Worker inspecting shipping containers outdoors – visual safety check of used Conex boxes by Container Sales Group

Spring Maintenance Tips to Extend the Life of Your Conex Container

Spring is the ideal time to check in on your conex or shipping container. Whether you’re using it for storage, construction, or business, a seasonal inspection can help prevent costly repairs and extend the life of your container.

Whether you own a 20 ft. or 40 ft. container or are just learning how to care for one, these tips will help you keep your investment in top shape all year round.

1. Inspect the Container Roof for Standing Water and Debris

After months of snow or rain, the first thing to check is the roof of your shipping container. Even though conex containers are made from heavy-duty Corten steel, standing water and wet debris can lead to premature rusting—especially if left unchecked.

Use a broom or leaf blower to clear off any leaves, branches, or buildup. If your container is used for long-term storage, make this part of your seasonal maintenance routine.

Explore our full line of used shipping containers for durable storage options.

2. Examine Doors and Seals for Proper Function

Spring is a great time to test the door function on your storage container. Open and close both doors to make sure the hinges, lock rods, and gaskets are working smoothly. Lubricate door hinges and inspect the rubber seals for signs of wear, cracking, or gaps. Keeping your doors in good condition ensures your items stay protected from moisture and pests.

Need a replacement or looking to upgrade? Check out our container accessories and security options.

3. Check the Flooring for Moisture or Rot

Most conex containers are built with marine-grade plywood floors, but that doesn’t mean they’re immune to damage. Sweep out your container, check for soft spots, and look for signs of moisture intrusion or pests. If your container is placed directly on the ground, you might want to consider lifting it slightly using blocks to help promote air circulation underneath.

4. Touch Up Paint and Surface Rust

Spring is also a good time to visually inspect your container’s exterior for any surface rust or scratches. Use a wire brush or sandpaper to remove rust spots, then touch up with container-grade paint. This is especially important if you’re in a humid or coastal climate where steel is more susceptible to corrosion.

Learn more about how to paint your shipping container and increase its lifespan.

5. Confirm Ventilation Is Working

Proper ventilation is essential for reducing condensation inside the container—especially in spring when humidity increases. Make sure your container’s built-in vents aren’t blocked and are functioning as intended. For additional protection, you can add desiccant bags or consider installing extra vents to improve airflow.

Protect Your Investment with Seasonal Maintenance

Routine maintenance is a simple but powerful way to protect your shipping container investment. Whether you’re using a container for personal storage, job site equipment, or custom modifications, a little care each season goes a long way.

Still looking for the right container? Browse our inventory of new one-trip containers or request a quote here.

Have Questions? We’re Here to Help.

Since 1998, Container Sales Group has been the go-to wholesale provider for businesses, first responders, schools, and homeowners, From helping fire departments find custom training units to delivering storage containers to backyards and job sites, we offer honest guidance, competitive pricing, and unmatched reliability.

Call us today at 888-320-5938 or request a quick quote to get the right container for your project—delivered on time, at the right price.

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Container Sales Group buys containers directly from the steamship lines to offer our customers the highest quality containers at the most competitive prices. We’re a women-owned business, established in 1998, and have locations throughout the US.