Roof Tent Maintenance Guide UK: Cleaning, Mould & Storage

Why Roof Tent Maintenance Matters

A roof tent is exposed to more than the conditions at a campsite. While driving, it can encounter rain, spray, road salt, dust, insects, strong sunlight, vibration and repeated heating and cooling. When occupied, the inside also has to deal with moisture from breathing, damp clothing, wet equipment and temperature changes.

Good maintenance can help to:

• reduce mould, mildew and musty smells;
• preserve the tent’s water-repellent performance;
• keep zips, hinges, locks and ladders working correctly;
• protect the mattress and tent base;
• identify loose or corroded mounting hardware;
• avoid damage to the roof tent, roof bars or vehicle;
• extend the useful life of the tent;
• protect resale value.

Maintenance is also a safety issue. A loose clamp, distorted roof bar, damaged ladder or failing opening mechanism should never be ignored.

Before fitting or maintaining any roof tent, make sure the complete setup is suitable for your vehicle. Our roof tent vehicle compatibility guide explains the checks, while the Complete Roof Tent Buying Guide UK covers roof loads, tent types and buying decisions in more detail.

Practical Roof Tent Maintenance Schedule

The following schedule is a useful general starting point. A tent used every weekend, left on the vehicle all year or regularly driven on rough roads may need more frequent attention.

The Five-Minute Check Before Every Journey

Before driving with a roof tent fitted, walk around the vehicle and complete a brief visual and physical inspection.

Confirm that:

• the tent is fully closed;
• the hard shell or travel cover is correctly secured;
• no fabric is trapped outside the closed tent;
• all straps, latches and locks are fastened;
• the ladder is secured in its travel position;
• no loose accessories remain attached;
• the tent has not moved on the roof bars;
• the roof bars or rack remain secure;
• all visible mounting hardware is present;
• you know the vehicle’s total height.

Give the closed tent a controlled push from the front, rear and sides. There should not be unexpected movement between the tent, mounting system and roof bars.

TentBox’s Classic installation guidance, for example, tells owners to check that the fixing clamps are adequately tightened and to test for movement after mounting.

Do not simply tighten every fixing as hard as possible. Excessive force can damage hardware, deform roof bars or put inappropriate pressure on mounting components. Use the manufacturer’s specified torque where one is provided.

How to Dry a Wet Roof Tent Properly

A roof tent will sometimes need to be closed while damp. You may have to leave a campsite in rain, move the vehicle or pack away before the weather improves.

Packing the tent damp for the journey home is not necessarily the main problem. Leaving it closed and wet afterwards is.

What to do after packing away in rain

1. Park somewhere suitable as soon as practical.
2. Open the roof tent fully.
3. Remove wet bedding and clothing.
4. Lift or remove the mattress if the design permits.
5. Open doors, windows and ventilation panels.
6. Wipe away standing water.
7. Allow the fabric and internal surfaces to dry.
8. Check beneath the mattress and anti-condensation mat.
9. Inspect fabric folds, seams, hinges and the travel cover.
10. Close the tent only when everything is dry.

Do not assume that the tent is dry because the visible canvas feels dry. Moisture can remain beneath the mattress, inside fabric folds, around seams, in the base panel, behind insulation liners and inside bedding.

TentBox’s published FAQs advise drying the tent fully before it is packed away for more than a short period to help prevent mould and mildew.

Can a roof tent be dried during winter?

Yes, although it may take longer. Choose a dry, breezy period where possible, remove bedding and increase ventilation. If the tent can be opened safely in a suitable garage, a dehumidifier may help.

Avoid directing intense heat at tent fabric, clear windows, adhesives, foam or waterproof coatings. Never use unattended heaters or drying equipment that creates a fire risk.

Roof Tent Condensation: Causes and Prevention

Condensation does not automatically mean the roof tent is leaking. Warm, moisture-laden air inside the tent can meet a colder surface and form droplets.

Condensation is more likely when:

• two or more people sleep inside;
• the weather is cold;
• ventilation is limited;
• wet clothes or footwear are brought inside;
• bedding touches cold tent walls;
• the air is naturally humid;
• airflow beneath the mattress is restricted.

iKamper’s condensation guidance recommends ventilation, wiping down moisture and airing the tent before closing it.

