I have found some great coop ideas, and some people give great building details, but it seems that just about everyone glosses over the roof construction. I don't know if people are like me, and just don't understand it enough to explain, or they think it is so simple that we should know how to do it, but I have found it very hard to get framing information on roofs. I am wanting to build a 5 x 10 coop with a simple shed roof. 7' in the front and 5 1/2' in the back. I believe that would be a 3/12 pitch. What I need to know, how do you cut the birdsmouths in the rafters to fit over the top plate on the front and back wall? Any carpenters please help.