RoamCare field notes · 5 October 2026
Can you pressure wash a caravan? A safer NZ spring-cleaning guide
Before pressure washing a caravan, check this safer NZ guide to seals, vents, acrylic windows, roof access and manufacturer instructions.
The short answer: usually not on the caravan body or roof
Do not assume a pressure washer is suitable for a caravan just because it works on a car or driveway. Several current caravan handbooks specifically warn against using high pressure on exterior panels, roofs, seals or openings. Start with the instructions for your exact make, model and fitted components. If those instructions do not clearly permit pressure washing, use a controlled low-pressure wash instead.
Why high pressure can create an expensive problem
A caravan has rooflights, windows, vents, doors, service hatches, trim and sealed joints across a relatively small exterior. Swift's current 2026 touring-caravan handbook says not to use a high-pressure washer because it can permanently damage caravan seals. Coachman's 2026 handbook similarly warns that pressure washing can disturb mastic seals.
One instruction does not apply to every surface
The correct method can change across different parts of the same caravan. Bailey's 2025 caravan manual includes pressure-washing guidance for the galvanised chassis in specific circumstances, but warns owners not to pressure wash the sides or roof because water could enter through rooflights, windows and fridge vents. That is why a chassis instruction should never be treated as permission to pressure wash the whole caravan.
A gentler spring-cleaning method
Work in a cool, suitable area and confirm that windows, rooflights, doors and hatches are properly closed. First use a gentle flow of clean water to shift loose grit. Wash compatible exterior surfaces with clean, soft, non-abrasive equipment and only a mild product approved by the caravan manufacturer. Rinse with controlled water and dry with a clean microfibre cloth if the manual recommends it. Do not direct water into vents, openings, cable entries or sealed joints.
Treat acrylic windows as a separate job
Acrylic caravan windows scratch more easily than household glass. Remove loose dirt before wiping, keep window tools separate from brushes or cloths used on gritty bodywork, and use only a cleaner confirmed as compatible. Swift's handbook advises washing surface dirt and film away before rubbing the window and keeping drying cloths clean and free from grit. RoamCare's acrylic caravan-window guide covers this surface in more detail.
Avoid solving dirt with stronger chemicals
More cleaning power is not always safer. Swift cautions against acid- or alkaline-based cleaners, solvents and abrasive agents on exterior panels, while Coachman recommends mild, near-neutral cleaning and warns against harsh or abrasive products. The exact approved product still depends on your caravan's materials and warranty guidance, so check the manual or dealer before treating sap, mould, road film or stubborn bird droppings.
Keep the clean at ground level
Do not turn exterior cleaning into a roof or ladder risk. A caravan roof should not be assumed to be walkable, and RoamCare's standard service does not include roof walking. WorkSafe New Zealand's ladder guidance notes that ladders do not provide fall protection and recommends eliminating work at height where possible. If a surface cannot be reached safely from an approved position, stop and arrange suitable help.
Inspect after washing, but keep cleaning separate from repairs
Once the exterior is dry, look from a safe position for lifted sealant, cracks, staining, loose trim or signs that water has reached somewhere it should not. Photograph anything unusual. Do not probe seals, dismantle fittings or apply a quick sealant over an unknown leak. Water-ingress, structural, electrical, gas and roof repairs need the appropriate caravan specialist or qualified trade.
Where RoamCare can help
RoamCare provides gentle caravan exterior, solar-panel, window and awning care without pressure washing or roof walking. Every job is checked against safe access, weather and the instructions for the customer's equipment. You can view RoamCare's New Zealand coverage or request route-matched service around Christchurch, Ashburton, Rangiora and other open locations.
The practical takeaway
For caravan sides and roofs, a pressure washer is usually the wrong default. Read the exact handbook, separate chassis guidance from bodywork guidance, and use the least aggressive compatible method. A careful low-pressure clean takes longer, but it avoids forcing water and cleaning products into places the manufacturer did not intend.
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