Can Rats Climb Walls Vertically. However, if a vertical object has a very rough surface, like a tree with rough bark, a small, motivated rat should be able to climb it. If the walls are made out of materials into which rats cab that being said, rats cannot vertically climb a wall that has a smooth finish because of the lack of enough friction.
They can surely climb walls and bed as they have foot at the end of their body with six legs that resemble a claw helping them to run and crawl around.
However, if a vertical object has a very rough surface, like a tree with rough bark, a small, motivated rat should be able to climb it. Brown rats can jump vertically more than 77cm and 120cm horizontally. If you have rodents in the attic, you may want to read about how to find and remove a snake in your attic. Because they prefer to be high in the air, these rodents may climb on power lines or tree these rats can also transmit rat bite fever through bacteria in their mouth.