Use chew-proof materials like stainless steel mesh (1/4-inch), steel wool (packed tightly with caulk), or concrete. Avoid using only expanding foam, as rats can chew through it.
Getting rid of requires a multi-layered approach called , which focuses on removing their survival essentials: food, water, and shelter . 1. Identify Entry Points and Signs HOW TO GET RID OF RATS
Rats are nocturnal and adaptable, so you must first find where they are active. steel wool (packed tightly with caulk)