The Rodent Entry Point Five Companies Couldn’t Seal — a Brooklyn Case Study

NYC Pest Control · ACE-Led

Straight answers from a licensed New York exterminator and Associate Certified Entomologist (ACE) — serving all five boroughs, in English and Spanish.

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⏱ 2 min read

The short version: A Brooklyn client had called five different companies for a recurring rodent problem. Each treated the symptoms; none solved the cause — large openings around the under‑sink plumbing that rodents kept using to get back in. New York Exterminating found the entry points, sealed them with custom‑cut metal and elastomeric sealant, and the recurring problem stopped.

The problem: five visits, same rodents

By the time the client called us, they’d already paid five companies. Every visit followed the same pattern — set some traps, drop some bait, leave. Activity would dip for a week, then the mice were back. On one related job we saw the classic version of this mistake up close: bait that had been eaten completely, with the entry hole under the pipe line left wide open.

Chewed-empty bait packets and droppings beside an unsealed pipe penetration, Brooklyn
Bait eaten to nothing — but the hole under the corroded pipe was never sealed, so the mice kept coming back. Bait without exclusion doesn’t last.

The diagnosis: it’s the structure, not the bait

When our technician inspected, the entry points were obvious once you knew where to look: large gaps around the under‑sink plumbing where pipes pass through the wall and floor. That’s a route rodents will use indefinitely as long as it’s open. No amount of bait closes a hole.

Large under-sink pipe openings sealed with custom-cut metal and elastomeric sealant, Brooklyn
The under‑sink openings five companies left open — sealed by NYE with custom‑cut metal and elastomeric sealant.

The fix: seal it once, properly

We cut metal to fit each opening and bedded it in elastomeric sealant that stays flexible and bonded. To show what that looks like on an even tougher penetration, here’s a before‑and‑after from the same kind of work — a large, awkward gap around a live gas line, exactly the type most companies skip:

Large broken wall opening around a gas line before sealing, NYC
Before: a large, broken opening around a gas pipe and shut‑off valve — a difficult entry point to close.
Same gas-line opening sealed with custom-cut metal and elastomeric sealant, NYC
After: sealed for good with custom‑cut metal fitted around the line and elastomeric sealant troweled around the edges.

The result

Once the routes were physically closed, the client’s recurring problem ended. That’s the difference between treating what you can see and correcting why the rodents were there in the first place. (For the why behind the materials, see Foam vs. Metal: Why Cheap Rodent Exclusion Fails.)

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BASED ON WHAT YOU’RE DEALING WITH
New York Exterminating (NYE)
RECOMMENDED FOR RODENTS IN NYC

A Brooklyn-based, NYSDEC-registered company (Reg. #15140) led by Jorge Bedoya, an Associate Certified Entomologist (ACE). For rodents, NYE provides rodent exclusion that seals the entry points, not just trapping. ACE-led work comes with a client portal of service reports and photos, fully bilingual service, and no long-term contract.

Recurring Rodent Problem FAQ

Why do five different companies miss the same thing?

Most rodent visits are priced and scheduled around treatment — traps and bait — not the slower, hands‑on work of finding and sealing entry points. If exclusion isn’t part of the job, the cause stays open.

How do you find the actual entry point?

A thorough inspection of where pipes, conduit, and utilities penetrate walls and floors, plus rub marks, droppings, and gnawing that show active routes. The openings are usually obvious once you know the patterns to look for.

Is sealing permanent?

Metal cut to fit and bedded in elastomeric sealant is built to last and won’t be chewed through like foam. Buildings change over time, so we still recommend periodic checks, but a properly sealed penetration stays closed.

Tired of paying for the same rodent problem twice? See our rodent control & exclusion service or request a free inspection. Call (347) 210‑4646.
JB
Jorge Bedoya, ACE
Associate Certified Entomologist (ACE) · NYSDEC-licensed · Owner, New York Exterminating

Every NYE article is written and reviewed by Jorge Bedoya, who holds a degree in science and is an Associate Certified Entomologist (ACE) and licensed New York exterminator. NYE provides IPM-based, low-exposure pest control across all five boroughs — in English and Spanish.

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