How to reduce condensation

• Keep ventilation openings partly open when conditions allow.
• Use mesh-covered openings to maintain airflow while limiting insects.
• Avoid storing wet coats, boots and towels in the sleeping area.
• Do not block built-in vents.
• Leave space between bedding and cold tent walls.
• Wipe visible moisture away each morning.
• Lift and air the mattress after each damp or cold trip.
• Consider a compatible anti-condensation mat.
• Dry the tent completely after returning home.

Anti-condensation mats

An anti-condensation mat creates an airflow space beneath the mattress. It may reduce moisture accumulation, but it does not eliminate the need for ventilation and drying.

Lift the mat periodically because moisture and dirt can still collect underneath. Make sure any mat is compatible with the tent’s closing clearance, mattress and base material.

How to tell condensation from a leak

If testing for a leak, use gentle water flow rather than a pressure washer. Photograph the suspected fault before attempting repairs, particularly if the tent may still be under warranty.

How to Clean Roof Tent Fabric Safely

Roof tent fabric should normally be cleaned gently.

Before cleaning:

• read the manufacturer’s care instructions;
• remove loose dirt with a soft brush or vacuum;
• test any product on an inconspicuous area;
• avoid cleaning in intense direct sunlight;
• make sure the tent can remain open until completely dry.

Basic fabric-cleaning method

1. Open the tent fully.
2. Shake out or vacuum loose dirt.
3. Allow wet mud to dry before brushing it away carefully.
4. Use lukewarm water and an approved mild cleaner.
5. Apply using a soft cloth, sponge or soft brush.
6. Work gently rather than scrubbing aggressively.
7. Rinse away cleaner residue where required.
8. Allow the tent to dry fully before closing.

Thule’s roof-tent care guidance advises cleaning with water and ordinary washing liquid that does not contain alcohol, bleach or ammonium additives. Always check the instructions for your exact model because materials differ.

Products to avoid unless specifically approved

• bleach;
• strong mould remover;
• solvents;
• alcohol-based cleaners;
• aggressive detergents;
• pressure washers;
• wire brushes;
• steam cleaners;
• abrasive pads.

Unsuitable products may damage waterproof coatings, clear windows, adhesives, stitching or fabric colour.

Bird droppings, insects, tree sap and salt

Bird droppings: soften the deposit with lukewarm water before wiping it away. Do not scrape dry contamination from fabric or painted shells.

Insects: use water and a soft cloth. An approved vehicle or tent cleaner may be appropriate for some hard shells.

Tree sap: ask the manufacturer which product is safe. Do not experiment with solvents.

Coastal salt: rinse suitable exposed surfaces and metal components with fresh water where permitted, then dry them thoroughly.

Hard-Shell Roof Tent Maintenance

A hard-shell tent requires care both inside and outside. Shells may be made from ABS plastic, fibreglass, aluminium, composite material or painted metal.

A typical cleaning process is:

1. Rinse away loose grit.
2. Wash using a soft cloth or sponge.
3. Use a mild product approved for the shell.
4. Rinse thoroughly.
5. Dry using a clean, soft cloth.
6. Inspect for cracks, distortion, chips, loose fittings and damaged seals.

Do not use an automatic car wash with a roof tent fitted unless the vehicle manufacturer, tent manufacturer and wash operator all permit it. Height restrictions, brushes and wash rails can create obvious risks.

Some manufacturers recommend waxing particular glossy shells, but this is not universal. Only use polish, wax or coatings approved for your shell material.

Aluminium-shell inspections

• coating damage;
• corrosion around dissimilar metals;
• loose accessory rails;
• damaged seals;
• blocked drainage channels;
• dents or sharp edges.

Soft-Shell Roof Tent Maintenance

A soft-shell tent normally has more exposed fabric, folds, webbing and a travel cover.

Pay particular attention to:

• the underside of the travel cover;
• folds in the fabric;
• zipped corners;
• hook-and-loop fasteners;
• ladder hinges;
• annex attachment points;
• support-pole sleeves;
• webbing straps;
• the base perimeter.

