Pest Prevention · Commonly Done Wrong

Waiting Until There Are Pests

Answers: How do I keep mice, ants, and wasps out of my RV? · Updated August 2026

An RV has dozens of penetrations through the floor and underbelly. Every one is a door until you close it.

Quick answer

Seal entry points around plumbing and wiring penetrations, keep food sealed, cut back vegetation, keep the sewer connection sealed, and inspect the underbelly twice a year. Exclusion works; poison after the fact does not undo chewed wiring.

What people commonly do

Setting traps and spraying inside while the actual entry points stay wide open underneath.

Why it can be a problem

Rodents chew wiring and insulation and nest in the furnace and underbelly. Ants find any crumb and follow power cords and hoses straight in. By the time you see them inside, the damage has often started.

What to do instead

Seal around every underbelly penetration with appropriate material.
Keep the sewer connection sealed at the park inlet.
Store food, including pet food, in sealed containers.
Keep the site clear of clutter and tall grass against the rig.
Inspect the underbelly and compartments twice a year.

Where they actually get in

Plumbing and wiring pass-throughs in the floor.
Gaps around the slide when retracted.
Open or torn underbelly wrap.
Refrigerator and furnace exterior vents.
Along the power cord and water hose.

Frequently asked questions

Do ultrasonic repellers work?

Evidence is weak. Sealing gaps and removing food sources works.

Follow your manufacturer first. This guide is general information from a long-term RV park, not a substitute for the instructions that came with your RV, appliances, roof material, tires, or propane system. Those documents take priority. Use a qualified RV technician or licensed trade for propane, 120-volt electrical, refrigerant, structural, and suspension work.

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