Winter is the perfect time to properly prepare your boat. By winterizing your boat, you'll prevent frost damage, moisture problems, and high repair costs in the spring. This article provides a complete checklist and a practical step-by-step plan for using antifreeze in the engine, pipes, and toilet.
Why winterize your boat?
Properly caring for your boat during the winter prevents expensive repairs. Think of engine damage due to freezing, osmosis caused by moisture in the hull, or mold growth in the cabin. A few hours of work in the fall will save you a lot of time and money in the new season.
Complete checklist
- Clean the hull and deck: remove dirt and grime to prevent mold.
- Check for damage: touch up scratches and bubbles with maintenance and paint products .
- Engine maintenance: change oil/filters and fill with antifreeze to prevent frost damage.
- Pipes & tanks: empty drinking water and pipes or flush with antifreeze .
- Batteries: Remove, charge and store in a dry, frost-free place.
- Ventilation: place dehumidifiers in cabin/storage areas to prevent condensation.
- Movable parts: lubricate cables, locks and hinges with grease/spray.
- Sails & cushions: store dry/clean to prevent mold.
Step-by-step plan: antifreeze
Protect the engine, drinking water systems, and toilet with antifreeze. Follow these steps:
- Close the system shut-off valve.
- Open the seaweed trap (a seaweed trap key may help).
- Start the engine.
- Add until colored fluid comes out of the outlet — all lines are now filled.
- Clean the cap of the weed pot and close it tightly.
For drinking water and toilet: continue pumping until the system is full. Antifreeze is non-toxic; simply emptying and flushing the pipes in the spring is sufficient. If necessary, see our antifreeze products .
Maintenance & paint
Winter is ideal for larger and smaller jobs:
- Antifouling: prevent fouling with antifouling & underwater coatings .
- Restore hull and deck: Use maintenance and paint products for restoration and protection.
- Woodwork: lacquer/oil/varnish for moisture and UV protection.
- Minor repairs: Touch up cracks and scratches now to prevent larger damage.
Storage and covering
- On shore: maximum protection, maintenance is easier.
- In the water: ensure the engine/pipes are protected with antifreeze and covered well.
- Cover: Use a breathable winter cover to allow moisture to escape.
- Check: Check periodically that the cover is properly fitted and that no water has accumulated.
Frequently Asked Questions
Should I always use antifreeze?
Yes. Antifreeze prevents freezing and damage to the engine, pipes, and toilet. Tip: choose the right type/color and follow the steps.
Can I also leave my boat in the water in winter?
That's possible, provided you protect your pipes/engine with antifreeze and cover the boat properly. Regularly check for leaks, ice formation, and sail tension.
What paint do I use for small repairs?
Choose a suitable boat paint for each substrate (polyester, wood, steel). Follow the application instructions and allow sufficient curing time.