Mouse-proof construction is an essential element in an effective mouse control program. Mice are attracted to buildings when they detect openings and escaping heat. Prevent mouse entry by eliminating all openings larger than 3/16 of an inch. Gaps around pipes can be covered with escutcheons but should first be secured with steel wool and caulk or mortar to stop airflow. Since steel wool rusts, many prefer to use a copper woven-wire mesh. It doesn’t rust and its flexible design allows it to be wedged into small cracks and crevices by hand or with a flat-bladed screwdriver. Complete the job with quality caulk or mortar to eliminate air movement.
Larger openings can be secured with wood, aluminum flashing, concrete, or 1/4-inch wire mesh or hardware cloth. Doors, windows, and screens should fit tightly. Cover the edges of doors and windows with metal to prevent gnawing. Latex, plastic, rubber, boards less than 1/2 inch thick, or other soft materials are unsuitable for plugging holes used by mice because they will simply gnaw through these to gain access.
Refer to NebGuides G03-1530, Rodent-Proof Construction Structures and
G94-1217, Rodent-Proof Construction - Drains and Feeding Equipment Mouse Publication
House Mice Information
for more information.