Inspect the cover for splits, damaged zips, worn straps, loose stitching and places where it is rubbing against hardware.

When closing the tent, tuck the fabric carefully so it is not caught beneath the cover, trapped in a hinge or left exposed to airflow while driving. TentBox’s Lite installation guide specifically reminds owners to tuck the fabric in thoroughly before fitting the travel cover.

Reproofing Roof Tent Fabric

Reproofing restores or supports the water-repellent finish on the outer fabric. It is not a substitute for repairing holes, failed seams or damaged construction.

Possible signs that reproofing may be needed include:

• water no longer beads on the fabric;
• the outer fabric wets out quickly;
• drying takes noticeably longer;
• water repellency becomes uneven;
• the manufacturer’s recommended interval has been reached.

Before applying any treatment, confirm:

• the recommended product;
• whether the fabric should be wet or dry;
• whether clear windows and zips need masking;
• the required curing period;
• whether seams need a separate product;
• whether the treatment affects warranty conditions.

General reproofing process

1. Clean the tent first.
2. Prepare the fabric as directed by the product.
3. Protect clear windows, hardware and nearby surfaces.
4. Apply the treatment evenly.
5. Remove excess product or drips.
6. Allow it to cure fully.
7. Test using clean water after curing.
8. Dry completely before packing away.

Never combine chemical products unless their manufacturers confirm compatibility.

Does a new roof tent need weathering?

Some traditional canvas products are weathered before first use by wetting and drying the fabric. Whether this is appropriate for a modern roof tent depends on its material and construction.

Do not soak a new roof tent automatically. Follow the model-specific instructions.

Roof Tent Mould and Mildew

Mould normally develops when moisture, dirt and limited airflow remain together long enough.

Signs can include:

• black, green, grey or white spotting;
• a musty smell;
• staining beneath the mattress;
• marks around seams;
• discolouration on bedding or liners.

How to prevent mould

• Dry the tent after every wet trip.
• Remove damp bedding.
• Lift and air the mattress.
• Keep the fabric and base clean.
• Provide appropriate airflow during storage.
• Do not store the tent in a damp room.
• Deal with condensation promptly.

What to do if mould appears

1. Move the tent to a well-ventilated area.
2. Use appropriate personal protective equipment.
3. Separate affected bedding and removable components.
4. Photograph the contamination.
5. Check the manufacturer’s cleaning guidance.
6. Use only a treatment compatible with the material.
7. Test a small area first.
8. Dry everything completely.
9. Identify why moisture remained.

Severe mould may penetrate foam, wood-based panels, fabric and adhesives. Professional cleaning or replacement components may be more appropriate than repeated chemical treatment.

Do not apply strong bleach indiscriminately. It can damage fabric colour and waterproof coatings.

Roof Tent Mattress and Bedding Care

The mattress is one of the easiest areas to overlook. Moisture may collect underneath it even when the sleeping surface feels dry.

After damp or cold-weather trips:

• remove all bedding;
• lift the mattress;
• inspect both sides;
• inspect the tent base;
• dry condensation;
• air the mattress separately if permitted;
• check for mould, compression or odour.

Use the mattress manufacturer’s cleaning instructions. Some covers are removable, while others should only be spot-cleaned. Avoid soaking foam because internal moisture may remain after the surface feels dry.

A mattress topper or bulky bedding can prevent a roof tent from closing correctly. Too much internal pressure may strain latches, hinges, shells, windows or seams. Follow the model’s stated bedding-storage limits.

Zips, Mesh, Seams, Ladder and Opening Mechanisms

Zip maintenance

• Brush away dirt, grit and sand.
• Keep fabric clear of the slider.
• Do not force a jammed zip.
• Support tensioned fabric while closing.
• Inspect the stitching around the zip.
• Use only an approved zip lubricant.

If a zip jams, first check for trapped fabric, grit, uneven tension or slider misalignment.

Clear windows and insect mesh

Clean clear windows using water, a very soft cloth and an approved cleaner where permitted. Avoid paper towels, abrasive cloths and ordinary household glass cleaner unless approved.

Inspect insect mesh for tears, detached edges, damaged zips and stretched corners. Repair small faults before they spread.

