Chickens on the Roof

I took these pictures through the dining room window. At times there can be four or five chickens outside the window at the same time, often seemingly confused that they can't get at the plants. I have tried repeatedly to figure out how to keep Penny from flying from the roof over the gate and out into the driveway. She has made a nest under the bay window out front and can't wait to get out there to lay her eggs. She can't be kept in, and won't believe me when I tell her that she is in great peril. I think she's the only one who is laying at this point. I put a lovely delux nest in the chicken house, but so far no one has gone near it. When there are any eggs in the morning, they are on the floor in front of the door, or out in the front garden. All of my attempts to block her path have so far been miserable failures.