Hull, deck, stringers and interior panels do not require the same core. PVC, balsa, PET, PU hybrid and honeycomb are selected for load, moisture and process targets.
Short answer
Marine-core selection is based on local loads, impact, water/moisture, joint details, curvature and infusion plan. Critical inserts and hardware require local high density or potting.
Why does it matter?
The wrong core affects not only weight but water-ingress risk, deck crushing, print-through and repair cost.
Selection by zone
Assess the boat structure by service zone.
- Hull: impact, slamming and curved geometry
- Deck: local compression and hardware loads
- Interior panel: low weight and surface finish
- Stringer/bulkhead: shear and joint details
Moisture and edge details
Seal cut edges, holes and hardware zones; plan cell filling/potting for open-cell structures.
Frequently asked questions
Is balsa risky in boats?
It can deliver high mechanical performance with correct resin sealing and edge/hole details; water-ingress control is essential.
Should one PVC density be used everywhere?
No. Hardware and high local loads may require denser inserts or core.
Conclusion and technical support
Review marine PVC, balsa and process options in our boat/yacht materials guide.
Sources
- https://www.denizticaretodasi.org.tr/
- /assets/uploads/catalogs/co-balsa-150-tds.pdf