How to Prep Your RV for Long-Term Storage: The Full Guide

Planning for Long-Term RV Storage

Whether you are storing your RV for a few months or a full year, preparation separates RVs that come out of storage ready to roll from those that need weeks of repairs. These steps apply to Class A, B, and C motorhomes and travel trailers.

1. Deep Clean Inside and Out

Wipe down all interior surfaces, vacuum thoroughly, and remove all food — including canned goods that can freeze and burst. Clean the refrigerator, leave the door propped open, and empty holding tanks completely. Wash the exterior and apply a UV-protectant wax. Mold and oxidation are the two biggest enemies during storage.

2. Stabilize Fuel

Add fuel stabilizer (follow product instructions for ratio) to a full fuel tank. Run the engine for 10–15 minutes to circulate stabilized fuel through the carburetors or injectors. Ethanol fuel left untreated for 60+ days forms varnish deposits that clog fuel systems.

3. Change Engine Oil

Used engine oil contains acidic byproducts of combustion. Storing an engine with dirty oil accelerates corrosion of cylinder walls and bearings. Change oil and filter before storage, run briefly to circulate, then shut down.

4. Charge and Disconnect Batteries

Charge house and chassis batteries to 100% before storage. Disconnect the negative terminals or install a battery disconnect switch. Connect to a trickle/smart charger if possible — batteries left uncharged below 12.2V sulfate and lose capacity permanently.

5. Winterize the Water System

Drain all water from tanks, lines, and the water heater. Either blow out lines with compressed air or add RV antifreeze (non-toxic propylene glycol type) to all lines including the toilet. One frozen water line can cause thousands in damage.

6. Protect Tires

Inflate tires to maximum cold PSI listed on the sidewall. Move the RV periodically if possible to prevent flat-spotting. Use tire covers to block UV. If storing for 6+ months, consider placing the RV on jack stands to relieve tire load — flat spots on truck tires can become permanent.

7. Seal Entry Points for Pests

Mice can enter gaps as small as a dime. Stuff steel wool in any gaps around pipes, wiring, and vents. Cover roof vents and AC units with covers or mesh screens. Place rodent deterrents (dryer sheets, peppermint sachets, or commercial repellents) throughout the interior. Inspect slide-outs for gaps.

8. Retract Slide-Outs

Store with all slide-outs retracted. Extended slides put strain on seals and motors and collect debris, leaves, and moisture at the edges.

9. Cover Roof Vents and AC

Remove or cover the AC unit for the season to prevent UV damage to the shroud and keep debris out of the coils. Cover roof vents but ensure adequate ventilation to prevent condensation inside.

10. Inspect Before You Go

Walk the roof and inspect all sealants. Any cracks in caulk or sealant around vents, seams, and skylights will allow water intrusion. Reapply self-leveling sealant as needed. Catching a seam failure before storage costs $20 in sealant; catching it after six months of rain can cost $10,000 in water damage repair. Find a quality storage facility before your next storage season.

Choosing Indoor vs. Outdoor Storage

Indoor storage provides the best protection from UV, rain, and hail but costs significantly more. If your RV roof or exterior shows wear, or if you live in a region with harsh winters or severe hail storms, the premium for indoor storage is worth it. For newer RVs in mild climates, covered outdoor storage is a reasonable compromise.