Sheathing
After the building was framed, it was time to sheath and protect the OSB from moisture. I had a 52" roll of tyvek in my shed so I would need to tape the seams, but it cost me nothing extra and worked just fine. Same goes for the vinyl flashing around the door and nesting box opening. I also started installing the vinyl siding parts at this point, so that the siding would go smooth when I started. I had surgery right after I got the coop to this phase so there was a delay where I couldn't do any work on it, but it was sealed for water and would be there when I recovered.