An old camper is two projects wearing one paint job. There is the remodel you can see, which is the same work as any other camper. And there is age, which is its own scope of work, and which does not care how dry the camper has been or how good it looks in the driveway.
Water damage you hunt for the same way in any camper, and the inspection sequence in where to start on a camper renovation applies here word for word. This page is about the rest: the things that fail because of the calendar, not the weather. Rubber, insulation, rust and gas fittings all age out quietly, and most of them look fine right up until they are not.
Rust gets the first look, not the interior
On a camper measured in decades, the frame decides whether there is a project at all, so it gets looked at before the cushions do.
Not all rust is the same finding. The inspection guides from the vintage trailer repair trade draw the line clearly: surface rust can look dramatic and mean little, while flaky rust and pitting, the small holes and pockmarks where rust is eating into the metal, are the serious version. The test is the same one you use on wood. Probe the worst areas gently with a screwdriver or an awl. Metal that gives way, or crunches as weakened layers collapse, has lost real material, and that is a frame repair before it is anything else.
Do the same probing on any wood you can reach, especially the subfloor and the framing near the floor line. Wood that is soft or crumbles under the tool has lost its strength to long moisture exposure, whatever the surface looks like.
A frame repair is welding, and welding changes the budget. If the probing finds soft frame members, price that repair before you buy anything for the interior, because everything else on this page sits on top of it.
The body comes apart differently, and you keep every panel
A lot of older campers are a wood skeleton wearing a thin aluminum skin, and the skin comes off in a particular order. Getting that order right is the difference between a repair and a second repair.
The Vintage Camper Trailers Magazine walkthrough of a canned-ham rot repair lays out the sequence: the J-rail or J-molding comes off first, along with any windows and vents in the repair area, and only then does the skin lift. The skin is fixed to the wood framing with staples, tacks or small nails, and on a typical canned-ham the roof panel laps about 1/2 in over the top of the side skin, so the roof releases before the sides do. Work a small pry tool slowly. The same article warns that old aluminum tears and distorts easily, and a torn skin is a part you cannot buy.
That is the general rule for the whole trailer: the old parts are the pattern. Panels in these profiles are not stocked anywhere, so every piece that comes off goes back on. Take skins off whole, keep the trim, and label everything. The existing nail and staple holes are also your alignment guide when the panel goes back on, which is a favour you do for your future self. Reassemble with fresh butyl tape under every window, vent and piece of exterior trim, because the original putty is the reason you found rot in the first place.
Interior panels that must be remade, take out in one piece and use as templates. If you are cutting a batch of them, the cut list calculator will nest the parts and tell you how many sheets the job really needs.
Materials, in both markets
On an old camper the materials list starts with the parts you take off. The originals set the thickness as well as the shape, so measure the old panel before you buy the new sheet. Units are the trap: a US sheet and a metric sheet sold under the same name are different products, so I have set them side by side rather than converted one into the other.
| Where it goes | US stock | Actual | Metric stock | Actual |
|---|---|---|---|---|
| Remade interior panels | the nominal size nearest the old panel | thin US ply runs under its name, so measure the sheet too | the metric size nearest the old panel | as labelled |
| New cabinet sides, and anywhere a screw has to hold | 3/4 in ply | 18.26 mm | 18 mm ply | 18.00 mm |
Do not treat a pair as one item. US ply is named nominally and milled under that name. Metric ply is what the label says. The gap is a fraction of a millimetre, which is enough to leave a patch proud of the old floor or a remade panel loose in its channel. Buy the sheet your merchant stocks and fit the joinery to the sheet you actually have.
- Sheet size and count. The US sheet is 4 ft x 8 ft, milled to 1220 x 2440 mm. AU and NZ merchants stock 2400 x 1200 mm, though some carry 2440 x 1220 mm as well, so confirm before you cut. Continental EU stock is 2500 x 1250 mm. How many sheets the job needs is a nesting question, not a rule of thumb: the cut list calculator above counts them on your market’s sheet, and the market matters, because a list nested on the US sheet can be unbuildable on the AU sheet, where the long side is 40 mm short.
