It's currently boiling here, so I have to have the bedroom windows open. One of my cats loves to sleep in my room, but he also climbs out of the windows. There's a little roof above the living room windows that he sits on. (It's about 10ft off the ground.) I'm worried that he's going to fall off. I've tried keeping him out of the room but he still gets in. Once he's in, he won't get out. (I've literally never met a more stubborn cat. He'll pull the carpet up by clinging on to it if he doesn't want you to pick him up.)
Any ways to prevent him getting out? Some kind of screen? 