Keep Rodents Out of Buildings and Apartments
Large Openings Give Rodents Access
Check for large openings of all kinds that give rodents access points and travel routes, including:
- All utility entry points, underground electrical and communication trunk lines, and exhaust vents for clothes dryers.
- All roof joints for tightness and presence of flashing: rats and mice have access to the roof via wires, pipes, plants, or rough-textured walls.
- Roof and sewer vents for adequate screening and sealing, including presence of tight roof jacks.
- Above ground electrical conduit (often at meters or circuit breaker panels).
- Water and gas lines.
- Cracks in concrete slabs.
- Brick or concrete block walls or worn/damaged drain covers.
- Air ducts, elevator shafts, and laundry chutes.
Other large openings that permit entry of squirrels, mice, and rats include:
- Poorly sealed heating and air conditioning ducts.
- Roof and wall vents installed without strong, well-attached hard-ware cloth screening.
- Roof and wall joints.
- Edges without properly installed metal flashing.
- Doors hung unevenly, too high, or lined with unprotected soft rubber weather stripping.
Once rodents have entered walls, they generally have ready access to much of a building via holes for utility pipes and wires in the framing and overhead suspended ceilings or other types of construction adjacent to utility enclosures.
Power lines have always been a favorite route of travel for rodents, especially roof rats and squirrels. Refuse and food handling areas are likely to have the greatest rodent population.
House cat eating house plants. Sprayed Rataway Fragrance on the house plants. The cat stopped chewing.