Fagerdala Hull System
- a truly revolutionary hull concept

The history behind the Fagerdala Hull System
Back in the late 1980s, inventor Sven Jönsson was wondering what to do about his 100-foot motor yacht, sell it or refit it? Luckily, he settled for the latter. Built in 1939 for Swedish industrialist Torsten Kreuger to designer K. Ljungberg’s specifications, in riveted alloy on a Dural frame, she was the fastest and most extreme vessel of her class. Powered by three Wright Murling V-12 petrol engines, she could make no less than 30 knots.

Badly buckled and in an awful state of repair, a complete restoration was needed. Being the inventor of the GMT and TDS teak-decking concepts in 1972, Mr Jönsson could draw on his long experience of a broad range of glue applications. He focused on developing a visco-elastic and completely water-proof glue that could withstand the forces between a rigid closed-cell foam sheet and a twisting and flexing metal hull. After rigorous tests, supported by the Royal Institute of Technology in Stockholm, and Professor K-A Olsson, the refit was initiated.

A new superstructure was created out of 3 mm welded single-bent aluminium. There after, vacuum-glued sheets of closed-cell foam were added. The foam surface was then planed to shape. As required, additional layers were glued on to create recesses and other design features.
Once reinforcing, fairing and painting were completed, the result exceeded all expectations.

In 2005, after 14 years of service in the Mediterranean and the North Sea, various areas on the structure were opened up to see how well the concept had worked in practice. At a bottom section below the engine room, one metre square of foam had separated from the metal. The reason was found. The aluminium primer had dissolved caused by a broken rivet which allowed oily bilge water to penetrate the hull plating. All other surfaces were like new!

Now available – thoroughly tested and proven
Today Fagerdala Marine Systems AB, a sub-sidiary of Fagerdala World Foams, Gustavsberg, Sweden, is the owner of the prototype vessel, M/Y United Spirit, and has the sole world-wide rights to the manufacture and marketing of this thoroughly tested and proven hull technology. An in-house certified team will professionally apply the Fagerdala Hull System to any vessel, made from steel or aluminium, anywhere in the world.

It’s time to replace traditional fairing – with all its problems – with the Fagerdala Hull System – with all its advantages!