J Composites adventure

J Boats is the story of two brothers passionately fond of water sports: Bob and Rod Johnstone.
In 1977, they won the US Block Island Week aboard their first one-design: the J24. The adventure was launched ! There's only a small step from passion to creation: folly... Thanks to their passion coupled with their specialized knowledge of navigation, the Johnstone brothers are going to think up high-performance and sailor yachts. Family is getting bigger...

Since 1994, J Composites site has been adapting and building the Johnstone plans for the European market creating yachts intended for both cruising and racing navigation. In either case, the future owner won't call the hull quality into question. Construction by J Composites site guarantees the best performances thanks to: the choice of top-of-the-range materials, the thoughtful draw of every components of the yacht, the skilled and passionate workforce. A journey among J Composites production to uncover the J brand secret...

Discover all the history of the Jboats company, date by date.




« I've always thought of sailing as a way
to bring a family together
 » - Rod Johnstone



The hull & the deck
SCRIMP: this is the name of the building process used by J Composites design department. It's an ultra light and tough sandwich made up of 3 successive layers: glass fibre fabric, balsa and glass fibre fabric. The construction technique might sound simple, but requires an extreme accuracy in tissue layout. Then, it's glued all together with a resin infusing method.

Infusing method ?
The only purpose for the resin is to glue the parts. Too much resin is an useless overweight. In J Composites, the resin is aspired (instead of being injected or applied by hand), which allows it to go in every sandwich pores while managing the connexion between the sandwich and the resin.


Sandwich SRIMP: Glass fibre - Balsa > Assembly using the resin infusing method - > Glass fibre - Balsa / resin near 65% / 35% - > Strength and enhanced performance.

The ballast


Is it just a common keel? Do not misunderstand, because in J Composites, lead has been chosen as the keel constituent material. To be more precise, we need to be concrete! The lead provides outstanding physicals properties compared with the casting generally used by sailboat builders. Its density is 11.35g/cm3 against 7.3g/cm3 for the casting. It means that for an equivalent weight, the keel volume will be 1.5 times smaller.

The keel of each unit is covered by hand in order to provide a perfectly smooth surface which gives optimal hydro dynamical specifications when water is rubbing against the keel.


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An eye for detail

didier le moal

"Our main purpose is to build weather-proof sailboats, with a marine behaviour whatever the weather conditions" according to Didier Le Moal, Managing Director.

That's why; we constantly have an eye for detail. Two examples : The floor timbers are directly infused into the hull mould in order to reinforce the structure. The most requested inside partitions in navigation are made with infused composite and are laminated to the hull and deck, which means they're assimilated to the entire structure of the sailboat (rather than simply glued elsewhere). Reassuring answers when you know how strongly wind and water forces could move the inside structure of the sailboat.




"Take time to go fast..."

Always increase efficiency to enjoy even more navigating... From the primary winches position, to the well positioned steering station, through the manoeuvrable carbon bowsprit from cockpit, every detail is thought out to make your navigation easy and effective. There's no need for a large group of experienced crew to go sailing with a J boat: the subtle layout of the deck allows an easy manoeuvring!
What really stands out on a J Boat at first glance is the large cockpit sheltered from the roof. It's both functional (privileged access to the different driving positions) and comfortable (many foot-rests, ease of movements...) Thanks to the efficient non-skid desk, the way used from the crew to go forward is really easy, either to sunbathe or handle the spinnaker.


The life on board...

A team of skilled workers is making a serious point about the inside design. Comfort and space optimization are keywords.
The interior is in moabi wood which makes it warm and welcoming; far away from the Spartan stereotypes of a regatta boat: fridge unit and stove equipped galley on the biggest units, inconspicuous and cleverly arranged handrails... Above the large chart table, the big openings to the outside increase the inside space.
"Versatility, it's definitely the major asset of a J; a high performance hull shape and a well-thought-out interior..."


J Composites keeps the strong sense of family, which was the Johnstone brothers' strength, by assisting every J owner. Each unit is guaranteed with unrestricted use. Does that not prove J Composites can strongly believe in its sailboat quality? Thanks to a network of authorized dealer; wherever you are there's always a skilled person to advise you on navigation and help you with the sailboat maintenance.


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Our ranges


Dual purpose e series