If you cruise an aluminium boat, France is close to the promised land. This is the country that more or less invented the modern aluminium centreboard cruiser, and the skills to weld, fair and protect a metal hull are spread up and down both coasts in a way you simply do not find in Britain or the Mediterranean countries. When I bent a keel-band fitting on a half-tide rock in Brittany, the relief of being in France rather than, say, southern Spain was real. The right welder was an afternoon's drive away.
Why France, of all places
Three of the best-known aluminium yard names in the world are French and they are clustered in Normandy and the Vendee. Allures Yachting and Garcia Yachts both build aluminium bluewater boats out of Cherbourg-en-Cotentin, with Garcia fabricating hulls at Caen, and both yards trace their craft back decades. Alubat has been building aluminium centreboarders at Les Sables d'Olonne since 1973. Around those big names sits an ecosystem of smaller fabricators, ex-employees who have set up their own workshops, and the marine welders who serve the fishing fleet.
The practical upshot for a visiting owner is that a competent aluminium welder is genuinely findable here, which is not something you can say everywhere. The flip side is that not every welder who works steel can work marine-grade aluminium, and the difference matters enormously.
Aluminium is not steel, and not all aluminium is the same
Welding marine aluminium is a TIG or MIG job using the right filler for the alloy. Most cruising hulls are built from the 5000 series marine alloys (5083 and 5086 are the common ones), which are chosen precisely because they tolerate seawater. A welder who normally repairs trailers or ladders may not have the right filler wire, the right shielding gas, or the experience to avoid the cracking and porosity that ruin an aluminium weld. When you call round, the question to ask is not "can you weld aluminium" but "do you weld marine 5083 and 5086, with what filler." The answer tells you instantly whether you have found the right workshop.
The vocabulary: aluminium welding is soudure aluminium, a welder is a soudeur, and a metal-boat fabricator is a chaudronnier (literally a boilermaker, the trade name for heavy metal fabrication). A workshop advertising chaudronnerie navale is exactly what you want. Plate is la tole, and a corrosion problem is la corrosion or, when it is the galvanic kind, la corrosion galvanique.
Finding the workshop
Start at the source. The areas around Cherbourg, Caen and Les Sables d'Olonne have the deepest pool of aluminium talent because the production yards are there and former employees set up locally. But every region with a serious fishing fleet has a chaudronnier who fabricates and repairs aluminium and steel for working boats, and they are often the best value because they are not chasing yacht-refit margins.
The capitainerie list and the chandlery counter are again your fastest leads as a visitor. So is the haul-out yard: if you are lifting out anyway, the yard usually knows the welder it calls in for metal jobs, and having the welder come to the boat in the slings or on the hard is far easier than the reverse. The whole question of getting a metal boat ashore in the first place is one I covered in the piece on hauling out as a foreign owner at a French yard.
What it costs
Marine labour at a typical French coastal yard runs around 50 to 54 euros per hour including VAT, and skilled welding sits at the top of that band or above, because it is specialist work and the workshop carries expensive kit. The standard French VAT rate of 20 percent is included in a private-owner quote. The bigger variables are access and preparation:
- A small weld repair, well prepared and easy to reach, can be an hour or two of actual welding.
- A keel-band, skeg or rudder-stock repair often needs the boat ashore and the area ground back to bright metal first, which adds yard time and lift fees on top of the welder's hours.
- Anything inside a tank or a closed compartment is slow, awkward work and priced accordingly.
Ask whether the quote is TTC (VAT included) or HT (before VAT), and whether grinding and preparation are in the welder's price or billed separately by the yard. On larger refit work the VAT treatment can shift, especially for non-EU visitors, which I unpack in the article on VAT on boat repairs and refit in France.
The thing that actually kills aluminium hulls
It is rarely the welding that gets an aluminium boat into trouble. It is galvanic corrosion, the slow electrochemical eating-away that happens when dissimilar metals share seawater and a poor bonding system lets current flow. A stainless fitting bolted carelessly to an aluminium hull, a stray-current leak from a shore-power fault, a tired set of anodes: any of these will pit and perforate plate far faster than a knock on a rock.
So when you have a welder fixing damage, get them and a marine electrician to look at the bigger picture together. Check the anodes, check the bonding, and check there is no stray current leaking into the water at the berth. The corrosion and the electrics are the same problem viewed from two ends, which is why I treat finding a good sparky as part of the same maintenance job in the guide to finding a marine electrician in France.
What you can do yourself, and what you cannot
On board, the aluminium owner's job is prevention and triage. Keep the anodes fresh, keep dissimilar metals isolated with proper isolation washers and bedding, and rinse salt off bare metal. A minor scrape that has not breached the plate can be cleaned, primed and over-coated yourself with the right aluminium-compatible products. Carry the manufacturer's recommended primer and paint, because the wrong product on bare aluminium causes its own corrosion.
Welding itself is not a DIY-at-anchor job, full stop. It needs power, shielding gas, a clean dry environment and a skilled hand. Attempting a structural aluminium weld with hire kit and a YouTube tutorial is how you turn a repair into a write-off.
The good news for the visiting metal-boat owner is simple. You are cruising the one country that takes aluminium hulls as seriously as you do. Find the chaudronnier, ask about the alloy, sort the corrosion at the same time, and a metal hull will outlast you. That deep bench of marine trades is the same advantage I keep pointing visitors towards in the overview of chandlers and boat repairs in France.
