. The open wall is facing north and we dont really get much north wind at night unless there is a big storm. It also has a covered roof that overhangs 4' out beyond the wall. I was thinking of installing a shutter type of cover over the open areas so i can close it up if needed. Any thoughts are appreciated.