Just to say, last year I had ours behind the standard plastic electric poultry netting. This didn't work too well, and they kept flying out over it. Because of this, I clipped their wings to keep them in, so they then took to roosting *on top* of the 6x4 shed which was their house, just to spite me! :-)
Once they got bigger they didn't seem able to fly much anyway, so were easier to keep confined.
Sorry if that's not what you wanted to hear, but I hope it's helpful!