Many people mistakenly believe that squirrels don’t chew through any metals. And while some metals like stainless steel and galvanized steel are hard enough to stop squirrels, sheet aluminum is soft enough for the squirrels to chew through.Click to see full answer. Herein, what can Squirrels not chew through?Steel of some kind, often in the form of steel mesh, or hardware cloth as it is known, is a good choice. Squirrels can’t chew through steel.Furthermore, can squirrels chew through aluminum? Yes, squirrels can easily chew through aluminum and other soft metals such as copper. A squirrel will gnaw through this metal if it locates a food source on the other side or is in trying to make a nest in your attic. Just so, what can squirrels chew through? STEP THREE – Seal All Entry Points Except for Main Hole Establish which access hole is the main entry point; do not close this hole. Seal ALL other holes with galvanized steel sheeting or heavy wire, squirrels can simply chew through wood, plastic, aluminum or steel wool.Can squirrels chew through walls?Will Squirrels Chew Through The Ceiling or Wall – Squirrels will chew through virtually anything they see. It is imperative for them to chew in order to grind down their constantly growing teeth. Once they are living in your attic, squirrels will investigate to see what they can find, and often crawl into the walls.