Fibreglass vs Aluminium Caravan Repair: Why the Material Changes Everything About How It’s Fixed

Fibreglass vs Aluminium

If you’ve spent any time touring around Queensland-whether it’s storing your RV in Brisbane, experiencing coastal humidity up near the Sunshine Coast or long, corrugated inland runs-you’ve probably noticed how much punishment caravans take. From what we’re seeing in the workshop here in Sandgate on Brisbane’s northside, body damage is becoming more common, especially with newer composite vans.

One of the biggest things that catches people out? Not all caravan body repairs are the same. Fibreglass and aluminium behave completely differently, and the repair approach needs to match. Yet we still see plenty of vans coming through after being “repaired” by general panel shops that simply don’t understand caravan construction.

Main Problem

A lot of caravan owners assume a dent is a dent or a crack is a crack. But in reality, the material your van is built from completely changes:

  • how damage spreads
  • how it should be repaired
  • how strong the repair will be long-term
  • how well it will match visually

This is where things often go wrong-especially when insurance repairers or non-specialist shops treat caravans like cars.

Causes

Let’s break down the two most common caravan body materials and what typically causes damage.

Fibreglass Composite Panels

Modern vans often use full composite panels-fibreglass outer skin bonded to a structural core.

Common causes of damage:

  • Impact from tree branches or reversing incidents
  • Stress cracking from chassis flex on rough roads
  • Delamination from water ingress
  • Heat-related expansion and contraction (very common in Queensland)

Aluminium-Clad Vans

Traditional caravans use aluminium sheeting over a frame.

Common causes:

  • Stone strikes and dents
  • Minor collisions
  • Panel fatigue over time
  • Fastener movement causing rippling

Symptoms

Fibreglass Damage Signs

  • Hairline cracks in the gel coat
  • Spiderweb cracking after impact
  • Soft or “spongy” wall sections (possible delamination)
  • Discolouration or fading around repair areas

Aluminium Damage Signs

  • Visible dents or creases
  • Loose or vibrating panels
  • Rivet or screw movement
  • Oil-canning (flexing panels in heat)

Why You Shouldn’t Ignore It

We see this a lot-small cracks or dents getting ignored because they “don’t look too bad”.

Here’s the issue:

  • Fibreglass cracks can allow water into the core, leading to structural damage
  • Aluminium dents can weaken panel integrity and cause further movement
  • Poor repairs can void insurance or reduce resale value
  • Hidden damage often spreads well beyond what you can see

In Queensland conditions-heat, humidity and road vibration-these issues accelerate quickly.

How It’s Properly Diagnosed

Proper caravan body repair starts with understanding what’s happening beneath the surface.

In our workshop, that usually involves:

  • Moisture testing (especially for fibreglass panels)
  • Checking for delamination or structural separation
  • Inspecting internal framing behind aluminium panels
  • Identifying stress patterns-not just visible damage
  • Assessing whether the issue is cosmetic or structural

This step is where non-specialists often fall short. A repair might look fine on the outside but fail within months.

Repair or Upgrade Options & Cost Factors

Fibreglass Caravan Repair (Brisbane)

Fibreglass repairs are more like boat building than car panel work.

Typical process:

  • Grinding back damaged gel coat
  • Rebuilding layers of fibreglass
  • Sanding and reshaping
  • Colour-matching gel coat or paint
  • Polishing and finishing

Key challenges:

  • Colour matching is notoriously difficult, especially on older vans
  • Repairs must cure properly-Brisbane heat can affect timing
  • Structural integrity depends on correct layering techniques

Cost factors:

  • Depth of damage (surface vs structural)
  • Size of repair area
  • Colour matching complexity
  • Access to the damaged section

This is why fibreglass caravan repair in Brisbane can vary significantly in cost.

Aluminium Caravan Repair (Brisbane)

Aluminium behaves very differently-it doesn’t “blend” like fibreglass.

Typical repair options:

  • Dent removal (limited effectiveness)
  • Panel patching
  • Full panel replacement

Here’s the reality:
In many cases, replacing the panel is the only proper repair.

Key challenges:

  • Matching existing cladding profiles
  • Aligning with existing rivet lines
  • Preventing future vibration issues

Cost factors:

  • Availability of matching aluminium sheeting
  • Labour involved in removing and refitting panels
  • Structural impact behind the panel

Aluminium caravan repair in Brisbane is often more straightforward structurally-but visually, it can be harder to hide.

Preventative Advice

A lot of this damage is avoidable with a bit of awareness.

We usually recommend:

  • Regular inspections, especially after rough trips
  • Sealing and maintaining joints to prevent water ingress
  • Being mindful of tree clearance when manoeuvring
  • Checking for early signs of cracking or panel movement
  • Addressing small issues before they become structural

A common pattern we see-people wait too long, and what could’ve been a simple repair turns into a major rebuild.

Frequently Asked Questions

Q. Is fibreglass or aluminium easier to repair on a caravan?

It depends on the damage. Fibreglass can be reshaped and rebuilt, which allows seamless repairs-but it requires specialist skills. Aluminium is simpler structurally but often needs full panel replacement to look right.

Q. Why is fibreglass caravan repair more expensive?

Because it’s labour-intensive and requires layering, curing, sanding and colour matching. It’s not a quick fix-it’s a skilled process.

Q. Can caravan panel beaters repair fibreglass vans?

Not always properly. Traditional panel beaters are trained for metal, not composite materials. This is where a lot of poor repairs come from.

Q. How do I know if my caravan has structural damage?

Signs include soft walls, internal movement, recurring cracks or water ingress. A proper inspection is the only way to be sure.

Q. Will insurance cover caravan body repairs?

Most policies do-but the quality of repair depends heavily on the repairer. Not all insurance-approved shops specialise in caravans.

Q. Can aluminium caravan dents be removed without replacing the panel?

Sometimes-but results are limited. Creased or stretched aluminium usually requires replacement for a proper finish.

Q. Does Queensland heat affect caravan repairs?

Absolutely. Heat impacts expansion, curing times (for fibreglass), and long-term durability. Repairs need to account for local conditions.

On A Final Note

From what we see every day in the workshop, the biggest mistake caravan owners make is assuming all body repairs are the same.

They’re not.

Fibreglass and aluminium require completely different approaches, tools and experience. Getting it wrong doesn’t just affect how your van looks-it affects how it performs, how long it lasts, and whether problems come back.

If there’s one thing we’d suggest, it’s this: get the right diagnosis early, and make sure whoever is repairing your van understands caravan construction-not just automotive panels.

That’s the difference between a repair that lasts… and one that doesn’t.

📞 Call us: 07 38692969
📍 Visit us: 101 Connaught Street, Sandgate Qld 4017
📧 Email: [email protected]

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Todd McArthur

Todd McArthur is CEO of AllBrand Caravan Services and Managing Director of McArthur Industries in Brisbane, with over 30 years of experience in the caravan and automotive industry.