Cool! Thanks for the episodes and the inspiration you give me in my builds. :)

It is in fact possible, and I might put loot on that roof

I love the buildings he is making and can't wait for him to build one on-screen next episode.

I only have one concern. Is it possible for someone to use the ladder on the first building shown to jump onto the ladder of the second building?

I couldn't quite tell from the video. It might not be any concern, but I hope Arkas at least checks. I don't know if he checks these posts. 

"Rooftop Madness" :: Post-Apocalyptic Adventure Map - Episode 2 [Minecraft Building Tutorial]