If you’ve left your boat moored on Windermere for a few months, you might have noticed an unwelcome sight—a green layer of algae and grime covering the hull. This is a common issue on inland waters, particularly in freshwater lakes where algae thrive. But don’t worry—there are effective ways to prevent and combat this problem.
Why Does Your Boat Turn Green?
Windermere’s nutrient-rich waters provide the perfect conditions for algae growth, especially in warmer months. Lack of movement, moisture, and UV exposure also contribute to the build-up of green slime, particularly on boats that are left unattended.
How to Prevent Algae and Grime Build-Up
1. Regular Cleaning and Maintenance 🧼
Wash the boat’s hull every few weeks with freshwater to remove algae before it hardens.
Use a soft brush or sponge with mild soap to avoid damaging the gel coat.
Invest in a biodegradable boat cleaner that removes algae without harming the lake.
2. Apply Antifouling Paint 🎨
For boats that remain in the water for long periods, applying antifouling paint can slow down algae growth.
Freshwater antifouling coatings are different from saltwater ones—choose a paint designed for inland waters.
Reapply every one to two years for best results.
3. Keep Your Boat Moving ⛵
Boats that are frequently used tend to accumulate less algae. Regular movement disturbs algae growth.
If you can’t sail often, consider running the engine or taking short trips to help keep the hull clear.
4. Use a Boat Cover ⛺
A full boat cover or even a simple hull wrap can protect against algae, moisture, and UV damage.
Ensure the cover is breathable to prevent condensation buildup.
5. Lift or Dry Store Your Boat 🏗️
If you’re not using your boat for extended periods, consider lifting it out of the water.
Floating docks or dry stack storage are great options to keep the hull clean and reduce maintenance.
6. Try Environmentally Friendly Algae Repellents 🌱
Some products contain natural enzymes that break down algae without polluting the water.
Copper-infused hull protectors can also help prevent build-up.
Dealing with a Boat That’s Already Green?
If your boat is already covered in algae, don’t panic! Here’s what to do:✔️ Use a high-pressure hose to remove loose algae.✔️ Scrub with a vinegar-water mix or an eco-friendly hull cleaner.✔️ For stubborn build-up, try a marine-grade algae remover.✔️ Rinse thoroughly and consider applying a protective wax to make future cleaning easier.✔️ Call Windermere Yacht Services and then put your feet up.
Note: Seagull breeding season Late March - May
In addition to the boat developing a green layer from algae, another risk of leaving it uncleaned and unattended is the possibility of seagulls nesting on your deck. While they can be a nuisance, seagulls are protected by law, and once they begin building a nest or it becomes active, it is an offence to interfere with or disturb it. This can lead to significant complications for boat owners including:
Legal consequences if the nest is disturbed
Aggressive behaviour from the Sea Guls
Health and Safety Issues
In Summary 💡
A green hull may be common on Windermere, but with regular maintenance, antifouling protection, and proper storage, you can keep your boat looking fresh all year round. Whether you sail regularly or leave your boat moored for months, a little care goes a long way in keeping it clean and algae-free.
Need professional yacht care? Windermere Yacht Services offers expert cleaning, maintenance, and antifouling treatments to keep your boat in top condition.
Get in touch today!
📧 admin@windermereyachtservices.com | 📱 015394 555 08
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