Aluminium hull RIBs: why they dominate serious European tenders

Weight changes everything on a tender

An aluminium hull is typically 20–30% lighter than the equivalent fibreglass hull. Lighter means a smaller engine for the same performance, less strain on davits and passerelles, and a boat two people can still recover from a beach.

On a yacht with limited davit capacity, that weight difference often decides whether you can carry a 3.4 m or a 4.2 m tender.

Impact resistance and repairability

Marine-grade aluminium deforms rather than shatters. A grounding on a rocky Adriatic shoreline that would crack and delaminate a fibreglass hull usually leaves a dent that can be repaired by any competent welder.

That difference is why commercial, rescue and military operators standardised on aluminium hulls decades before the leisure market followed.

Hypalon or PVC tubes?

PVC is lighter and cheaper and works well in temperate climates and covered storage. Hypalon (CSM) resists UV, ozone and fuel far better and is the right choice for boats left uncovered in Mediterranean and Adriatic sun.

In practice: covered northern European use suits PVC; permanent southern mooring suits Hypalon.

• PVC — lighter, lower cost, 5–10 year practical tube life
• Hypalon — superior UV and heat resistance, 15+ year tube life

Choosing a size

Tender use is about the largest boat your davits and garage will accept. Day-boat use is about seating, sunbathing area and a console layout that keeps the helm dry.

• 2.6–3.2 m: two-person yacht tender, easy to lift and stow
• 3.4–4.2 m: family tender, comfortable for four adults with luggage
• 4.5–5.5 m: console day boat with real seating and weather protection
• 6 m and above: offshore capable, twin-console layouts, serious range

Resale value

Aluminium RIBs from established manufacturers hold value strongly on the European used market, because buyers know the hull survives hard use. A well-maintained aluminium tender commonly resells for a substantially higher share of its purchase price than the fibreglass equivalent of the same age.

Frequently asked questions

Do aluminium RIBs corrode in salt water?

Marine-grade aluminium alloys form a protective oxide layer and are coated and fitted with sacrificial anodes. With anodes replaced on schedule and fresh-water rinsing, corrosion is not a practical problem.

Is an aluminium RIB noisier than fibreglass?

Slightly, in short chop, though modern deep-V aluminium hulls with foam-filled decks and proper insulation are close to fibreglass in comfort.