How Do Rats Get into Your House?

Sep 14, 2026 | Animal Removal

Discovering rats inside your house is every homeowner’s worst nightmare. These opportunistic pests don’t need a wide-open door to invade your space; they only need a gap the size of a quarter. Once inside, rats cause severe structural damage, ruin insulation, and pose significant health risks to your family.

Understanding how they get in—and what it takes to permanently keep them out—is the first step toward reclaiming your home.

free rat inspection

Common Rat Entry Points Around Your Home

Rats are master climbers and expert excavators. They inspect your home from the ground up, exploiting the smallest flaws in construction or wear-and-tear over time.

roof rat exclusion fencing on roof line

Roofline & Attic Access Points

  • Soffit, Fascia, & Builder Gaps: Whether you call them soffit gaps, fascia gaps, roofline gaps, ventilation gaps, construction gaps, or builder gaps, they all mean the same thing: open access for pests. Contractors and builders leave all kinds of structural gaps along the roofline for ventilation or framing clearance, and rats exploit every single one of them. Regardless of what name they go by, these open areas must be professionally sealed to keep rodents out.
  • Gable Vents & Cable Penetrations: Utilities run through gable vents often leave open spaces that rats easily chew through.
  • Roof Vents & Attic Fans: Unscreened or plastic vents are no match for rodent teeth.
  • Uncapped Chimneys: Open chimney cap gaps or flues act as direct highways into the box of the chimney, which leads to the attic or your living space.

animal proofed crawlspace ventFoundation & Crawlspace Access Points

  • A/C Line Penetrations: Air conditioning lines running into the home frequently leave unsealed gaps in exterior walls.
  • Foundation Vents & Missing Mortar: Damaged vent screens, loose bricks, or deteriorated mortar create simple entryways at ground level.
  • Gaps Around Pipes: Utility pipes entering through concrete, bricks, or siding rarely fit snugly without custom sealing.
  • Rotted Crawlspace Doors: Wooden doors near soil often rot at the base, leaving gaps wide enough for an entire rat infestation.

The Hidden Dangers: Property Damage and Health Risks

Rats never stop chewing. Because their teeth grow continuously, they gnaw on structural wood, PVC plumbing, and electrical wiring—creating serious fire hazards hidden behind your walls.

Beyond structural threats, rodents carry dangerous pathogens transmitted through droppings, urine, saliva, and nesting materials:

  • Leptospirosis & Hantavirus
  • Salmonellosis
  • Parasites (fleas, ticks, and mites introduced into your living areas)

Additionally, rat urine and feces contaminate attic insulation, destroying its thermal efficiency and filling your home with foul odors. In severe cases, full attic restoration—including complete insulation removal, sanitization, and re-installation—is required to restore healthy indoor air quality, after the home has been animal-proofed from top to bottom and the rats are gone, of course.

Why Professional Animal Proofing is Essential

Tossing a few traps in the attic or slapping foam over a hole will not solve a rat infestation. Spray foam is easily chewed through, and DIY fixes routinely fail because they leave hidden entry points open.

Solving a rodent problem requires precise, time-tested exclusion techniques.

foundation and crawl space exclusion for roof rats

Our Step-by-Step Exclusion Process

  • Comprehensive Inspection: We identify every current and potential entry point from foundation to ridge vent.
  • Targeted Trapping: If major structural or construction repairs are required prior to final exclusion sealing, we manage and control the active rodent population using professional trapping methods first.
  • Permanent Exclusion Repair: We install heavy-gauge steel mesh, custom metal where cosmetically needed, and commercial-grade sealants that rats physically cannot penetrate.

Guaranteed Protection with Attic Kings

When you want the job done right the first time, turn to the proven experts. At Attic Kings Animal Removal, our reputation for quality and thoroughness speaks for itself across the web. We don’t just clear out pests; we back our physical exclusion work with our Lifetime Renewable Guarantee Program.

Under this optional annual program, if a rodent ever finds a way back through our exclusion work, we service, trap, and re-seal the problem at zero extra cost to you.

Take Back Your Home Today

Don’t wait for a minor rodent issue to turn into costly structural repairs or health hazards. Trust the proven exclusion specialists to protect your structure for life.

Ready to rat-proof your home for good?

Call Attic Kings Animal Removal today or visit www.attickings.com to fill out our quick contact form and schedule your detailed home inspection!