our coop is being built out of both old and new materials... all the framing / floors etc ( 2x4s / 2x6's ) are new, the roof we used old steel we had lying around and siding we used old barn boards we have ( they are probably 120 years old ) but they are solid.. the windows recycled from what we have laying around the farm as well... I think a good balance between recylced and new is good.. you want the coop to last but I dont see the point in spending 1000$ of dollars to do it ( especially for anything under 20 chicks )... I also agree w/ everyone when it comes to your significant other grabbing the ropes and running.. ( usually farrr away from you )... I gave my bf the written plans, but being a dairy farmer/handy man/self proclaimed mr. know-it all.. ( bless his heart lol ) he just looked at me, and said " yah well just build it as we go ".. not something I wanted to hear lol... but anyways... a few weeks later our coop is almost done, it needs windows, insulation etc, and needs to be moved from the shop to its permanent home... but Im thankful for his skills everytime I go down to check out our little babies... Even tho Ive been pulling my hair out from day one, wondering what our coop will look like in the end...