WE BUILD MAST SYSTEMS FOR THOSE WHO NEVER COMPROMISE
When you’re out on the water, there is no room for compromise. A mast must perform – not just in theory, but in real life. In harsh weather. Under load. Offshore.
That’s why sailors around the world choose JOHN MAST.
With more than 50 years of experience and over 10,000 masts produced, we know exactly what works – and what doesn’t.
Each mast is designed, calculated and tested for its specific boat, rig setup and sail plan. No standard profiles. No guesswork.
We design and manufacture custom aluminium masts and complete rig solutions in Denmark.
Product Range
Custom Built Masts
NO STANDARD SIZES. NO RANDOM SOLUTIONS.
When we design a custom mast, we consider the complete setup:
Boat type, length and displacement
Sail plan and sailing characteristics
Intended use: cruising, racing or a combination
Load calculations, trim and flexibility
Options for future upgrades
Everything is calculated, tested and fine-tuned so the mast works in perfect harmony with rig, sails and hull. The result is a solution that feels intuitive to use and delivers documented performance on the water.
Complete Rig Solutions
Our complete rig solutions are developed based on the boat’s design, intended use and expected service life. Nothing is standard. Everything is specified.
A complete rig solution typically includes:
Mast and boom designed for an optimal strength-to-weight ratio
Standing and running rigging specified for purpose and load
Custom-designed fittings, chainplates and hardware
Structural calculations, load analysis and documentation
Technical coordination with shipyard, designer and owner
Quality control at every stage — from construction to delivery
The result is a rig that works as a unified system — not as individual parts.
Components & Hardware
COMPONENTS THAT MATCH THE REST OF THE RIG
Components are never stronger than the system they belong to.
That is why we see hardware as an integrated part of the complete rig solution — not as standard items on a shelf.
Our product range is assembled to work optimally together with our masts and rigs, ensuring correct load distribution, reduced wear and long-term performance.
This is why professional boat builders, shipyards and operators choose John Mast — because our solutions last, even after many years of use.
Service & Maintenance
Many mast failures do not occur suddenly — they develop over time. Wear, metal fatigue, corrosion and incorrect trim can remain invisible until the consequences become serious. With regular mast maintenance, we identify problems before they become critical.
The result is higher operational reliability, fewer unexpected costs and a mast that performs as it should — year after year.
Get in Touch
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