Trefjar Ltd. manufacturer of fibreglass boats, aquaculture equipment and acrylic parts was established in the town of Hafnarfjörður in Iceland in 1977 by its managing director Mr. Auðun N. Óskarsson. The company commenced its operation with one employee, manufacturing car body parts of reinforced fibreglass. The company has expanded its operations considerably since 1977 and is now the largest, and by far the leading manufacturer, of its kind in Iceland. The company has now two factories: one since 1996 a 3.500 m2 factory and another since 2008 a 3.800m2.

Trefjar Ltd. has manufactured over 400 small craft fibreglass fishing boats of several different sizes and types since 1979. These boats, SKEL 26, SKEL 80 and SKEL 86 were the most popular fishing boats among the small boat fishing men in Iceland in the eighties. The SKEL boats were a new concept in the building of small fishing boats based on an old traditional Icelandic design of small craft vessels "the Breidarfjardarlag" which has proved its working capabilities and seaworthiness an rough seas around Iceland, since the beginning of the century