Covering Aluminum Boats: Diy Guide For Boat Owners

Aluminium boats are popular for fishing and hunting because they are lightweight and durable. However, they need to be protected from the elements when not in use. There are several ways to cover an aluminium boat yourself, from using a cheap cover from a hardware store to building a wooden A-frame and covering it with a heavy-duty tarp. If you're feeling adventurous, you could even try painting your aluminium boat yourself, though this can be tricky if you're not experienced.

Choosing the right fabric for an aluminium boat cover

Aluminium boats are popular for hunting and fishing due to their lightweight and durable nature. When it comes to choosing the right fabric to cover your aluminium boat, there are several materials available in the market, each with its own advantages. Here are some factors to consider when selecting the right fabric for your aluminium boat cover:

Polyester

Polyester is a durable and versatile synthetic fabric that serves as an excellent choice for boat covers. It offers effective protection against ultraviolet (UV) rays, preventing fading, deterioration, and damage to your boat's surface. Polyester is also weather-resilient, providing a reliable barrier against rain, snow, and other harsh elements. Additionally, it is breathable, allowing air circulation and preventing moisture buildup, which helps inhibit the growth of mould and mildew. Its ease of maintenance, abrasion resistance, and longevity make polyester a popular option for boat covers.

Canvas

Canvas is a traditional and well-known fabric for boat covers, recognised for its inherent strength and durability. It can withstand various environmental factors such as wind, rain, and UV exposure. While canvas may not be entirely waterproof, its tight fibre weave provides natural water resistance, shielding your boat from light rain and moisture. Canvas covers offer breathability and can be customised to fit the specific dimensions and contours of your boat, ensuring a snug and secure fit. Repairs are often possible for canvas covers, making them a cost-effective choice.

Vinyl

Vinyl stands out for its inherent waterproof properties, creating an effective barrier against water, rain, snow, and even splashes. It also offers high resistance to UV rays, preventing sun damage, fading, cracking, and deterioration of your boat's surfaces. Vinyl is a durable material that can withstand abrasion and friction during transport or storage. Its heavyweight nature adds stability, preventing the cover from flapping in adverse weather conditions. Vinyl is a preferred choice for winter storage due to its ability to withstand cold temperatures.

Poly-Cotton Blend

Poly-cotton blends combine the strengths of polyester and cotton fibres, resulting in a balanced fabric. Polyester contributes durability and resistance to the environment, while cotton adds breathability and a softer feel. This blend is known for its versatility, offering protection against UV rays and maintaining breathability in humid or damp climates. The presence of cotton provides a comfortable touch, making it appealing to boaters who want both performance and a pleasant tactile experience.

Acrylic

Acrylic is renowned for its rich and vibrant colours, adding elegance and style to your boat. It exhibits exceptional resistance to fading, ensuring that your boat cover maintains its vibrant appearance even under prolonged sun exposure. Acrylic is inherently UV-resistant and resistant to mould and mildew growth, contributing to the overall durability and cleanliness of the cover. It is relatively easy to maintain, requiring only mild soap and water for cleaning. Acrylic covers provide a soft and comfortable feel, making them a preferred choice for boat owners who prioritise aesthetics and performance.

Preparing the aluminium surface for painting

Step 1: Elevate the Boat

Firstly, it is recommended to elevate the boat to a comfortable working height. This can be done using two sawhorses to support the boat, with the inside of the boat facing upwards. This will make it easier to work on the boat compared to having it on the ground.

Step 2: Sand the Boat

The next step is to sand the boat thoroughly. Use a sander, which can be a block of wood with sandpaper or a handheld electric sander. If there was old carpet inside the boat, be sure to sand away all the glue to ensure the paint adheres properly. If the boat has a painted interior, use 80-grit sandpaper to scuff up the aluminium. For bare aluminium, you can use 40-grit sandpaper to rough it up aggressively.

Step 3: Clean the Boat

Once the sanding is complete, it is time to clean the boat thoroughly. Fill a bucket with soapy water and use a stiff-bristled brush to scrub the boat, ensuring that all debris from the sanding process is removed. Then, use a power spray nozzle to rinse the boat completely and allow it to air dry.

Step 4: Prepare the Work Area

Before beginning the painting process, it is important to prepare the area around the boat. Lay down paper or plastic on the floor of your work area to protect it from paint. Remove or cover any items that could be damaged by the paint. If you are working indoors, ensure proper ventilation by opening windows and using an electric fan. Don't forget to use a respirator for your safety.

Step 5: Remove Old Paint

If there is old, faded, or flaking paint on the aluminium surface, it is essential to remove it before proceeding. One method is to use a chemical paint stripper to soften the paint and then scrape it away, but this can be a slow and smelly process. A more effective alternative is garnet abrasive blasting, which is less coarse than sandblasting and won't compromise the thin aluminium surface.

Step 6: Degrease and Blast the Surface

To prepare bare aluminium for painting, start by degreasing the surface with a suitable solvent and clean cloths, replacing the cloths regularly to prevent recontamination. Then, blast the aluminium surface with garnet to remove any imperfections and oxidisation. The result should be a nice, shiny, gleaming aluminium surface.

