Key Takeaways -

• Waterproofing outdoor storage boxes protects belongings from weather damage.
• Use materials like varnish, felt, and rubber weather stripping for effective waterproofing.
• Regularly inspect and maintain your storage box to ensure continued protection.
• Properly waterproofed storage boxes are versatile for use in your house, garden, or garage.

Waterproofing outdoor storage boxes is essential to protect your belongings from rain, snow, and other elements. Without it, your items can get damaged, leading to unnecessary costs.

We will cover the key methods and materials needed to waterproof your storage box. You’ll learn simple techniques like using marine varnish, rubber weather stripping, and waterproof linings, with easy steps for applying them.

By following these tips, you can keep your storage box and its contents dry and in good condition. Read on to find out how to ensure your outdoor storage box stays protected and lasts longer.

Preparing the Storage Box

Cleaning the Box

Start by removing all items from your storage box to ensure it’s empty and easy to work with. Next, clean both the inside and outside surfaces using mild soap and water. This helps to remove any dirt, dust, or debris that could affect the waterproofing process.

Make sure to scrub thoroughly, especially in corners and crevices. Rinse the box well to remove all soap residue. After cleaning, allow the box to dry completely. It’s important to ensure there is no moisture left, as this can interfere with the waterproofing materials.

Inspecting for Damage

Carefully inspect your storage box for any signs of damage, such as cracks, holes, or structural weaknesses. Pay close attention to the corners, edges, and joints where damage is most likely to occur. If you find any issues, repair them before you start waterproofing.

This might involve using wood filler to seal cracks, glue to fix loose parts, or even replacing damaged sections.

Properly repairing any damage ensures that the waterproofing materials can be applied smoothly and effectively, providing the best protection for your storage box and its contents.

Waterproofing Using Varnish

Materials Needed

To waterproof your storage box using varnish, you will need the following materials:

• Marine varnish
• Paint thinner
• Paintbrushes
• Sandpaper (180-grit and 220-grit)
• Tack cloth

Step-by-Step Process

To effectively waterproof your storage box using varnish, follow these steps:

1. Sanding the Wooden Box: Begin by smoothing the surface of your storage box with 180-grit sandpaper. This prepares the wood for varnish application by removing any rough spots. After sanding, use a tack cloth to remove all dust and debris, ensuring a clean surface for varnishing.
2. Applying the First Coat of Varnish: Mix the marine varnish with paint thinner in a 10:1 ratio. This thinned varnish will seep into the wood and create a strong base. Apply a thin, even coat using a paintbrush. Let it dry for 8-16 hours, depending on the varnish brand.
3. Sanding Between Coats: Once the first coat is dry, lightly sand the surface with 220-grit sandpaper. This helps to remove any imperfections and ensures a smooth finish. Clean the surface again with a tack cloth to remove any dust.
4. Applying Additional Coats: Apply full-strength varnish for the subsequent coats. Repeat the process of sanding and cleaning between each coat. For best results, apply at least three coats of varnish. This will provide a durable, waterproof finish that protects your storage box from the elements.

Waterproofing Using Felt and Clout Nails

Materials Needed

To waterproof your storage box using felt and clout nails, you will need:

• Felt
• Clout nails (13mm)
• Hammer

Step-by-Step Process

To waterproof your storage box using felt and clout nails, follow these steps:

1. Cutting the Felt: Start by measuring the dimensions of your storage box. Cut the felt, allowing for a 50mm overlap on all sides. This extra material will help ensure a secure, waterproof fit.
2. Attaching the Felt: Lay the cut felt over your storage box, ensuring it covers all sides with the overlap. Use clout nails to secure the felt by hammering them down along the edges. For a neat finish, either add trim around the edges or tuck the felt under itself. This will create straight lines and enhance the box’s appearance while ensuring it remains waterproof.

Waterproofing Using Rubber Weather Stripping

Materials Needed

To waterproof your storage box using rubber weather stripping, you will need:

• Rubber weather stripping
• Adhesive

Step-by-Step Process

To waterproof your storage box using rubber weather stripping, follow these steps:

1. Measuring and Cutting Stripping: Start by measuring the lid and frame of your storage box to determine the length of rubber weather stripping needed. Cut the stripping to fit these measurements accurately, ensuring a snug fit for effective waterproofing.
2. Attaching the Stripping: Apply a generous amount of adhesive to one side of the rubber weather stripping. Carefully attach the stripping to the inside edge of the lid or the frame of your storage box. Press firmly to ensure it adheres well and creates a tight seal. This will help keep water out and protect the contents of your storage box (1).

Maintenance Tips

Regularly Check and Reapply Waterproofing as Needed

Inspect your storage box frequently to ensure the waterproofing remains intact. Look for signs of wear, such as peeling varnish, loose felt, or gaps in the rubber weather stripping. If you notice any issues, reapply the waterproofing materials promptly.

This will maintain the box's protective qualities and prevent water damage to the contents.

Keep the Box in a Shaded Area to Reduce UV Damage

UV rays can degrade the materials of your storage box over time, causing them to weaken and fade. To extend its lifespan, place the box in a shaded area, such as under a tree or a covered patio.

This will help lessen UV damage and keep the box looking good and functioning well for a longer period.

Clean the Box Periodically to Remove Dirt and Debris

Regular cleaning is essential to maintain the appearance and functionality of your storage box. Remove dirt, leaves, and other debris from the surface using a soft brush or cloth.

Cleaning the box not only improves its appearance but also ensures that the waterproofing materials can work effectively. Dirt and debris can trap moisture, which can compromise the waterproofing and lead to damage.

Frequently Asked Questions

Is a Watertight Seal Necessary for a Waterproofing Job to Be Effective?

Yes, a watertight seal is crucial for effective waterproofing. It ensures that no water can penetrate the storage box, keeping the contents dry. Without a proper seal, even small gaps can allow moisture to enter, defeating the purpose of waterproofing.

Does a Waterproof Outdoor Storage Box Also Mean Water-Resistant?

Yes, a waterproof outdoor storage box is also water-resistant. Waterproofing implies that the box can withstand significant exposure to water without letting it in.

However, being water-resistant suggests that the box can repel water to a certain extent but may not be completely impervious under heavy or prolonged exposure.

Can I Do the Same Process with a Garden Storage Bench?

Yes, you can apply the same waterproofing process to a garden storage bench. The techniques used for sealing and protecting a storage box are equally effective for a storage bench. Ensure you follow the steps carefully to maintain the bench's durability and protect its contents.

Is a Plastic Storage Box Also Waterproof?

Plastic storage boxes are generally water-resistant, but not all are completely waterproof. While they can repel water and keep out moisture to some extent, they may not provide a full watertight seal.

It’s important to check the specifications of the plastic storage box to determine its level of waterproofing.

Conclusion

Waterproofing your outdoor storage box is essential to protect your belongings from the elements. By using methods like varnish, felt, and rubber weather stripping, you can ensure your box remains durable and effective.

Regular maintenance, including reapplying waterproofing and keeping the box clean, will extend its lifespan. Whether you store it in your house, use it to save space in your garden, or keep it in the garage, a properly waterproofed storage box will keep your items safe and dry.

Sources -

1. https://www.rapidracking.com/blog/how-to-make-an-outdoor-storage-box/