How a Split Seal Could Cost You $10,000+ in Caravan Repairs

Grant Smith 02/10/2025 0 comments

When it comes to caravan maintenance, one of the most overlooked – yet most critical – tasks is checking the seals around your van. The silicone, foam, or rubber seals around windows, lights, electrical fittings, and J-moulds aren’t just cosmetic. They’re your first line of defence against water intrusion – and when they fail, the results can be devastating.

Why Seals Matter

Caravans are designed with lightweight cladding, often aluminium, fixed over a timber frame. When a seal separates from the body – even by just a few millimetres – water can find its way inside. And water doesn’t need much of an invitation. Once it seeps in, it begins rotting the timber structure hidden behind the cladding.

Left unnoticed, this leads to soft spots in the walls, bubbling in the interior panels, mould growth, and eventually structural damage. Repairs for water ingress often run into the tens of thousands of dollars, far exceeding the cost of prevention.

Where to Check

At least three to four times a year, take the time to walk around your caravan and carefully inspect:

Windows – look closely at the silicone or foam seals around frames.

Light fittings – external lights and reflectors can separate easily.

Electrical fittings – outlets and external plugs are vulnerable points.

J-moulds and corner moulds – where panels join, these areas flex with travel and can create gaps.

Don’t just look – run your finger along the seals, feeling for cracks, gaps, or lifting. If you see discolouration, bubbling, or staining near a seal, that’s often a sign water has already gotten in.

How Often Should You Inspect?

A good rule of thumb is every three to four months, or before and after a long trip. Caravans flex and move during travel, and seals that were fine last season may not be fine today. Regular checks and small resealing jobs can save you from catastrophic damage later.

Prevention is Cheaper Than Repairs

Re-sealing might cost you a tube of silicone and an hour of your time. Ignoring a failing seal, however, could end up costing $5,000–$20,000 in internal wall and frame repairs.

The bottom line? A quick, regular inspection of your caravan seals is the cheapest insurance you can buy against water damage.