The roost has a typical 4 rung high roost made of wood closet pole, but found they prefer a shelf. So... I also have a 1X8 (Trex composite type material) shelf around each wall about 4 1/2 foot high. It is easy to scrap and clean.Tell me about the roost boards. So you put new ones in each day? What do you use? Do you just chuck them in the garbage? Need to know!!!