Seahull 4.0 m Catamaran
The Plastic Catamaran Made in New Zealand
A twin-hull boat roto-moulded in one piece of double-skinned polyethylene. Designed, and moulded by hand, by Stephen Snedden.
3.9 m
Length
1.9 m
Beam
50 HP
Max outboard
700 kg
Max load
Specifications
Straight From the Builder’s Plate
New Zealand Builders Plate
SEAHULL
Max outboard power 50 HP
Max outboard weight 135 kg
Max persons 4 / 400 kg
Max load (people, gear, motor) 700 kg
Weld NZ Ltd · seahull.com
Seahull 4.0 m
Length 3.9 m
Beam 1.9 m
Hull height 800 mm
Hull weight 200 kg
Towing weight on trailer approx. 450 kg
Hull material Roto-moulded MDPE polyethylene
Construction One piece, double skin, 6 to 8 mm
Outboard range 5 to 50 HP, single or twin
Reduce the number of people and the load in bad weather, as stated on every builder’s plate.
The Boat
A Hull Shape Built for Sea-Going Work
Stephen first drew the Seahull in aluminium, then moved it into moulded polyethylene. Every part of the shape was drawn for performance at sea.
Asymmetric Twin Hulls
Two deep-vee, well-chined hulls with a tunnel between them and a centre skeg that protects the outboard from debris.
One-Piece Double Skin
Roto-moulded in one piece, 6 to 8 mm thick and UV resistant. Water and chemicals don’t harm it.
Fishing Ready
Four rod holders at the bow and stern, plus grab handles on both sides of the stern.
Self-Draining Cockpit
A 1.5 m by 3.0 m central deck. Water runs out through the corner scuppers.
Foam Fill or Storage
The double skin can be foam filled for commercial survey, or fitted with storage hatches.
Light to Tow
200 kg bare and about 450 kg on its trailer. The trailer is part of the package.
Workboat · Fishing · Dive platform · Duck hunting
The Range
Hulls, Trailers & Parts
Seahull 4.0 m Hull
The bare hull, ready for your own motor, console and fit-out.
Seahull Wheely Boat
The Seahull 4.0 m in its Wheely Boat version. Ask Stephen for the details.
Seahull Floating Trailers
Floating trailers made for the Seahull hull.
Road Trailers
Galvanised or aluminium trailer designs to suit the hull.
Seahull Parts
Buy the back set on its own, or the complete back, front and floor set.
Every new Seahull hull comes with a free Speed Welder, made in NZ for fast plastic repairs on-site.
Our Story
Ten Years on Paper. Fourteen on the Water.
Stephen Snedden spent ten years designing the Seahull on paper before the first hull was built, fourteen years ago.
He made the design and the moulds by hand, himself. The hulls are full of folded, stitched sections that run into compound curves, and every seam of the moulds was stitched, welded, faired and panel-beaten smooth.
Stephen trained as a fitter and turner, won the 1989 National Youth Skills Olympics in constructional steel and represented New Zealand in Birmingham. He built aluminium boats before moving the Seahull into moulded plastic.
Stephen Snedden, designer and builder, Weld NZ Ltd
Trusted by professionals across New Zealand
Featured in The Shed and Trade-A-Boat. Shown at Fieldays and the Auckland Boat Show.
Contact
Talk to Stephen
Ask about a hull, a trailer or parts. Send the form, or message on WhatsApp for a quicker answer.