Why Buy Used — and the Risks
A new RV loses 20–30% of its value in the first year. Buying used — especially a 2–5 year old RV — lets someone else take that depreciation hit while you get a fully-equipped rig at a substantial discount. But used RVs hide problems that can cost thousands to repair. The inspection process matters.
The key principle: almost every problem with a used RV is visible to an informed buyer. Water damage stains walls, delamination bubbles fiberglass, worn seals crack visibly. The seller isn't always hiding problems — they often genuinely don't know. Your job is to find what they missed.
Exterior Inspection: Start with the Roof
The roof is the most important single inspection item. A compromised roof allows water intrusion that destroys walls, floors, and structure. You must get on the roof and inspect it. If the seller won't allow this, walk away.
What to look for:
- Cracks or tears in EPDM rubber roofing — especially around seams, vents, and AC unit
- Lap sealant (the white caulk around every roof penetration) — should be pliable, not cracked or missing
- Standing water pools or low spots that hold water
- Soft spots anywhere on the roof surface — press firmly with your fist; soft areas indicate rotted decking below
Exterior walls: Press firmly on every wall section. Soft or spongy areas indicate water-damaged structural wood. Check around every window seal and slideout frame especially carefully.
Fiberglass delamination: Stand at the corner of the RV and look down the length of the wall with light at an angle. Bubbling, waviness, or blistering in fiberglass walls is delamination — the fiberglass skin has separated from the foam core, almost always due to water. Minor delamination is cosmetic; extensive delamination is structural and expensive.
Slide-out condition: Check the slide-out seals carefully — both the wall seals and the floor seal at the bottom. These are common leak points. Operate every slide while inspecting the weather-seal contact all the way around.
Interior Inspection: Follow the Water
Water damage shows up as staining, soft flooring, warped cabinets, and mold smell. Check:
- Ceiling corners around windows — water staining appears as brown rings or streaks
- Floor around the toilet, shower, and slide-out room edges — soft floor means water damage below
- Under every sink cabinet — check for staining, soft floor, or active moisture
- Smell: musty odor is mold. Fresh air spray or scented candles are a red flag that someone is masking a smell.
- Slide-out room ceilings and inner walls — water often enters at slide top seals and runs down inside
All appliances on: Test the refrigerator in both gas and electric modes, the furnace, AC, water heater, microwave, stove burners, and all 120V outlets. Bring a simple outlet tester ($8 at any hardware store) to verify outlets are wired correctly.
Fresh and waste water systems: Fill the fresh tank, pressurize the system, and check all faucets, the shower, and under every sink for leaks. Fill the toilet and watch for bowl draining. If the seller can't or won't let you run water, this is a red flag.
Mechanical Inspection (Motorhomes)
For motorhomes, apply standard used vehicle inspection principles on top of RV inspection:
- Check engine oil condition (should be clean, not black/milky)
- Inspect coolant for contamination (milky = head gasket issue)
- Look for fluid leaks under the coach when parked
- Check tires: look at age code (DOT date stamp on sidewall — four digits, e.g., "2419" = week 24 of 2019). RV tires older than 5–7 years are high risk regardless of tread depth
- Transmission: should shift smoothly through all gears; harsh shifts indicate wear
- Consider a pre-purchase inspection by an RV technician or mobile RV inspector ($150–$400) — worth every dollar on a major purchase
Red Flags That Should Make You Walk Away
- Seller won't let you on the roof
- Seller won't let you run water or test appliances
- Fresh paint or new carpet in specific areas (masking damage)
- Strong air freshener smell throughout
- Soft floor anywhere — especially around slides, toilet, shower
- Extensive delamination on exterior walls
- Missing or cracked lap sealant on roof without documented maintenance
- Title in a different name than seller with no explanation
Related: Choosing the right RV class · RV insurance shopping guide · First RV trip checklist
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