What We Build
Full-service yacht construction and marine FRP fabrication for vessels up to 80 feet
Vessel Types
We build a range of vessel types, from bluewater cruisers to commercial work boats
Sailing Catamarans
Our core expertise. Over 60 vessels of the Antares 44 produced. Multihull construction from 35 to 60+ feet with vacuum infusion and foam core sandwich techniques.
Sailing Monohulls
Custom one-off and short-run production monohulls. We work with your naval architect to execute builds in fiberglass, carbon, or composite construction.
Power Catamarans
Power catamaran hulls and complete vessels. Efficient hull forms with full systems integration including propulsion, electrical, and interior fit-out.
Power Monohulls
Single-hull power vessels for cruising, fishing, or commercial use. FRP construction with full outfitting capabilities.
Work Boats
Commercial and utility vessels built to specification. Durable FRP construction suited for demanding operational environments.
Size Range: Up to 80 Feet
Our facility and team are equipped to build vessels from approximately 30 feet to 80 feet (9 to 24 meters). Most of our production experience is in the 40–50 foot range, but we have the floor space, tooling capacity, and structural engineering capability for larger projects.
For vessels above 60 feet, we typically work in close collaboration with the naval architect's office to manage structural engineering, weight studies, and build sequencing.
Services
New Construction
Complete builds from bare mold to sea trials. We handle lamination, structural assembly, systems installation, joinery, painting, rigging, and commissioning.
Production Runs
Series production for established brands. Consistent quality across multiple units with documented processes and quality control checkpoints.
One-Off Builds
Custom vessels built to your specifications. We work with your design team to produce a single unique vessel from concept to delivery.
Refits & Repairs
Structural repairs, osmosis treatment, repainting, systems upgrades, and major refits. Fiberglass, mechanical, electrical, and joinery work — all in-house.
Marine FRP Fabrication
Custom fiberglass components, structural parts, and assemblies. Vacuum infusion, hand layup, foam core sandwich, and post-cure — all on-site.
Full Project Management
We handle procurement of all materials and equipment, international logistics, customs clearance, and delivery coordination. Our clients don't need to worry about sourcing — we manage the entire supply chain from raw materials to finished vessel.
Construction Methods
We employ modern composite construction techniques suited to each project's requirements
Vacuum Infusion
Adopted in 2023 for hull and deck lamination. Produces higher fiber-to-resin ratios, consistent laminate quality, and lighter, stronger structures compared to hand layup.
Hand Layup
Traditional wet layup for specific components and smaller parts where vacuum infusion is not practical. Our laminators have 14+ years of experience.
Foam Core Sandwich
Corecell and similar foam cores for stiff, lightweight panels. Used extensively in hull sides, decks, and structural bulkheads.
Solid Laminate
High-density solid fiberglass for keels, high-load areas, and structural joints where maximum strength is required.
Post-Cure
Controlled post-cure cycles to achieve full resin cross-linking and maximum mechanical properties in critical structural components.
CNC Cutting
Computer-controlled cutting for foam cores, plywood structural components, and templates. Ensures precision and repeatability across production runs.
Materials
E-Glass
Standard structural fiberglass for hulls, decks, and components. Available in various weights and weave patterns.
Carbon Fiber
High-performance reinforcement for weight-critical and high-load applications. Used in structural members, masts, and custom components.
Kevlar
Impact-resistant aramid fiber for keel areas, bow sections, and high-abrasion zones. Excellent energy absorption properties.
Vinylester Resins
Primary laminating resin offering excellent osmosis resistance, mechanical properties, and compatibility with vacuum infusion.
Epoxy Resins
Premium resin systems for structural bonding, high-performance laminates, and applications requiring maximum adhesion and strength.
Corecell Foam
Closed-cell SAN foam core for sandwich construction. Excellent shear strength, fatigue resistance, and compatibility with infusion processes.
Marine Plywood
Structural plywood for bulkheads, furniture substrates, and interior framing. Integrated with FRP structures using secondary bonding.
Systems Integration
We install and commission complete vessel systems in-house
Electrical
Complete DC and AC electrical systems: 12V, 24V, and 48V configurations. Lithium battery banks, inverters, solar, wind generation, and full panel wiring.
Plumbing
Freshwater, black water, gray water, and raw water systems. Watermakers, pumps, tanks, and through-hull fittings.
HVAC
Marine air conditioning and heating systems. Reverse-cycle units, ducting, and climate control for all accommodation spaces.
Propulsion
Diesel, hybrid diesel-electric, and electric propulsion configurations. Engine installation, shaft alignment, prop sizing, and sea trial commissioning.
Hydraulic Steering
Hydraulic steering systems installation and setup. Rudder bearings, hydraulic rams, autopilot integration, and helm station configuration.
Rigging
Standing and running rigging for sailing vessels. Mast stepping, stay tensioning, winch installation, and deck hardware.
Certifications & Standards
Following European and North American standards, we have successfully exported all of our products for over two decades. We are committed to producing and delivering vessels that meet international certifications and regulations.
IMCI
International Marine Certification Institute
USCG
US Coast Guard
Canadian Coast Guard
Canadian Coast Guard compliance
ABYC
ABYC Certified Technicians
NMMA
National Marine Manufacturers Association
ISO
ISO Standards Compliance
Collaboration with Germán Frers
40 Grados Sur has built powerboats designed by internationally renowned naval architect Germán Frers — the Milonga 35 series, all exported to the United States. This collaboration reflects our ability to execute designs from world-class architects at the highest level of quality.
Certifications & Standards
Following European and North American standards, we have successfully exported all of our products for over two decades. We are committed to producing and delivering vessels that meet international certifications and regulations.
IMCI
International Marine Certification Institute
USCG
US Coast Guard
Canadian Coast Guard
Transport Canada marine safety standards
ABYC
Certified Technicians — American Boat & Yacht Council
NMMA
National Marine Manufacturers Association
ISO
International Standards Organization compliance
Working with World-Class Designers
40 Grados Sur has built boats designed by Germán Frers, one of the most renowned naval architects in the world. The Milonga 35 powerboats, designed by Frers and built at our factory, were exported to the United States.
This collaboration exemplifies our ability to execute designs from top-tier naval architects to the highest standards of construction quality.
Frequently Asked Questions
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