So I've outgrown our cheap crate coop and need another 4 season coop. List of materials so far... 24-2x2x8' 2-3/4" Sheets of Plywood 1-1/2" Sheet of OSB 2-Sheets of T-111 First off the floor. I've learned a few things about coop construction starting with the fact that the floor dictates size, everything starts from there. So I build my floors smaller than the end panels by the thickness of the sheathing (more on that later) Next thing is the end walls. I cut one sheet of T-111 in half, then screw the two halves together and cut the roof angles off of both sheets at once, you know so they match. Now I start framing up the end panels. You can see here how I marked the floor dimensions on it and only brought the 2x2 to that line. Also I keep the 2x2's on the side inside the panel by the thickness of the T-111 siding. End panel framed and mounted to the floor. Here's the reason I carry the end panels past the sidewalls. By doing it this way there is no need to cut the top of the sidewalls at an angle to get a nice tight fit with the roof Roof is now framed. One side panel mounted. This one has the joint in the middle because I'm going to have two doors on this side. If you look closely you'll see that on this side I moved the joint in the side panel to make room for my nest boxes, which are now framed up. Nest boxes built. I've got to cut out all my doors and build all my windows yet but I'm moving along nicely.