Seams and stitching

Inspect seams in good daylight for loose thread, stretched stitch holes, worn seam tape, small tears, abrasion and water marks. Do not pull loose thread. Photograph the fault and seek suitable repair advice.

Ladder maintenance

Before use, inspect:

• rungs;
• telescopic locks;
• hinges and rivets;
• feet;
• mounting points;
• extension sections;
• bending, cracking or corrosion.

Make sure each section is locked, the ladder angle follows the manufacturer’s guidance and the feet are on stable ground. Clean grit from telescopic sections carefully.

Do not apply oil or grease unless instructed. Some products attract dirt or make components unsafe to handle.

Hinges, gas struts and powered mechanisms

Inspect opening systems for corrosion, bending, loose fixings, unusual noise, unequal movement, oil leakage, weakened support, trapped fabric and damaged wiring.

Do not dismantle gas struts or tensioned mechanisms casually. Stored energy can make them hazardous. If a shell opens unevenly or will no longer remain supported, stop using it until assessed.

Mounting Brackets, Roof Bars and Vehicle Roof

The tent can only be as secure as the structure supporting it.

Mounting brackets and fixings

Inspect:

• clamps;
• nuts and bolts;
• mounting channels;
• plates and security fasteners;
• corrosion;
• elongated holes;
• cracks;
• polished or scratched witness marks showing movement.

Use replacement hardware of the correct grade, size, thread, coating and specification. An ordinary bolt that physically fits is not automatically a suitable safety-critical replacement.

Roof bars and racks

Inspect roof-bar feet, locks, clamps, end caps, crossbars, platform rails, tracks, fixed points and vehicle roof rails.

Follow the roof-bar manufacturer’s retightening schedule and load limits. Check the combined weight of the tent, roof bars, mounting hardware and any accessories. The Complete Roof Tent Buying Guide explains why the entire travelling load matters, not only the advertised tent weight.

For broader compatibility checks, use our Can You Put a Roof Tent on Any Car? guide before assuming that a physically mountable setup is suitable.

Vehicle roof and paintwork

Where practical, periodically remove or lift the tent so concealed areas can be inspected.

Check:

• roof-bar feet and rail contact areas;
• paintwork for rubbing or trapped grit;
• roof channels and seals;
• fixed mounting points;
• corrosion;
• trapped leaves and debris;
• standing water.

Do not place improvised foam, cloth or rubber beneath mounting feet unless the roof-bar manufacturer approves it, as this may affect clamping security.

Leaving a Roof Tent on the Car All Year

Some tents can remain fitted throughout the year, but permanent installation increases exposure to road salt, UV light, rain, frost, wind loading, height restrictions and security risks.

If the tent remains fitted through winter:

• wash away road salt;
• inspect the fixings more frequently;
• air the interior during suitable weather;
• check beneath the mattress;
• keep drainage channels clear;
• inspect shell seals and the travel cover;
• do not leave bedding inside for months without inspection.

Also check your insurer’s requirements. Our buying guide explains why a roof tent, roof rack or permanent roof-bar setup may need to be declared.

Removing and Storing a Roof Tent

Roof tents are heavy and awkward. Use the number of people, lifting equipment and procedures specified by the manufacturer.

Before removal

1. Empty the tent.
2. Remove loose accessories.
3. Close and secure it.
4. Disconnect electrical equipment safely.
5. Mark mounting positions where useful.
6. Prepare the storage area.
7. Plan the lifting route.

Never stand beneath an inadequately supported suspended tent. Store mounting hardware in labelled containers.

Correct storage position

Storage orientation varies. Some models may be stored on their side with suitable protection, while others should be kept flat or on a purpose-made trolley. Follow the instructions for the exact tent.

A suitable storage space should be:

• dry and reasonably ventilated;
• secure;
• protected from rodents;
• out of direct sunlight;
• away from standing water and chemicals;
• structurally capable of supporting the tent.

Before storage, clean and dry the tent, remove food and bedding, inspect for damage and protect it from direct floor contact as instructed. Avoid wrapping a damp tent in impermeable plastic.

