Ground connections: every one is a ladder.
Anything that touches the ground and the RV at once is a way up: the power cord, the water and sewer hoses, the tires and the stabilizer jacks. Guard each one, or lift it off the ground.
Why the ground comes first
The mouse-proof standard. Every RV and motorhome can be made mouse-proof. Seal for the smallest invader, the mouse, and you’ve closed the gaps the bigger ones use too. What the standard means →
A rough rule of thumb, from what we’ve seen: deer mice tend to keep their nests about 10 feet apart, and stay within about 12 feet of a way up from the ground. It’s a general rule from experience, not a measured figure. It’s also why the ground connections come first.
What to guard, one by one
- Power cord, water hose and sewer hose
Fit a funnel-shaped metal guard on each line, wide end facing down, so a climbing mouse runs into the underside of the funnel and can’t get around it. Make sure the guard doesn’t pinch or cut into the cord. Keep lines off the ground where you can, and disconnect and cap the sewer hose when you’re not using it.
- Tires
Tires are made for grip, which makes them easy to climb. Use smooth tire covers that reach all the way to the ground, with no gap at the bottom. Take them off before you drive.
- Stabilizer jacks
Raise the jacks when you can. When they have to be down, fit smooth sleeves around them that a mouse can’t grip.
- Everything else that touches
Steps, a ladder, a hitch, or anything stored underneath or leaning on the RV is a way up too. Lift it, move it, or guard it.
An old idea, still working
Sailors have long fitted metal guards on mooring lines, so animals on the dock couldn’t climb the lines and get aboard. A New York office tower finished in 1927 shows the same idea in metal: the struts that hold up its entrance canopy are made to look like a ship’s mooring lines, each with an inverted, funnel-shaped guard (NYC Landmarks). Your RV’s cords and hoses are its mooring lines. Give them the same guard.
The rest of the RV
Already have mice inside? Catch the ones inside once, and clean up safely →
Sources
- New York City Landmarks Preservation Commission, Landmark designation report, 2016 (a 1927 office tower on Lexington Avenue)
Facts on this page were checked against each source on October 30, 2026.
Find the gaps. Seal them for good. Catch the ones inside once. No poison, ever.