Robert believes that just because a building is tall, it does not make the climb interesting. This is part of his criteria when surveying buildings. "Architecturally beautiful buildings. Buildings that are beautifully designed," he said when describing skyscrapers that stir up his will to challenge climbing it. "Same goes for women too, right?" quipped Robert in a playful manner typical of the French. As he toured the city's skyscrapers, the building that piqued his interest the most was a building with beautifully designed curved lines along with height (the name of building will remain confidential as per Robert's wishes).
What does Robert look at to determine whether a building can be climbed? "I look at whether I can put my hands and feet in the crevices of the structure to stabilize myself, and whether there are horizontal sections where I can rest my hands and feet. I also check whether the building's strength is sufficient by actually pounding my hands on the building," explained Robert. Robert didn't survey the buildings by just looking at them from a distance. He went right up to the bottom of the building and checked the building materials by hand. He did this every time, without fail.

Of course, there are times when he has to determine that a building can't be climbed.

Robert states, "If I don't have a place to latch my hands and feet, it's basically impossible. Even if there were places to latch my hands and feet, if they were too far apart, I won’t be able to climb." There are relatively few buildings around the world with places to secure hands that are conveniently located at regular intervals. It goes without saying that architects design buildings with design in mind, and not for humans to climb the building. Inevitably, Robert must carefully check the slight bumps and crevices in the building walls. While sipping coffee during the break before the awards ceremony, he put his hands on the table and said, "As long as I have this much room, I should be fine." The length was about 2 cm, enough to allow the first joint of a finger to latch on. The existence of this slight projection is his decision criteria. When looking at photos of some of his climbs, it seems as if there were no bumps and crevices, and that his hands and feet were suctioned onto the walls.