Rats and Mice may enter buildings at ground level through small openings in the fabric or at roof height by climbing walls directly or with the aid of unguarded cables and external pipes.

Their climbing and jumping abilities and size enable them to move freely in cavity walls.
These characteristics must be taken fully in to account before buildings can be effectively proofed.
If you are in any doubt, heard scratching noises in the attic or have experienced damage to food stuffs and property call now.