How long does it take to winterize an RV?

Most owners can handle the water system, tires, and battery prep in about two to three hours. Add more time if you are also washing the exterior or doing a full seal inspection.

Do I still need to winterize if my RV is in a climate-controlled unit?

Yes, at least partially. Climate control helps with temperature swings and can reduce the risk of freezing, but the water system should still be drained, the battery still needs attention, and moisture control inside the cabin still matters.

How often should I check on a stored RV?

A monthly check is a good baseline: look at tire pressure, battery charge, and the interior for any sign of moisture or pests. If the RV is stored somewhere without regular staff or gate access, checking more often can catch small problems before they turn into bigger ones.

RV Winterizing Checklist: How to Prepare Your Motorhome for Storage + Free Printable

By Anytime Storage Content Team

What You’ll Learn in This Post

Why winterizing matters before parking an RV for the season
How to properly drain and protect the water system from freeze damage
Engine, battery, and tire care that prevents costly repairs later
Interior and exterior prep to guard against moisture, pests, and wear
A full quick-reference checklist organized by system

Cold weather is hard on a motorhome that sits still for months at a time. Water left in the lines can freeze and split a pipe. A battery left connected can drain to nothing. Tires can develop flat spots from bearing the same weight in the same spot for weeks on end. None of this is complicated to prevent, but it does take a plan.

Whether you are parking your Class A, Class C, or travel trailer for a few months or through the whole off-season, winterizing before storage is the difference between pulling out a rig that is ready to roll in the spring and pulling out one that needs a repair bill first. Below is a full rundown of what to check, plus a skimmable checklist you can print or save to your phone.

Why Winterizing Matters Before Long-Term Storage

An RV combines a house and a vehicle under one roof, which means it has two sets of systems that need attention before storage: the plumbing and appliances found in a home, and the engine, battery, and tires found in a car or truck. Skip one side, and you are looking at frozen pipes, a dead battery, or dry-rotted tires by the time storage season ends.

The good news is that most of this prep takes an afternoon, and a lot of it only needs to happen once per RV storage season if you choose the right storage setup.

Water System: Draining and Antifreeze

Water is the biggest risk to an RV in cold weather. A single freeze cycle can crack a pipe fitting or split a water heater tank, and you often will not know it happened until you turn the water back on in the spring and find a leak.

Drain the fresh water tank completely by opening the low-point drain valve.
Drain the gray and black tanks and flush them if you have a built-in flush system.
Open the water heater drain plug and pressure relief valve to let it empty and let air in.
Switch the water heater bypass valve so antifreeze does not fill the tank unnecessarily.
Open every faucet, hot and cold, and the outside shower, if the RV has one, to clear the lines.
Run RV-specific, non-toxic antifreeze through the lines using a water pump converter kit or by pouring it directly into the fresh tank, depending on your setup. Automotive antifreeze is not safe for a potable water system and should never be used.
Pour a small amount of antifreeze into each drain, sink, shower, and toilet to protect the P-traps.
Empty and disconnect any inline water filters before storage.

Engine, Generator, and Battery Prep

An RV that sits unused for months needs a little help so the engine, generator, and battery are in good shape when it is time to use it again.

Change the oil and filter before storage rather than after. Used oil holds contaminants that can sit in the engine and cause more wear over a long stretch of inactivity.
Fill the fuel tank most of the way and add a fuel stabilizer to keep the gas or diesel from breaking down.
Run the engine and generator for several minutes after adding stabilizer so it circulates through the system.
Check coolant and antifreeze levels in the engine, separate from the RV antifreeze used for plumbing.
Fully charge the battery before storage.
Disconnect the battery or use a battery tender or trickle charger to maintain the charge without overcharging.
If the battery stays connected, check it every few weeks and recharge as needed.

Tire Care: Preventing Flat Spots and Dry Rot

Tires that hold the same weight in the same position for weeks can develop flat spots, and prolonged sun and moisture exposure can cause cracking over time.

Inflate all tires to the pressure listed in the owner's manual, or slightly above, before storage.
Use leveling blocks or place the RV on jack stands to take weight off the tires where possible.
If jack stands are not an option, move the RV a half rotation every month or two to change where the weight sits.
Cover tires with UV-resistant tire covers if the vehicle will be exposed to direct sun.
Park on a dry, stable surface such as pavement or boards rather than bare dirt or grass, which can hold moisture against the rubber.

Interior Prep: Moisture, Pests, and Propane

The inside of the RV needs attention too, especially anything related to moisture and food.

Empty, clean, and prop open the refrigerator and freezer doors to prevent mildew odor.
Remove all food, including canned goods and anything in cabinets, to avoid attracting pests.
Turn off propane at the tank and check the lines and connections for wear.
Seal small gaps around vents, plumbing entry points, and storage compartments where rodents could get in.
Place moisture absorbers or a small dehumidifier inside to control humidity and reduce the chance of mold or mildew.
Crack roof vents slightly, with a vent cover installed, to allow some airflow, if your RV setup allows it.
Remove valuables, electronics, and anything sensitive to temperature swings.

Exterior Prep: Washing, Covering, and Seal Checks

A clean, sealed exterior holds up far better against a season of sitting than one that goes into storage dirty or with small leaks.

Wash and wax the exterior before storage so dirt and tree sap do not sit against the finish for months.
Inspect roof seams, window seals, and body seams for cracks or gaps and repair anything you find before winter weather makes it worse.
Clean gutters and awnings and retract or remove anything that could collect water or snow.
Use a breathable, properly fitted RV cover if the storage spot is uncovered or only partially covered.
Close and lock all windows, vents, and storage bay doors.

Does Your Storage Choice Change the Prep Checklist?

It does, and it is worth thinking about before you decide where to park for the season.

Outdoor storage is the most widely available and typically the most affordable option, but it leaves the RV exposed to sun, rain, snow, and wind. If this is your setup, a quality RV cover, tire covers, and a closer eye on seals and moisture control matter more.

Covered storage adds a roof over an open-air parking spot, which cuts down on direct sun and precipitation hitting the roof and exterior. It is a middle ground that reduces some prep pressure, less need for a full cover, less UV exposure on the roof, while still exposing the sides of the RV to wind and temperature swings.

Indoor storage puts the RV in an enclosed bay, which offers the most protection from weather and often from temperature swings, and adds a layer of security since the vehicle is behind walls and doors rather than parked in the open. Interior moisture control and pest-proofing still matter here, but exterior wear from sun and precipitation is far less of a concern.

None of these options replace winterizing the water system, engine, or battery. But choosing covered or indoor storage can reduce the amount of exterior upkeep needed throughout the season and make spring de-winterizing a shorter job.

Download Our Free RV Winterizing Checklist

Getting your RV ready for storage? Keep every step in one place with our printable RV Winterizing & Storage Checklist. Use it as you prepare your water system, engine, battery, tires, interior, and exterior for the off-season.

Download the Free RV Winterizing Checklist

The Right Storage Spot Makes Winterizing Easier

Winterizing protects the systems inside the RV, and where you store it protects everything else. If you are tired of re-washing a cover every few weeks or worrying about roof seals after every storm, moving to a covered or indoor spot can cut down on that maintenance considerably. Browse Anytime Storage locations near you to compare outdoor, covered, and indoor RV storage options, so you can match the level of protection to your rig, your budget, and how often you plan to use it during the season. Once you find the right fit for your RV, reserve or rent your space online!