Antifouling sounds like the same job everywhere: scrub, sand, roll on the paint, splash. In France it comes wrapped in rules that surprise visiting owners, because the country has tightened up hard on where and how you may do it. Get those rules wrong and you can face a fine, not just a telling-off. Get them right and an annual antifoul in France is no more painful than at home, and often cheaper.
Here is what the French careening rules mean in practice, and what the job costs in 2025-2026 whether you do it yourself or hand it over.
The careening-area rule is the big one
The single rule that catches foreigners is this: you may not careen and antifoul wherever you like. France requires the work to be done on a designated careening area (aire de carenage), a hardstanding fitted with a collection system that captures the washdown water, paint dust and scraped antifoul rather than letting it run into the harbour. "Wild" careening on a slipway or a drying mooring, scrubbing the hull into the water, is formally prohibited and can be prosecuted.
This is why your choice of yard matters before you ever open a tin. A yard with a proper aire de carenage and a sealed wash-down area is legal for the messy jobs. A yard without one may legally have to do the work itself, with its own staff, in a controlled bay, which changes your costs completely. When you book, ask directly whether you may sand and antifoul your own boat there, and under what restrictions. The wider question of vetting a yard is covered in the guide to finding a good boatyard in France.
What it costs to do it yourself
If the yard lets you do your own work, antifouling is one of the cheapest big jobs on the boat. The lift, wash and storage are the bulk of the bill, and they are covered in the piece on booking a lift-out and hard-standing in France. The paint and the day of labour are yours.
Paint goes further than people expect. A 750ml tin can cover the hull of a 12 to 14 metre boat for a single coat and gives at least two years of protection from a quality product, though most owners apply two coats and lay on extra at the waterline and leading edges where fouling bites hardest. For a typical cruising boat, budget 250 to 400 euros for paint and rollers depending on the product, plus new anodes at 60 to 120 euros while the boat is up. A DIY antifoul, all in, sits comfortably under 500 euros on top of the lift.
A note on the rules even for DIY: you must wash the hull under high-pressure fresh water to remove the old residue on the careening area, and you must not add anything to the tin. Thinning or doctoring antifoul with other products is prohibited and can be acted on. Use the paint as the maker intends, in the marked area, and you are within the law.
What the yard charges to do it for you
If the yard does the work, or insists on it, you are paying French marine labour, and the lines stack up. Antifouling labour is commonly charged per metre of waterline, around 90 euros per metre including VAT at one French yard's published rate. The careening operation itself, the haul and wash time, can be billed at an hourly rate over 100 euros including VAT, with one tariff at 115.30 euros. Complete antifoul packages with two coats in your choice of colour run from around 450 euros for a small dinghy to 760 euros and up for a boat over 6 metres, before you add the lift and storage.
That spread, under 500 euros DIY against well over a thousand done for you, is exactly why the DIY question decides your bill. It is also why most owners haul out yearly to do the antifoul themselves rather than every second year, since the lift is the fixed cost and the paint is cheap.
Choosing the right paint for French waters
The choice of antifoul is not just budget, it is the right matrix for your boat and your waters. France pushes owners towards hard-matrix antifoulings rather than soft ablatives in some areas for environmental reasons, and the yard will tell you what is acceptable on its careening area. Match the paint to how you sail: a hard antifoul suits a boat that sits a lot and gets the occasional scrub, an ablative suits a boat that sails enough to polish itself clean. Adjust the quantity to your cruising zone rather than slapping on the maximum everywhere.
One material warning that matters in France, where aluminium hulls are more common than in Britain: never put a copper-based antifoul on an aluminium hull. The galvanic reaction will eat the metal. Aluminium boats need a dedicated aluminium-safe antifoul, and the yard should flag it, but as the owner you carry the responsibility.
Combining the antifoul with the survey
The antifoul lift is the only time the hull is clean, dry and accessible, so it is the moment to do everything below the waterline at once. While the old paint is off and before the new goes on, check the keel joint, the gelcoat for blistering, the seacocks and the cutless bearing. A survey done at the same lift saves paying twice for the same hoist, and the combined approach is set out in antifouling and survey at a French yard. If you spot the tell-tale blisters of osmosis, do not paint over them, because that is the moment to plan the treatment, and what that costs in France is covered in the guide to osmosis treatment in France.
The day of work, in order
An antifoul day on the hard runs in a sequence, and doing it in order saves you redoing it. The yard pressure-washes the hull as soon as it comes out of the slings, while the growth is still soft, because dried-on weed and barnacle is far harder to shift. Then the hull dries, an hour or two in sun, longer in Atlantic damp. You sand the old surface back to a key, fill and fair any chips and gelcoat damage, and tape the waterline cleanly. The first coat goes on, and once it is touch-dry the second follows, with extra at the waterline and the leading edges. You swap the anodes and check the seacocks while you have the access, and the boat is ready to splash.
Two details make the difference between a good finish and a poor one. Watch the temperature: antifoul will not cure properly applied too cold or in the damp, which is a real constraint on a Brittany morning in October. And do not paint over the anodes, the prop, the transducers or the saildrive seal, all of which need either bare metal, their own coating, or leaving clean. A taped-off, ordered day gives a finish that lasts the two years the paint promises rather than peeling by midsummer.
The working week and the August problem
Two practical things shape when the job actually happens. French yards close firmly for lunch, often noon to two, and many shut on Sunday and sometimes Monday, so a fortnight of work is fewer working days than it looks. And August is real: much of the French marine trade winds down for two or three weeks and the careening area may be off-limits or unstaffed. If your antifoul window touches August, confirm the yard is open and the aire de carenage is available before you book a flight.
The short version
Find a yard with a proper careening area and permission for owner DIY, and an annual antifoul in France costs you the lift plus a few hundred euros in paint and anodes. Hand it to the yard and the labour at 90 euros a metre and over 100 euros an hour turns it into a four-figure job. The rules are stricter than at home, but they are logical once you understand them: do the work in the right place, with the right paint, and do not let anything run into the harbour. Follow that and the French antifoul is no harder than anywhere else, just done by their book.