- Fasteners. The skin goes back on with the same type and size that came out, because the existing holes are the gauge. Take one of the old staples or tacks to the counter and match it. For new screws, US boxes are labelled by gauge number and length in inches, a #8 by 1-1/4 in, while metric racks are labelled by shank diameter and length in millimetres, a 4.0 by 30 mm. The two systems do not line up, so buy from your own market’s rack rather than converting a plan’s callout.
- Butyl tape. Sold by roll width in both markets. Take a piece of the trim it will sit under and buy the width that covers the flange.
The parts that age out even in dry storage
This is the money that surprises people, because none of it shows in the photos.
Tires die of age, not mileage. The trailer tire guidance is blunt that age matters more than tread, because the rubber degrades whether or not the wheel turns. Read the DOT code on the sidewall: the last four digits are the week and year of manufacture, so a tire stamped 2520 was made in the 25th week of 2020. The replacement advice from tire sellers and owner forums clusters between five and seven years regardless of tread. On a camper that has sat for a decade, the tires are scrap on day one, and if the date code is only three digits, the tire predates the current four digit format and is far too old to argue about.
While the wheels are off for tires, deal with the hubs. The grease and the seals in there are the same age as everything else on the axle, and repacking bearings is cheap insurance next to a spindle repair on the shoulder of a highway.
The propane system gets proven, not trusted. The RV technician training material describes the correct test: a manometer on the system, pressurise it, and watch for any drop over the test period, with soapy water on the fittings to locate a leak if the gauge moves. Never search for a leak with a flame. On a camper this old I would pay a certified tech for that hour before the first night in it. The cylinders themselves have a requalification schedule, and the Vintage Camper Trailers piece on requalifying tanks covers when an old cylinder can be recertified and when it is done. A filling station will refuse an out-of-date cylinder anyway, so sort it before the trip, not at the pump.
If the weight sticker is missing or unreadable, weigh the trailer. A public scale gives you the real starting number, and the weight discipline in the camper renovation guide works from there.
The wiring is a rebuild, not a repair
Old camper wiring is the one place where I think restoration purity is the wrong instinct. Keep the light fixtures. Replace everything that carries current.
The Vintage Airstream restoration reference is a good picture of what you are starting from. Trailers of the mid to late 1950s shipped with a basic 120 volt hookup system and almost nothing on the 12 volt side, sometimes a single light run from the tow vehicle. After decades, it describes the wiring sheathing as decomposed, the insulation as deteriorated, and the runs as prone to shorting against sharp edges of the aluminum skin and frame, not helped by the factory not always fitting grommets. That is not a system you patch. The rewire it documents runs new cable throughout, with a grommet at every point the wiring passes through metal, and that is the standard worth copying whatever brand your camper is.
While the walls are open is also the time to size the new system properly rather than copying the old gauges, which were chosen for a couple of incandescent bulbs. The DC wire size calculator and the battery bank calculator cover the two decisions that are miserable to redo after the panels go back on.
The converter is the other quiet battery killer. If an old camper has a converter at all, RV With Tito’s write-up explains the problem with the early single stage units: they hold one charge voltage, overcharge the battery, and shorten its life, where a modern multi stage charger steps the voltage down as the battery fills. Progressive Dynamics publishes a cross reference guide that matches your existing converter model and battery type to a current replacement, which takes the guesswork out of it.
The order of work
Same logic as any camper, with the age items moved to the front, because several of them decide whether the project is viable.
- Frame probed, rust priced. A welding bill you discover in month four was always cheaper in week one.
- Water damage found and scoped. The full sequence is in where to start on a camper renovation.
- Structure and skin repairs. Skins off carefully, everything kept, butyl tape on the way back.
- Running gear. Tires by date code, bearings while the wheels are off.
- Propane system tested, cylinders requalified or replaced.
- Full rewire and converter upgrade, while the walls are open.
- Floor, cabinets, interior surfaces.
- Paint, textiles, trim. Last, as always, and it will feel overdue by the time you get here. That is normal.
Where the rest of this goes
The interior work on an old camper is the same as on a newer one once the structure is honest. Flooring picks up when the subfloor is proven sound, and if the original cabinets survived, painting them keeps the period look for a fraction of the weight and cost of new boxes. If your old camper is a pop-up, the lift system and canvas add their own lead times, and the pop-up camper remodel guide covers those before anything on this page.