Rodent exclusion comes down to sealing off the areas where rats or mice make access to a home or business. Essentially, we seal the house so that they cannot penetrate the home. It’s important to seal every entry point during this process, which means you need a thorough rodent inspection beforehand. This is because rats and mice are intelligent, and will find and use any entry point that may have been missed. Naturally, this also means that the materials used to seal entry points must be impervious to chewing. If rats and mice can get through something with their teeth they will. Some examples of rodent-proof materials are galvanized steel screen, metal flashing, and concrete. Also, things like cans of foam aren’t reliable for sealing entry points off, as rodents chew right through soft material.