This might be stating the obvious by pointing out a vertical wall.
Can Mice Climb Smooth Walls. Many people tell stories of mice climbing walls and ceilings, or jumping across countertops. They have a hard time climbing up smooth surface areas like glass, smooth metal, and smooth painted walls.
How to stop rats from climbing your walls | Preventative ... from citypests.com
We believe in helping you find the product that is right for you. Wall climbing can be a fun activity and good exercise. They can also climb walls with props (cords, cables, shelves, wires, etc.).
Silverfish cannot climb smooth plastic.
Mice are smart little critters, and one of their skills is creativity during an invasion. It can run 12 feet per second and swim as far as 1/2 mile. They can't climb on walls in a house, unless the paint has some sort of grip to it. Can mice and rats climb?