tried using some scrap wood we had, and it was too twisted and bowed, more aggrevation than it was worth. idea is nighttime coop is UPSTAIRS, and protected underneath for when we arent around, I will build a flight pen, or a "run" that connects up to this as well. Needs another day or two of my attention. all screwed and glued together, should be around $200 in materials when all said and done. meant to house my 4 full sized chickens.