How Do You Fill a Mouse Hole?

Fill small holes with steel wool. Put caulk around the steel wool to keep it in place. Use lath screen or lath metal, cement, hardware cloth, or metal sheeting to fix large holes. These materials can be found at your local hardware store.

Should I block up a mouse hole?

Should You Block Mouse Holes? The short answer is “No.” Blocking off a mouse's entrance and exit point inside a house can lead to more damage to your home as they try to chew their way to freedom. Sealing them off completely limits your ability to trap them.

Can mice eat through expanding foam?

As the foam expands, it creates thousands of holes through which air can still pass. This allows mice, which have extremely sensitive noses, to smell what is on the other side of the hole. If they smell food, they will chew through the foam and still get into your property.