Proper winterization is essential to protect your catamaran from freeze damage, corrosion, and deterioration during the off-season. Our comprehensive winterization program covers every system onboard, ensuring your vessel emerges in spring ready for commissioning with minimal work required.
Water System Draining & Flushing
Water left in plumbing during freezing temperatures can cause catastrophic damage to pipes, fittings, and tanks. Our thorough approach ensures every drop is removed or protected.
- Complete draining of freshwater tanks, lines, and hot water heaters
- Watermaker preservation with manufacturer-recommended storage solution
- Shower sump and drain pump clearing
- Head and holding tank system flushing and draining
- Bilge pump testing and bilge area cleaning
- All low points opened and drained to prevent trapped water
Antifreeze Treatment
For systems that cannot be fully drained, we use non-toxic, marine-grade propylene glycol antifreeze to prevent freeze damage throughout the vessel.
- Engine raw water cooling circuit antifreeze fill
- Generator cooling system protection
- All plumbing traps, drains, and P-traps treated
- Air conditioning seawater loops protected
- Toilet and head system antifreeze treatment
Engine & Generator Preservation
Engines and generators require special attention during extended storage periods to prevent corrosion, fuel degradation, and seal drying.
- Oil and filter change to remove acidic contaminants before storage
- Fuel system treatment with stabilizer to prevent diesel bug growth
- Fuel tank topping off to minimize condensation
- Exhaust system moisture protection
- Battery maintenance: disconnect, charge, and condition
- Fogging spray application to cylinders for internal corrosion prevention
- Belt inspection and tensioning for spring readiness
Sail & Canvas Storage
Sails, biminis, and canvas covers are significant investments that benefit greatly from proper off-season care.
- Sail removal, inspection, and cataloguing of any damage
- Cleaning and drying before folded storage
- Bimini, dodger, and cockpit enclosure removal
- Canvas cleaning, waterproofing treatment, and dry storage
- Running rigging inspection and lubrication
- Furling system inspection and servicing
Winter Covers & Shrink Wrapping
A quality winter cover or professional shrink wrap protects your catamaran from snow, ice, rain, and UV damage throughout the storage period.
- Custom-fitted shrink wrap with support framework
- Ventilation openings to prevent moisture buildup and mold
- Access doors for periodic inspection visits
- Snow load consideration in framework design
- Reusable custom cover installation where preferred
Securing for Storage
Whether your catamaran is stored ashore or afloat, proper securing is critical for preventing damage from weather events and environmental factors.
- Cradle or jack stand inspection and adjustment
- Through-hull valve inspection and closure
- Rudder and drive leg protection
- Bottom cleaning and antifouling assessment
- Dock line inspection and chafe protection
- Fender placement and securing
- Seacock management and monitoring plan
- Bilge pump and float switch testing
- Shore power connection verification