Using a primer for painting aluminium boats

Aluminium boats are a popular choice for fishing and hunting because of their lightweight and durable nature. Painting an aluminium boat can be tricky if you aren't experienced, but it can be done successfully with the right preparation.

Before you begin to prime the aluminium, you must ensure the surface is clean. Sand the boat completely, removing any old glue or carpet residue, as this could stop the paint from adhering. After sanding, wash the boat with soapy water and a stiff-bristled brush, then rinse with a power spray nozzle and allow it to air dry.

Now you are ready to prime the aluminium. When using a product like Durabak, you can use either a metal self-etch primer that is compatible with polyurethane, such as Zinc Chromate, or a specific primer like Metcote. If you are not using Durabak, you can use an oil-based primer and paint thinner. Mix a pint of paint thinner into a gallon of primer to help it get into the small cracks of the boat. Use a paint sprayer, brush, or roller to apply the primer. Spray or paint one side, allow it to dry, and then turn the boat over to do the other side. Allow the primer to dry for several hours before painting.

Using a tarp to cover an aluminium boat

Tarps are a good way to cover your aluminium boat when storing it. They protect your boat from vandals, thieves, sun rays, dirt, leaves, debris, birds, and other animals.

When choosing a tarp, make sure it is large enough to cover the entire length and width of the boat, with some extra material to ensure complete coverage. Heavy-duty tarps made from materials like polyethylene or canvas offer the best protection. It should also have a secure fastening system to keep it in place during strong winds.

Before placing the tarp, pad sharp edges with towels, carpet remnants, or something else soft to reduce the chance of puncturing the tarp. Avoid using adhesive tape to fasten padding, as it may leave a residue if exposed to the sun.

When placing the tarp, drape it to allow water to flow to its edge. Low spots in the tarp will collect water, which can degrade the tarp's waterproofing and lead to leakage. You can position several rubber-capped telescopic poles in the interior of the boat and drape the tarp over the poles.

To secure the tarp, look for tarps with sewn-in grommets around the perimeter. Fasten cordage to them and secure the other end to a heavy weight or fixed object. You can also use webbed tie-down straps with quick-release fasteners or rope ratchet devices (but be cautious as these can apply excessive force and loosen or tear out grommets).

Regularly inspect and maintain your boat cover to protect its serviceability. At least once a month, look for any tears, rips, holes, or other signs of degradation, especially over sharp edges. Ensure the tarp is still securely fastened and that low spots are minimised.

Tips for storing an aluminium boat outside in winter

Storing your aluminium boat outside during winter can be a challenge, but with the right preparation, you can keep it safe and secure until the warmer months. Here are some tips to help you store your boat effectively:

Protect Your Boat from Water Damage

Firstly, ensure your boat is protected from water damage. While it may seem ironic to shield something designed to operate on water from water, it is crucial to prevent water from remaining in the boat. For smaller boats, simply empty and turn them upside down. For larger boats or those with fixed electronics, consider using a cover.

Use a Cover or Tarp

If you decide to use a cover, a custom-fitting cover with elastic sides or cinching lines is ideal. However, if you're looking for a DIY option, you can use a standard tarp. To prevent water from pooling, create a tent-like structure by placing an item, such as a lawn chair, in the middle of the boat. Secure the tarp by tying it down or weighing it with items like water jugs.

Protect Your Boat's Battery

Before fully securing your boat, remember to remove the batteries and recharge them periodically throughout the winter.

Prevent Wildlife Intrusion

Depending on where you store your boat, take measures to prevent wildlife, such as mice, from entering and causing damage.

Keep Your Boat Accessible

When storing your boat outside, be careful not to secure it too tightly or tuck it away in a corner. You want to strike a balance between protection and accessibility so that you can easily access your boat when the weather improves.

Prepare the Tires

If you're storing your boat on a trailer, consider placing the trailer on blocks to protect the tires from damage. Alternatively, you can jack up the entire trailer and place it on jack stands.

Drain the Lower Units

Before storage, be sure to lower the motor completely to drain all water from the lower units. You can also add RV antifreeze to the livewells to prevent any remaining water from freezing and causing damage.

Cover the Motor

To protect your motor from the elements, cover it with a heavy-duty garbage bag. Cut a slot in the bottom of the bag to allow any water that enters to drain out, preventing frost action on the lower unit seals.

Keep the Bow Elevated

When covering your boat, tilt it slightly with the bow raised. This will ensure that any rain or moisture can drain out if the temperature is above freezing.

Build a Wooden Frame

If you live in an area with heavy snowfall, consider building a wooden frame over your boat to prevent snow from piling up and putting excessive weight on the cover or tarp.

Circulate Air

While it's important to keep your boat dry, ensure there is some airflow to prevent moisture buildup. Leave some openings in your covering structure to allow for ventilation.

Protect the Interior

If your boat has electronics or other sensitive equipment, consider removing them and storing them indoors if possible. If not, ensure they are securely covered and protected from the elements.

By following these tips, you can effectively store your aluminium boat outside during the winter months, ensuring it remains in good condition and ready for use when the warmer weather arrives.

Frequently asked questions