Winter storage checklist

• Clean the outer shell or travel cover.
• Clean and dry the fabric.
• Remove bedding and personal belongings.
• Inspect the mattress on both sides.
• Check for mould or musty smells.
• Inspect seams, zips and mesh.
• Check ladder locks and feet.
• Inspect hinges and gas struts.
• Clean mounting rails and brackets.
• Record any parts that require replacement.
• Store all fixings securely.
• Use the manufacturer-approved storage position.

When buying second-hand, storage history matters. Use our Used Roof Tents Guide UK to inspect fabric, mattresses, mounting hardware, shells and ladders before purchase.

Maintenance After Coastal, Winter and Off-Road Use

After coastal camping

• Remove sand from zips, tracks and ladder sections.
• Rinse suitable exposed components with fresh water.
• Inspect fasteners, hinges and aluminium parts for corrosion.
• Dry the travel cover and fabric.
• Air the mattress.

After winter camping

• Remove wet bedding immediately.
• Lift and dry the mattress.
• Dry condensation from internal surfaces.
• Inspect insulation liners.
• Dry annexes and thermal liners separately.
• Check zips and mechanisms for trapped moisture or ice damage.

After rough-road or off-road use

• Inspect mounting clamps and roof-bar feet.
• Look for shell, base or fabric impact damage.
• Clean grit from hinges and ladder sections.
• Check wiring and attached accessories.
• Test for movement between the tent and support system.

The vehicle, roof rack and roof tent may each have different rough-road restrictions. The most restrictive instruction should be treated seriously.

Common Roof Tent Maintenance Mistakes

Leaving the tent packed away wet

This is one of the quickest ways to create mould, staining and odour.

Using strong household chemicals

A cleaner intended for kitchens or bathrooms may damage fabric coatings, clear windows, stitching and adhesives.

Ignoring moisture beneath the mattress

The top of the mattress can feel dry while condensation remains underneath.

Overtightening fittings

More force is not always safer. Follow the correct torque and fitting procedure.

Never checking the roof bars

Roof tent maintenance includes the complete support system.

Closing the tent over trapped fabric

This can damage seams, shells, travel covers, hinges and waterproofing.

Carrying too much bedding inside

Excess internal pressure can prevent correct closure and overload latches.

Using unsuitable lubricant

Some lubricants attract grit, damage plastics or contaminate fabric.

Using improvised safety-critical parts

Ladder, hinge, gas-strut and mounting replacements should match the manufacturer’s specification.

Ignoring small tears or corrosion

Minor faults are usually easier and cheaper to address before they spread.

When Should a Roof Tent Be Professionally Inspected?

Stop using the tent and seek suitable advice if you find:

• cracks in a structural shell or base;
• bent mounting rails;
• significant corrosion around structural components;
• damaged ladder mounts;
• loose or distorted hinges;
• failing gas struts;
• repeated water entry;
• severe mould contamination;
• damaged wiring;
• movement between the tent and roof bars;
• distorted roof bars or vehicle rails;
• damage after a collision, branch strike or height-barrier impact.

Suggested Roof Tent Maintenance Kit

• soft cleaning cloths;
• soft brush;
• small vacuum;
• microfibre towels;
• approved mild cleaner;
• manufacturer-approved reproofing product;
• zip-cleaning brush;
• approved lubricant where specified;
• torque wrench and correct sockets where required;
• approved spare fasteners;
• compatible fabric-repair materials;
• a written or digital maintenance record.

Roof Tent Maintenance Record

Recording maintenance can help identify recurring faults and may be useful for resale or warranty discussions.

Roof Tent Maintenance Frequently Asked Questions

How often should I clean a roof tent?

Clean it whenever mud, salt, bird droppings, tree debris or other contamination builds up. A deeper clean at the beginning or end of the camping season is sensible, but usage matters more than a fixed calendar interval.

Can I pack away a roof tent when it is wet?

You may occasionally need to close it wet to travel home, but reopen and dry it as soon as reasonably practical.

How long can a roof tent remain packed wet?

There is no universal safe period because temperature, material, dirt and ventilation all affect mould growth. Treat wet packing as temporary.

Can I pressure-wash a roof tent?

