Camper Van Conversion Repair for Aftermarket Builds

The seal by the door is the whole difference. A factory coach carries an RVIA plate, a build sheet with appliance model numbers, an inspected LP install and a twelve volt system built to a published standard. A conversion carries whatever the builder decided, and the builder may have been a professional shop in Oregon or a first timer with a jigsaw. Neither is automatically better, but only one of them is documented.

That matters at three moments: sourcing a part, filing a claim and reselling the van. We keep the two on separate pages here because a customer asking about a Travato and a customer asking about their own build need different answers to almost every question they have.

This is the most common single defect we find. Dicor self leveling lap sealant is excellent on an EPDM membrane and it is the wrong product on a painted steel van roof with rib crowns running underneath a fan flange. It skins over, looks perfect for two seasons, then releases at the edge and water follows a rib until it finds a gap in the headliner.

A penetration in steel wants butyl tape compressed under the flange, fasteners torqued in a pattern rather than one at a time, and a polyurethane over the heads. When we rebed a fan we pull it entirely, scrape to clean paint, prime any scratched steel and set it fresh. Sealing over a failed bead from above has never once held on a van roof in our experience.

• Butyl tape under the flange, compressed evenly, not silicone
• Polyurethane such as Sikaflex 221 over the fastener heads
• Rib crowns shimmed or the flange bedded thick enough to bridge them
• Solar brackets bonded and backed, never screwed into bare roof skin

Galvanizing protects a surface, not a cut. The moment a hole saw or a jigsaw goes through a van panel, the exposed edge inside that opening is bare steel, and it sits in the wettest part of the assembly behind a bonded window flange or a vent collar. A build that primed and sealed those edges will be fine for a decade. A build that did not shows a paint bubble two inches from the opening at around year four.

Repairing it means the window comes out. There is no shortcut. We remove the unit, cut back to sound metal, treat and prime the edge properly, then rebond and refinish. Owners are always surprised the fix costs more than the window did, and the reason is that half the job is undoing a five minute decision made during the build.

A van body twists constantly and the interior does not. That argument gets settled at the fasteners. A cabinet run screwed to the ribs at eight points survives; the same cabinet screwed into flat panel between ribs works its holes oval within a season, and the tell is a squeak that arrives before the gap does. Add water tanks and the numbers get worse quickly.

Our standard rebuild uses backing plates behind the sheet, rivnuts set into rib faces, and fasteners chosen so the plate carries shear rather than the screw thread carrying tension. On 80/20 extrusion builds we tie the frame into the seat rail and the D ring anchors instead of into panel at all.

1. Unload and remove the cabinet run to expose the mounting faces
2. Map which fasteners landed in ribs and which landed in nothing
3. Set rivnuts or backing plates at every unsupported point
4. Reinstall to torque and check for movement with the van jacked at one corner

Diagnostics on a conversion bills at $285 per hour with a one hour minimum, credited against an authorized repair, and that hour buys a documented look at the whole system rather than a guess. We check the fuse class at battery positive, conductor sizing against the actual charge sources, whether the bank has any ventilation, whether there is a shunt telling the truth about state of charge, and whether a carbon monoxide detector exists at all.

Most builds pass most of that. The failures cluster in the same three places every time: overcurrent protection sized for convenience rather than for fault current, a DC to DC charger installed without regard to alternator duty, and a battery compartment with no path for heat. We write those up plainly and let the owner decide what gets corrected.

Diesel air heaters are the right answer in a van and they are unforgiving about installation. Exhaust needs a downward slope, gentle bends and a terminus away from the combustion air intake, and the floor penetration needs a proper grommet and heat shield. We correct these routinely, and when the exhaust has been run through a wheel well or terminated under a slider, we tell the owner why the lockout keeps returning.

LP is different. A conversion has no certified gas install on record, so a propane system built during the conversion gets pressure tested and inspected before we work near it, and the $45 hazmat and disposal charge applies whenever LP or refrigerant is handled. Anything we consider unsafe gets documented and left off, not quietly patched.

The hardest conversations on conversions are not technical. An owner with tens of thousands of dollars in labor and parts inside a van that is insured as a bare cargo van has a problem no repair fixes. We say this on the first visit because it is cheaper to hear early: gather receipts, photograph every system before it is buried behind a panel, and get the policy language matched to what the van actually is.

When a claim does happen, documentation decides the number. We write scopes that separate the van from the build, because an adjuster who can see those as two categories will pay both, and one who cannot will pay for a van.

Conversions are the easiest units in the building to place. Under twenty five feet and under ten feet tall, one goes into any open bay and onto a standard lift when we need the underfloor to reach a heater exhaust, a tank strap or a wire pass through. What we schedule instead of space is discovery time: with no diagram and no build sheet, tracing a circuit or a leak path on somebody else's build is real hours, and we quote it as its own line rather than hiding it inside a repair.