How to Winterise a Caravan Properly

A split water pipe in February is a miserable way to start the touring season. If you are wondering how to winterise a caravan, the good news is that it is mostly about doing a few simple jobs thoroughly rather than buying lots of kit. Get it right before the first hard frost and you can avoid damp, flat batteries, seized components and those annoying spring surprises that cost more than they should.

How to winterise a caravan without missing the basics

For most UK owners, winterising starts with one question – are you storing the caravan on your drive, at a secure storage site or using it occasionally through winter? That changes the detail. A van left untouched for months needs a fuller shutdown, while a caravan used for the odd cold-weather break needs a routine you can reverse quickly.

Either way, water is the biggest risk. Freezing temperatures can crack pipes, taps, pumps and the toilet flush system, and even a small amount left sitting in the wrong place can cause trouble. Damp is the slow burner. It rarely announces itself dramatically, but by spring you can be dealing with stale smells, mould spots and swollen panels.

Start by choosing a dry day and giving yourself enough time to do the job properly. Rushing through it at dusk is how people forget a drain valve or leave a cushion pressed against a cold wall.

Drain down the water system fully

This is the part that matters most. Turn off the water heater and let it cool first if it has been in use. Then drain the fresh water system, open all taps in the middle position so both hot and cold sides empty, and open the drain valves. If your caravan has an onboard tank, empty that too.

The water heater needs particular attention because it can hold enough water to freeze and crack internal parts. Toilet flush tanks are another common one to miss. Check your handbook if the layout is unfamiliar, as different models place drain points and valves in different spots.

Once everything has drained, run the pump briefly if recommended by the manufacturer to clear the last of the water, but do not leave it running dry for longer than necessary. Some owners also remove the shower head and hose and lay them down so any trapped water can escape. It is a small step, but it helps.

Leave taps and valves in the right position

After draining, leave taps open in the middle position and keep drain valves open unless your manufacturer says otherwise. That gives any remaining moisture room to expand if temperatures drop sharply. It is a simple habit that can save expensive repairs.

Protect the battery, petrol and electrics

A neglected leisure battery often means replacing it sooner than expected. Cold weather does not do batteries many favours, and a battery left to discharge over winter can lose performance permanently.

If you can remove the battery and store it somewhere cool and dry, that is usually the safest option. Keep it charged with a suitable smart charger and check it periodically. If it stays in the caravan, isolate it and make sure there are no small background drains quietly flattening it over a few months.

Petrol also deserves a bit of care. Turn off petrol cylinders at the bottle, and if the caravan is going into long-term storage, many owners prefer to remove them and store them according to safety guidance. At minimum, check hoses and regulators for wear before winter sets in, rather than discovering a problem on the first spring trip.

For electrics, switch off non-essential systems and unplug portable appliances. It is also worth checking that your alarm or tracker, if fitted, is still being powered appropriately. Security matters more in storage season, but it should not come at the cost of a dead battery.

Clean first, then stop damp from moving in

A caravan put away dirty rarely comes out fresh. Crumbs attract pests, hidden spills turn musty and any existing moisture gets time to settle in. Before storage, give the interior a proper clean rather than a quick once-over.

Empty the fridge and leave the door ajar. Clean cupboards, wipe down surfaces and remove bedding if possible. Soft furnishings are fine to leave in many cases, but they should be dry and spaced so air can circulate. If your seats back onto external walls, avoid pressing cushions tightly against them all winter.

Wardrobe doors, lockers and internal doors can be left slightly open to improve airflow. The goal is not to make the caravan draughty, just to stop pockets of still, damp air building up.

Moisture absorbers can help, especially in parts of the UK where winter damp is relentless, but they are not a substitute for ventilation and dryness. If the caravan already has a condensation issue, tackle the cause rather than relying on tubs and sachets alone.

Check seals, rooflights and vents

Before the weather turns rough, inspect window seals, door seals, rooflights and external hatches. You are looking for cracks, gaps or hardened rubber that may let water in. A caravan cover can be useful in some situations, particularly if the van is exposed, but fit matters. A poor cover that traps moisture or rubs against bodywork can create its own problems.

Vents should remain clear. Blocking fixed ventilation might seem like a way to keep damp out, but it can make condensation worse and create safety issues. Caravans are designed with ventilation for a reason.

Tyres, steadies and the outside of the van

Winter storage is easier on the caravan if the exterior has been prepared as well as the inside. Start with a good wash, especially around road grime, algae and any black streaks. Dirt left sitting through winter is harder to shift later and can mark finishes.

Tyres need the correct pressure before storage. If the caravan will stand for a long period, moving it slightly from time to time can help reduce flat spots, though that depends on where it is stored and how practical that is. Some owners use axle stands, but they need to be used correctly and not as a substitute for common-sense support and site rules.

Apply the handbrake as recommended for your model and use wheel chocks if needed. Corner steadies should stabilise the caravan, not lift it. That distinction matters, especially over several months.

Locks, hinges and towing components also benefit from attention. Clean the hitch, check the breakaway cable, and lubricate moving parts with the correct products. It is a quick job that makes spring preparation much easier.

How to winterise a caravan if you still plan to use it

Some caravanners do not shut down fully because they still enjoy cold-weather weekends. In that case, winterising is less about mothballing the van and more about reducing risk between trips.

You still need to drain down whenever freezing weather is likely and the caravan will be left unused. The difference is that you may keep essentials accessible and avoid stripping everything out. Think of it as a repeatable routine – drain water, protect the battery, ventilate the interior, and check weather seals after each outing.

This is also where a few well-chosen accessories can make life easier. An effective moisture absorber, a smart battery charger, insulated towing mirror bags for storage, secure wheel locks and good-quality cleaning products all help reduce hassle. It depends how and where you store your van, but the best buys are usually the ones that prevent damage rather than the ones that just tidy things up afterwards.

Common mistakes that cost money later

Most winter problems come from small oversights. People drain the main tank but forget the toilet flush. They switch everything off but leave the battery to discharge slowly. They close the caravan tightly to keep the cold out, then trap damp inside all winter.

Another common mistake is assuming every caravan should be treated the same way. Layout, heating system, water system and storage conditions all make a difference. The handbook is not exciting reading, but for winterising it is genuinely useful.

If your caravan has had previous damp repairs, pay closer attention to seals and internal airflow. If it is stored under trees, check more often for debris around rooflights and gutters. If it is in a coastal area, exterior cleaning and metal protection matter more because salt in the air can be hard on fittings.

A quick winter check every few weeks is worthwhile if you can manage it. You are not looking to reopen the van completely, just to spot problems early – signs of water ingress, a shifted cover, tyre pressure loss or a battery that needs attention.

Putting a caravan away properly is one of those jobs that feels a bit dull on the day and very satisfying later. Spend an hour or two now, and when the first bright weekend of spring arrives, your caravan will be ready for holidays instead of repair bills.