How to Inspect a Used RV Before You Buy

Water is the #1 cause of RV deterioration, and damage can be present even when it's not visible to the untrained eye. Start outside: look for soft spots by pressing firmly on exterior walls and the area around all windows and vents. Look for delamination — bubbling, rippling, or separation of the fiberglass or aluminum skin from the underlying substrate. Check every seal: around slides, doors, windows, and vents. Any dried, cracked, or missing caulk is a red flag. Inside, press on the floor everywhere — especially at slide-outs, around the toilet, and near the entry door. Soft spots indicate rot. Check the ceiling at all four corners and around any skylights or roof vents. Sniff the inside of cabinets, especially lower ones near the floor — musty smells indicate past or ongoing moisture intrusion. Bring a moisture meter (available cheaply online) and press it against walls and floors; readings above 15–20% signal elevated moisture. The most thorough inspection is to get on the roof. Check every seam, every vent base, every antenna mount, and the full perimeter seal. Rubber roof membranes should not have tears, punctures, or pooling areas. An hour spent on the roof saves thousands.

Every appliance should be tested under realistic conditions. Turn on the furnace and let it cycle through a full heating sequence — not just ignition. Run the air conditioner long enough to verify it actually cools. Test the refrigerator in both 12V mode and 120V mode; if it's a propane/electric (absorption) unit, also test on gas. Run the water heater long enough to produce hot water at the tap. Turn on every burner on the stove. Check the oven. Run the microwave. Test the slide-out mechanisms — extend and retract them several times while watching for binding, unusual sounds, or wall/floor gaps on retraction. Verify the awning deploys and retracts smoothly. Test all interior lights, exterior lights, and the 12V system. Plug in to shore power and verify the converter charges the house batteries. For propane appliances, a standard LP leak detector (about $20) at each connection point adds confidence. Listen for any ticking or hissing.

Walk a slow perimeter of the RV with a critical eye. Check for any cracks or damage in the front and rear caps. Look at the frame if it's accessible — rust, cracks, and repairs are concerns. Examine the tires: check tread depth and the sidewalls for cracking (UV cracking even on low-mileage tires is common on older RVs). Check the date codes on the tires (the last four digits of the DOT code tell you the week and year of manufacture); most manufacturers recommend replacing tires over 5–7 years old regardless of appearance. Inspect the hitch coupler or fifth-wheel kingpin for wear and damage. Examine jacks and stabilizers for proper operation and corrosion. Check all exterior storage compartments for seal integrity and signs of water intrusion. On motorhomes, add a full walkaround of the chassis: fluid levels, belts, hoses, and any visible leaks under the engine bay.

A professional NRVIA (National RV Inspectors Association) certified inspector is worth the investment on any purchase over $20,000 — and especially on motorhomes or full-time rigs. Expect to pay $300–$600 for a thorough inspection that covers everything in this guide plus mechanical and structural elements that require specialized knowledge. A good inspector will provide a written report with photos documenting every finding. Many sellers will negotiate a price reduction to cover the cost of repairs identified in the report. On a $50,000 purchase, an inspector who identifies $3,000 in issues — allowing you to negotiate the price down by that amount — more than pays for themselves. Don't skip the inspection on a private-party purchase just because the seller seems trustworthy. Water damage and deferred maintenance are often invisible to non-experts and are sometimes genuinely unknown to the seller.