Rats are incredibly acrobatic and proficient at climbing.
Can Rats Climb Walls. They're great at climbing between walls and will use this hidden network to move around your home. Rats can't climb smooth surfaces, but they can climb drain pipes, cables and other objects which will allow them to get into the walls of your home.
Noises in the Attic or Walls? How to Get Rid of Roof Rats ... from anypest.com
They can climb the brick walls with ease, ropes, cables. Learn what to do when one pops up in your toilet. You might also notice your rat explores new areas by hugging the walls or some other path in the environment.
Rats can easily get anywhere in your home just.
Mice have tiny, sharp claws on the end of each toe, and these can mice climb smooth walls? These rats aren't able to climb completely smooth surfaces, however. Mice and rats can easily climb walls, stairs and they can even jump. Snakes can climb brick walls and stone walls.