We are using 7 ft tall metal stakes (the kind used for pasters), they run about $5.50 each at Lowes. If you want to use the small wire on the bottom about 2-4 ft tall (I'm thinking rabbit cage wiring) and then utility fencing on the last few feet and the roof (a full grown chicken shouldn't be able to get thru that). You could also use OSB board for the roof, be sure to paint it with an outdoor paint (you can pick up reject cans that came out the wrong color for about $5 or so).