Keeping Your Boat Fresh Over Winter

Whether you’re storing your boat for the winter or just not using it for a while, it’s crucial to prevent mould and mildew, which can damage and stain your upholstery and other parts. Here’s how to keep your boat fresh during periods of inactivity.

Why Do Boats Get Mould and Mildew?
Mould and mildew are typically caused by moisture in the air condensing into water droplets, creating a perfect environment for bacteria to grow. While moisture in the air isn’t much of an issue during the warmer months when boats are frequently used, colder air holds less moisture. This leads to increased condensation during winter and cold evenings, providing an ideal breeding ground for mould and mildew, which can damage furnishings, wood, electronics, and result in a lot of cleaning when the season starts again.

How Can We Prevent This?

Ventilation: Providing ventilation to areas prone to mould can be challenging on boats, as they are designed to be well-sealed to keep air and water out. Leaving windows and hatches open isn’t always practical due to rain and security concerns. However, Dorade or mushroom vents can usually be left open as they don’t let rain in directly.
Heating: Using small tube heaters or a frost heater can help by keeping the air warm, which allows it to hold more moisture and prevents condensation on surfaces. While heating can prevent mould and mildew, it can be costly due to poor insulation on boats.
Dehumidifiers: Using a dehumidifier is another effective method to control moisture levels inside the boat.

Additional Tips to Prevent Mould and Mildew

Check for Leaks: Inspect pipework and window seals for leaks that could introduce moisture into the boat.
Air Circulation: Mould often forms in areas with poor air circulation, such as cupboards or narrow gaps. Keep cupboards, fridges, and lockers open to allow air to circulate, and install vents where possible.
Remove Soft Furnishings: Consider storing soft furnishings at home rather than on the boat to keep them mould-free. Avoid unheated garages as they aren’t much better than leaving them on the boat.
Avoid Using Gas Cookers for Heating: Gas cookers produce moisture when they burn. Instead, use an electric fan heater, frost heater, or oil-filled radiator for warmth during winter visits (always prioritize safety and never leave heaters unattended).
Use Anti-Mould Products: Products like Tea Tree oil, which is naturally antiseptic and anti-microbial, can help prevent mould spores. The August Race Boat Bomb is also recommended as it coats the interior with an anti-bacterial formula, preventing mould on all surfaces