maintenance · hull
What Actually Happens If You Skip Hull Maintenance
· By Daniel Garcia
Some boat owners put off hull cleanings. Here's what happens over 3, 6, and 12 months of neglect in Victoria waters.
Hull cleaning is an easy line item to skip. Here's what sits under boats that do — at 3, 6, and 12 months.
After 1-2 months (summer)
Light slime and algae film. Easy to clean off. Might not even notice a performance difference yet. This is the ideal time to clean — quick, easy, cheap.
After 3-4 months
Barnacles are establishing. Small ones at first, but they're setting up shop. You'll start to notice your boat feels sluggish and fuel consumption goes up. Still cleanable without too much hassle, but it's more work than a light clean.
After 6+ months
Now you've got a real garden growing under there. Heavy barnacle coverage, possibly tube worms, mussels, and thick algae. Fuel efficiency can drop 20-30% or more. Your boat is noticeably slower.
Cleaning heavy growth is harder on your antifouling paint. Barnacles root into the paint, and removing them pulls paint off with them. You might be looking at an early haul-out and repaint.
After a year
At this point you likely need a haul-out. The growth is heavy, the paint is damaged or gone in spots, and there may be damage to through-hulls or other fittings that have been covered in growth.
A haul-out, bottom paint, and related work can easily cost several thousand dollars. Regular hull cleanings throughout the year cost a fraction of that.
The bottom line
Regular maintenance is boring but it saves real money. A clean hull burns less fuel, goes faster, and the paint lasts longer. Skip it and you pay more later. That's just how it works.