Hello, I did have a search but couldn't find too much specific. I am in the process of choosing a design for a backyard coop for three chickens. (Some confusion over dimensions led me to believe an ark was out of the question, but someone set me right.) I was planning to build a big rectangular thing with a large flat felt covered roof (already have the board & felt). But am now thinking an ark might be more convenient. My main concern is how to stop water getting in? The pictures of ark coops I have seen, show wooden slats as the angled wall/roof. I dont understand how this prevents water seeping through gaps during heavy rain? Im also wondering about suitable materials to use for the peak of the roof, to make that part watertight too. Any ideas?