I turned an old children's play house into a coop this spring. Now that its getting colder I'm thinking its will need some work. It's got 3 empty " windows" that I put chain screen over on 3 sides to stop any animals from getting in, the walls are made from boards and you can see through the spaces between them pretty well. The roof is metal. I looked at cheap "hardboard" at menards last time I went to town, it's that stuff that's stronger than cardboard but not quite wood. I was thinking of lining the inside of the coop in that to stop drafts, and putting plexi glass over the windows. The way the play house is constructed there is a gap between the roof and the sides it sits upon, not much but should I cover this or leave it for ventilation? I'm in the process of building a new feeder for in the coop and trying to think of an alternative for water to keep it unfrozen without a source of electricity...