Rodent Exclusion for Crawl Spaces

Gaps Around Pipes and Wires: 

Rodents often enter through gaps around pipes, wires, and vents that penetrate the walls or floor of the crawl space. These openings can be large enough for rodents to squeeze through and can be a significant point of entry.

Vents and Grills: 

Unprotected or damaged vents and air grills can provide easy access to crawl spaces. Rodents can enter through vents that are not covered with rodent-proof screens or that have loose or broken covers.

Cracks and Holes in Foundation Walls: 

Cracks, holes, or gaps in the foundation walls or floor of the crawl space can serve as entry points. Rodents can exploit even small openings to gain access.

Broken or Missing Screens: 

If the crawl space has vents or openings with screens, ensure they are intact. Broken or missing screens can allow rodents to enter freely.

Unsealed Openings in Crawl Space Doors: 

Access doors or hatches to the crawl space that are not properly sealed or are damaged can provide an entry point for rodents. Ensure these doors are secure and have tight-fitting seals.

Poorly Sealed Seams and Joints: 

Seams and joints between building materials, such as where walls meet the floor or between different sections of the foundation, can be vulnerable if not properly sealed.

Roofline and Eaves: 

Rodents can enter through the roofline or eaves if there are gaps or damaged areas. They may also use overhanging branches or structures as a bridge to access the roof and then find their way down to the crawl space.

Openings Around Sump Pumps or Drainage Systems: 

Sump pump installations or drainage systems with improperly sealed or large gaps can be an entry point for rodents. Ensure these areas are securely sealed.

Ventilation and Exhaust Fan Openings: 

Any ventilation or exhaust fan openings that are not properly covered or damaged can provide a route for rodents to enter the crawl space.

Damage from Previous Infestations: 

Areas previously damaged by rodents, such as chewed wood or insulation, can be weakened and may provide additional entry points if not repaired properly.