Rodent Management
Rodent Control in South San Francisco, CA
101 Exterminators does rodent control in South San Francisco exclusion-first — find the openings, seal them, then trap — California licensed under SPCB Lic. #9119 and working since 2005. This city has San Bruno Mountain along one border and the Bay marsh at Oyster Point along the other, and those two edges send two different rats at the housing in between. Where we start depends on which one you have.
Warning Signs
Signs You Need Rodents Service in South San Francisco
Our program combines three components: (1) Exclusion — sealing gaps in foundations, pipe penetrations, vents, and roof eaves using hardware cloth, copper mesh, foam sealant, and sheet metal as appropriate. (2) Trapping — placement and monitoring of snap traps, live traps, and glue boards in active areas. (3) Exterior bait stations — tamper-resistant bait stations positioned along perimeter rodent runways for ongoing population management.
Droppings along walls, in cabinets, behind appliances, or in attic insulation
Gnaw marks on wiring, wood, plastic pipes, or food packaging
Grease marks along walls or baseboards — oil from rodent fur rubbed repeatedly on surfaces
Nesting materials (shredded paper, insulation, fabric) in hidden locations
Scratching or scurrying sounds in walls, ceilings, or under floors at night
Burrows in landscaping, mulch beds, or under concrete slabs
Citrus or avocado fruits with bite marks — a classic roof rat indicator
Pet acting alert at walls or cabinets when no visible cause exists
How It Works
Our Rodents Process in South San Francisco
Every job follows the same methodical approach — no shortcuts, no guesswork. Here is what to expect when you work with us in South San Francisco.
Inspection & Runway Mapping
We identify gnaw marks, runways, burrows, droppings, and grease trails to map rodent activity throughout the property — interior and exterior.
Exclusion
We seal all discovered entry points with durable materials appropriate to the opening — hardware cloth, copper mesh, sheet metal flashing, or foam sealant for smaller gaps.
Trapping & Bait Placement
Interior snap traps and exterior tamper-resistant bait stations are positioned along active runways. We monitor and service these on a schedule until activity ceases.
Follow-Up & Monitoring
We return to clear traps, replenish bait, check exclusion work, and confirm that the population has been eliminated before closing out the service.
Why 101 Exterminators
Rodents You Can Count On in South San Francisco
Exclusion-First Methodology
Without sealing entry points, any rodent removed will simply be replaced by another. We seal the structure before or concurrent with trapping — not as an afterthought.
No Unmonitored Poison Bait Indoors
We do not place loose rodenticide indoors where rodents can carry it to walls and die inaccessibly. Interior work uses traps with daily monitoring during active treatment.
Regional Species Knowledge
Norway rats, roof rats, and deer mice behave differently and require different approaches. We identify the species present before selecting treatment methods.
Sanitation Recommendations
After resolving an infestation, we advise on harborage removal, vegetation management, and food storage to prevent reinfestation — not just a repeat service call.
Common Questions
Rodent Control FAQs for South San Francisco
Something runs across the ceiling of my Buri Buri house at night — rats or squirrels?
Noise after dark is usually roof rats; daytime noise is usually squirrels. Roof rats move at dusk and again before dawn, and in South San Francisco's hillside neighborhoods they reach the roof by branch rather than by wall. Check the attic hatch for droppings or a greasy rub mark along a joist, and look for any limb overhanging the roof. Trimming that limb removes the route, but the entry still has to be sealed.
Do buildings near Oyster Point get a different rodent problem than homes up the hill?
They mostly get Norway rats. Norway rats burrow along creek banks, riprap and storm drains, and the Colma Creek estuary and marsh edge at Oyster Point is continuous habitat for them. In ground-level buildings along Gateway Boulevard and Oyster Point Boulevard they come in low — a door sweep gap, a utility penetration at the slab edge, a floor drain, a dock leveler pit. Those inspections start at the ground line and the loading area, not on the roof.
Can mice get into a newer South San Francisco townhome with no crawl space?
Yes — slab construction just moves the openings upward. Mice use garage door seals, dryer vents, utility and plumbing penetrations at the slab edge, and roof-to-wall transitions on attached units. A house mouse fits through a gap about the width of a pencil, and shared walls in attached construction let them move between units without ever going outside. On slab properties we spend the inspection on the garage, the utility chases and the roofline.
Local Pest Pressure
Common Pests We Treat in South San Francisco
Every area has its own pest profile shaped by climate, housing, and geography. These are the pests we see and treat most often in South San Francisco — tap any one to learn how to identify it and what treatment involves.
Rodent Control · South San Francisco
Free Limited Rodents Inspection in South San Francisco
CA licensed and insured. Written estimate before any work begins. Same-day response available for urgent situations in South San Francisco.