Welcome to the catamaran design website of Derek Kelsall.

With over 40 years of specialising in Catamarans and composites, and developing the KSS (Kelsall Swiftbuild Sandwich) custom build process for professional and home boat builders, Kelsall Catamarans is the world leader in this field.

Design Plans

Arrangements

Resin Infusion

Frames for
Half Hull

Shaping and
Lamination

Modular
Assembly

Latest KSS Boat Building Workshop in Pensacola, Florida

Interested in a lively debate on B A L S A?

KSS 58 being built by Ballotta, Peru

KSS 39 being built in Tacoma - Tacoma Cats

For more pictures of KSS 39 click into the design construction page here

Aqua Blue sailing in the Mediterranean. This 39 footer has enjoyed 32 years of regular sailing.

See the Kiss Kat range.
For a trailer sail catamaran that is simpler, better and more convenient.
www.kelsall.com/kisskat

Click here for a list of our independent KSS contacts around the world.