Every tender starts life as the boat nobody thinks about and ends up being the one you use most. It runs the anchor out, ferries gear ashore, gets dragged up shingle beaches and spends its off-season sitting in the sun. Then it gets asked to look presentable alongside a yacht that cost forty times as much. 

A tender earns its keep in hours rather than in appearance, and the hull material decides how many of those hours come with a maintenance bill attached. 

That workload is why plastic boats in NZ have moved from a niche curiosity to a standard choice for cruising sailors, coastal fishers and anyone who has repaired a gelcoat chip in a marina car park. 

What Fibreglass and Aluminium Tenders Cost You Over Time 

Fibreglass is a finish over a structure, and the finish is the part that fails. Gelcoat chips at every point of contact, which for a tender means the bow, the gunwales and the transom. Each chip lets water into the laminate. Repair is a sanding, filling and colour-matching job that either consumes a weekend or costs a day rate. Left alone, water in the laminate becomes a structural problem rather than a cosmetic one.

Aluminium avoids that problem and introduces others. Welds are stress points, and a hull that has spent years being beached on shingle will eventually show it. Salt water attacks fittings and any point where dissimilar metals meet. Aluminium tenders are also loud, which matters a good deal more when you are rowing back to a mooring at six in the morning.

Both share a hidden cost, which is the care they demand. Covering, rinsing, inspecting and touching up are all jobs that come out of time on the water. Owners comparing plastic boats for sale against a laminate hull usually start from this maintenance load. For a boat that exists to support another boat, that is a poor trade.

How Rotational Moulding Changes a Hull

Rotational moulding produces a hull in a single piece. Powdered polyethylene is loaded into a mould, heated and rotated on two axes so the material coats the interior evenly, then cooled. 

Two things follow from that. There are no joins, no welds and no laminate layers, so there is no seam to split, no weld to crack and no gelcoat to chip. The colour is part of the material rather than a coating, so a scrape shows as a scuff instead of exposing a substrate. Drainage channels and anchor wells form in the moulding rather than being fitted afterwards. 

The material also flexes under impact and returns. A hull that meets a wharf pile at speed absorbs the hit rather than transmitting it into a fracture. This is the property that matters most for a tender, because a tender’s working life is a sequence of minor collisions with hard objects.

Maintenance Tasks that Disappear 

The practical case for polyethylene boats is mostly a list of maintenance tasks that disappear: 

• No rust, so fittings and hull are not in an argument with salt water 
• No gelcoat repairs, no colour matching, no sanding back a chip before winter 
• No repainting or antifoul touch-ups on a hull that lives out of the water 
• Light enough for two people to lift onto a beach or a foredeck 
• Washes down with fresh water and nothing else 

The weight point deserves attention. A tender that is awkward to launch gets used less, and a tender that gets used less stops justifying the space it takes up on deck. Weight is the specification most owners underrate and the one they notice daily. 

Where These Boats Earn Their Keep 

Yacht Tenders 

Yacht tenders are the obvious application. Sitting on a foredeck or towed astern, a tender takes UV through the whole season and knocks against the topsides at every mooring. A polyethylene hull will not mark a hull it bumps into the way an aluminium gunwale does. 

Fishing Dinghies 

Fishing dinghies are the second. Shallow harbour and estuary work means grounding on sand, shingle and oyster rock as a matter of routine, and plastic fishing boats shrug off contact that would need attention on a laminate hull. The material is also soft underfoot and low on noise, which counts in shallow water where fish spook easily. 

Harbour and Coastal Work 

Coastal and harbour use covers everything else. Ferrying people and gear, running lines, tending moorings and general work around a jetty all involve repeated contact with hard surfaces. Commercial and club users tend to reach the same conclusion faster than private owners, simply because their boats do more hours. 

The Bevy Craft Range 

Three hulls cover the range of plastic boats across NZ, and the choice comes down to size and intended load. 

• Bevy Craft – Bug. The smallest, suited to short ferrying runs and single-handed use where stowage space is the binding constraint. 

• Bevy Craft – Pug. Sits in the middle and is the most common choice for a yacht tender, with capacity for four and a transom taking a standard outboard. Moulded-in tie-off points and carry handles form part of the hull rather than being fitted, so there is nothing bolted on to work loose. 

• Bevy Craft – Grub Boat. The largest, suited to heavier work where load capacity outranks stowage. Fishing charters, dive operations and farm river crossings all sit in this bracket, as does anyone regularly moving three or more people plus gear. 

All three carry the same construction, drainage arrangements and UV stabilisation, so the decision is about size rather than specification. Measuring the stowage space on deck before choosing is worth doing, since a hull that will not sit properly gets towed instead. 

Two Seasonal Routines Compared 

The difference is easier to see as a seasonal routine than as a specification list. 

A fibreglass tender needs a haul out, an inspection for chips and stress cracks, filling and fairing where needed, colour matching, and a cover for storage. An aluminium tender needs a weld inspection, attention to any point where fittings meet the hull, and a rinse regime to keep salt off. 

A polyethylene tender needs a wash. Marks buff out or stay as marks without consequence, and the hull can sit uncovered through a New Zealand summer without the material degrading. Winter storage means putting it somewhere and leaving it. 

Over a ten-year ownership, that difference compounds into a substantial number of weekends, and into a resale condition that reflects use rather than neglect.

Final Word 

A tender is judged over years by how little attention it demands. Anyone who has spent a Sunday fairing a gelcoat repair rather than being on the water already knows the value of a hull that needs nothing beyond a rinse. 

FSP New Zealand®  manufactures the Bevy Craft range for coastal and harbour conditions here, and can talk through which hull suits a particular boat and mooring arrangement. Anyone comparing plastic boats in NZ against a laminate or alloy tender this season can get a quote on 0800 377 112. 

Frequently Asked Questions

How does the hull handle sustained UV exposure? 

The material is UV-stabilised, so it holds structure and colour through long exposure rather than chalking the way a painted or gelcoat surface does. 

Can these boats take an outboard? 

Yes. The transom is built for a standard outboard, with the specific rating varying by model, so confirm the figure for the hull you are considering. 

What happens if the hull is damaged? 

Polyethylene is repairable by welding the material itself rather than filling and fairing over it. Most impact damage presents as a scuff rather than a crack, and cosmetic marks carry no structural consequence. 

Are they suitable for salt water? 

Yes. Plastic boats around NZ harbours do not corrode, which removes the failure mode that affects metal hulls and fittings in a marine environment.