I used a sheet of ULX exterior grade plywood 4 x 4 sheet for floor. Anyone have pics of how they did their windows? My house is going to be for my one-legged hen and her friend. I know someone on here had lost the directions, I have mine and can send them to whoever needs them. All I can say about the instructions is the 90 minutes or less assembly time is multiplied by 3 at least if you want to do a good square job, and you need more screws and stronger nails for the roof (trim nails won't hold up for long and will work their way out). Very cute house for the price though! I love it!