Damp and condensation are common issues in caravans, especially during colder months. Left unchecked, they can lead to mould, musty smells, and even structural damage. Whether you use your caravan year-round or store it over winter, keeping it dry is essential. Here’s how to prevent damp and condensation in your caravan.

1. The Dangers of Damp and Mould in Your Caravan
Ignoring damp and mould can cause serious problems for both your caravan and your health. Here’s why it’s crucial to address these issues quickly:
- Structural Damage – Damp can weaken wood panels, flooring, and insulation, leading to costly repairs.
- Health Risks – Mould spores can trigger respiratory problems, allergies, and other health issues, especially for those with asthma.
- Electrical Hazards – Excess moisture can damage wiring and electrical components, increasing the risk of short circuits.
- Unpleasant Odours – Damp and mould create a musty smell that’s difficult to remove and can make your caravan uncomfortable.
Now that you know the risks, let’s look at how to prevent damp and condensation from becoming a problem.
2. Improve Ventilation
Poor airflow is a major cause of condensation. When warm air inside your caravan meets cold surfaces, moisture builds up, leading to damp problems.
- Keep roof vents and windows slightly open when cooking, showering, or using a heater.
- Use window trickle vents if your caravan has them.
- Avoid blocking air vents with furniture or storage items.
- When storing your caravan, leave cupboard doors slightly open to allow air circulation.

3. Use a Dehumidifier or Moisture Absorbers
To reduce excess moisture, especially in winter:
- Use a portable dehumidifier when your caravan is occupied.
- Place moisture absorber pots (such as silica gel or calcium chloride-based products) in cupboards, under beds, and in corners.
- Change moisture absorbers regularly to keep them effective.
4. Maintain Heating and Temperature Control
Keeping your caravan at a stable temperature helps prevent condensation from forming.
- Use low-level heating (such as an oil-filled radiator or fan heater) if storing your caravan in winter.
- Avoid using gas heaters without proper ventilation, as they produce moisture.
- If possible, store your caravan in a covered or insulated space to prevent extreme temperature fluctuations.
5. Manage Moisture from Daily Activities
Everyday activities like cooking and showering release moisture into the air. Here’s how to reduce it:
- Cook with lids on pots to reduce steam.
- Always use an extractor fan or open a window when showering or cooking.
- Dry wet clothes outside rather than inside the caravan.

6. Check for Leaks and Seal Gaps
Leaks are a leading cause of damp in caravans. Regular inspections can help catch problems early.
- Check seals around windows, doors, and rooflights for cracks or gaps.
- Inspect external panels and joints for signs of water ingress.
- Look for soft spots on walls or ceilings, which may indicate hidden damp
- Reseal any gaps with a caravan-friendly sealant if needed.
7. Use Breathable Covers When Storing Your Caravan
If storing your caravan outside for long periods:
- Use a breathable cover to prevent water build-up while allowing airflow.
- Avoid completely sealing the caravan, as this can trap moisture inside.
8. Regularly Inspect and Clean
Routine maintenance goes a long way in preventing damp problems.
- Check behind furniture and under beds for any hidden moisture or mould.
- Wipe down windows and walls regularly to remove condensation.
- If you spot early signs of mould, clean with a mild vinegar or specialist caravan cleaner.
Preventing damp and condensation in your caravan is all about ventilation, temperature control, and regular maintenance. By following these simple steps, you can keep your caravan dry, comfortable, and free from costly damp issues.
If you suspect damp or need professional repairs, Thomas Auto Tec can help. Our workshop specializes in caravan repairs and maintenance, including damp checks and resealing. Get in touch today to keep your caravan or motorhome in top condition!