Generally, this is not advisable unless the manufacturer explicitly permits it. High-pressure water can damage coatings, seams, seals and windows.

Can I use washing-up liquid?

Some manufacturers permit a mild washing solution, while others specify dedicated products. Check the instructions for the particular tent.

Can I use bleach to remove mould?

Do not use bleach unless the manufacturer specifically approves it. Bleach may damage fabric colour and waterproof coatings.

How do I prevent mould beneath the mattress?

Ventilate the tent, lift the mattress after use, dry condensation and consider a compatible anti-condensation mat.

Why is the underside of the mattress wet?

Warm internal air can condense against the cooler tent base, particularly where airflow is limited.

Does condensation mean the roof tent leaks?

Not necessarily. Condensation tends to be spread across colder surfaces, while a leak often follows a repeatable entry point.

How often should roof tent fabric be reproofed?

Follow the tent manufacturer’s guidance. Exposure, use and fabric type all affect the interval.

Can I use any tent waterproofing spray?

No. Confirm that the product is compatible with the roof tent fabric and its original coating.

Should roof tent zips be lubricated?

Only with a zip product approved by the manufacturer. Ordinary oils may attract dirt or damage surrounding materials.

Should telescopic ladder sections be lubricated?

Do not apply lubricant unless instructed. It may attract grit or make components slippery.

Can a hard-shell roof tent be polished?

Some shell materials may be polished or waxed, while others require different care. Check the manufacturer’s instructions.

Can I take a vehicle with a roof tent through a car wash?

It is usually safer to avoid automatic car washes unless the vehicle, tent and wash operator all explicitly permit it.

How often should roof tent mounting bolts be checked?

Follow the tent and roof-bar manufacturers’ schedules. Check after fitting, before trips, after rough-road use and whenever movement or noise is suspected.

Should mounting bolts be tightened as hard as possible?

No. Overtightening can damage hardware and roof bars. Use the specified torque and procedure.

Can I leave a roof tent fitted all year?

Some models can remain fitted, but year-round exposure increases weathering and corrosion risks. Inspect and clean the setup more frequently.

Can a roof tent be stored on its side?

Only if the manufacturer permits it. Correct storage orientation depends on the design.

Should I remove the mattress for winter storage?

Removing or separately airing the mattress may help, but follow the manufacturer’s guidance.

Can small fabric tears be repaired?

Many minor tears can be repaired using compatible materials. Damage near structural seams or mounting points needs specialist advice.

What should I do if the tent moves on the roof bars?

Stop driving when safe and inspect the complete mounting system. Do not continue until the cause has been corrected.

A Simple Roof Tent Maintenance Routine

1. Check the tent and mounting system before driving.
2. Ventilate the tent while occupied.
3. Remove dirt and moisture after use.
4. Dry it fully after every wet trip.
5. Inspect beneath the mattress.
6. Clean using approved products.
7. Repair small faults promptly.
8. Complete a deeper seasonal inspection.
9. Store the tent exactly as the manufacturer recommends.

The most expensive maintenance problems often begin with small, avoidable issues: moisture left beneath a mattress, a loose clamp, trapped fabric, corrosion or a minor tear that was never addressed.

Compare Roof Tents with Maintenance in Mind

Maintenance requirements should be considered before buying, not only after the tent is fitted.

Compare:

• shell and fabric construction;
• ease of drying;
• mattress ventilation;
• access to mounting hardware;
• availability of replacement parts;
• removable covers;
• UK warranty support;
• storage requirements;
• manufacturer maintenance guidance.

A tent that is easy to clean, inspect and repair may be a better long-term purchase than one chosen only for appearance or opening speed.

Use the UK roof tent comparison tool to compare available models by price, weight, size, sleeping capacity and other important specifications.

Help Us Improve This Guide

CarRoofTents.co.uk is being developed as an independent UK roof tent research and comparison resource.

This guide can be expanded with real-world maintenance photographs, manufacturer-specific schedules, owner experiences, long-term tests, cleaning-product comparisons, mould-removal case studies, repair demonstrations and replacement-parts information.

Researched guidance, owner contributions and future hands-on testing should always be identified clearly so readers understand the source of the advice.