Complete Motorhome Winterisation Guide
Everything you need to do to prepare your motorhome for winter storage — a complete checklist.
What This Is
Proper winterisation protects your motorhome from frost damage, damp, rodents, and battery deterioration during the months it is not in use. This comprehensive guide covers every system.
Tools & Parts Required
- Compressed air or tyre inflator with blow-gun
- Battery conditioner/maintainer
- Breathable motorhome cover (optional)
- Rodent repellent
- Tyre cradles (optional)
Step-by-Step Instructions
- 1
WATER SYSTEM: Drain the fresh water tank, all pipes, and the hot water boiler. Open all taps. Run the pump dry briefly then switch off. Pour antifreeze into traps. See the dedicated Winterising Water System guide for full details.
- 2
GAS SYSTEM: Turn off the gas at the bottle. Leave all appliance controls in the off position. Do not leave gas in the pipes over winter.
- 3
BATTERY: Connect the leisure battery to a smart battery conditioner/maintainer. This keeps it at optimal charge without overcharging. Alternatively, remove the battery and store it in a frost-free location on a maintainer.
- 4
FRIDGE: Empty, clean, and switch off the fridge. Leave the door slightly ajar to prevent mould and odours. Place an open box of bicarbonate of soda inside to absorb any remaining smells.
- 5
TYRES: Inflate to the maximum recommended pressure for storage. If storing for more than 3 months, use tyre cradles to prevent flat spots. Move the vehicle slightly every 4–6 weeks if possible.
- 6
VENTILATION: Leave roof vents slightly open (use vent covers to keep rain out) to allow air circulation and prevent condensation and mould.
- 7
RODENTS: Place rodent repellent sachets or ultrasonic deterrents inside. Block any obvious entry points with wire wool. Check the engine bay for nesting.
- 8
EXTERIOR: Wash and wax the exterior. Apply a UV protectant to rubber seals. If using a cover, ensure it is breathable — a non-breathable cover traps moisture and causes more damage than no cover.
- 9
DOCUMENTATION: Record the date, mileage, and any outstanding issues. Schedule a service for spring. Note the date of the next habitation check.
Common Mistakes to Avoid
- Forgetting to drain the hot water boiler — the most expensive frost damage.
- Using a non-breathable cover — this traps moisture and causes damp.
- Leaving the battery connected without a maintainer — it will self-discharge and sulphate.
- Leaving food in cupboards — this attracts rodents.
Safety Warnings
- Ensure all gas is turned off at the bottle before storage.
- Do not store petrol or diesel containers inside the vehicle.
When to Call a Professional
If you discover any damp, structural damage, or gas system concerns during winterisation, have them assessed before spring to avoid problems at the start of the season.
Community Tips
Real-world tips from motorhome and caravan owners
No tips yet — be the first to share a tip!
Have a tip to share?
Sign in to contribute your own real-world experience