How Secure Is A Shipping Container?

If you’re planning to buy or hire a shipping container for storage or to convert into a workspace, then security is likely to be one of your earliest considerations. Those solid steel walls and heavy locking doors certainly look reassuring; but how secure is a shipping container in practice? More importantly, what can you do to improve security once it’s on-site?

At Upminster Containers we’ve supplied containers to homes, schools, farms, construction sites and businesses for decades. The guide below explains what type of security measures a shipping container comes with, where the common weak points are as well as the practical upgrades and habits that can improve its overall security.

Security As Standard

A shipping container is already a significant step-up from most garden or site storage options and comes with some built-in advantages:

• Steel Construction: The walls, roof and doors are made from heavy-gauge steel which has been welded into a rigid frame. This makes casual break-ins far harder than with wood sheds or lightly-constructed outbuildings.
• Doors With Locking Bars: Vertical bars clamp the doors closed at multiple points.
• Weather-Resistant Build: Designed to withstand the unpredictable nature of the sea, all shipping containers are designed as-standard to stay dry and protect contents from the elements.

Where Containers Can Be Vulnerable

Understanding where the weak points are on your shipping container can help understand how secure is a shipping container. Each of the below can be addressed with simple security measures:

Upgrade Padlocks

• Padlock Protection: At Upminster Containers, our NEW containers come with a lock box as standard. For units from other providers there are a few options, including a padlock protector. This is a welded steel ‘house’ that goes around your padlock and is one of the most effective and low-cost upgrades. Using this can help to shield padlocks from bolt cutters and prizing (crow-bars).

Maintenance

• Check The Doors: Check, clean and lubricate the locking bars regularly to ensure that the doors open and close fully and sit flush against the seals.
• Replace Old Seals: Good seals don’t just keep water out; they remove leverage points around the edges. If your seals are looking a little worse for wear, it’s essential that these are replaced quickly.

Positioning

• Even Out The Base: Set the container on a flat base or concrete pads to make sure that settlement doesn’t cause the doors to open or close at an angle
• Keep An Eye Out: Position the unit where it’s visible from occupied areas or CCTV, not behind overgrown hedges or stacked pallets. Thieves can unfortunately play the long game and wait for a prime opportunity to arise before striking, always be vigilant
• Lighting: A motion-activated floodlight is a major deterrent.

Limiting Visibility

• Avoid ‘Advertising’ Contents: No signage suggesting high-value items inside.
• Organise Contents: Consider secure racking and cabinets to add another layer of security for valuables. Difficult to replace items such as jewellery or original documentation should be kept in a different location.

Added Deterrents

• Alarms Or Sensors: Battery devices are easy to install and provide an audible siren to warn off intruders.
• Marking The Contents: Keep a list of everything within your container and mark high-value items with a UV pen; this can deter resale and helps with recovery.

Build Security In From The Start

If you’re considering a conversion, you can be slightly more flexible with security during the planning stages. Depending on its intended use, adding windows or roller shutters can improve usability, but every opening needs to be assessed in terms of security. If you’re unsure, our friendly team are always happy to talk about security measures. We can also integrate lock boxes onto your existing container, upgrade doors, shutters and vents.

• Doors: 10ft containers and upwards usually offer four locking bars across the front cargo doors.
• Windows: In many settings, a small, high-level window can offer light/air without easy access. For larger windows, consider using anti-intruder mesh or grille.
• Roller shutters: Choose commercial-grade shutters with proper guides and locking; avoid light domestic versions.
• Internal lining: Lining and insulation add comfort but also create a concealed layer that can make cutting into containers slower and noisier.

Site Practices That Make The Biggest Difference

Upgraded security measures go further when paired with good day-to-day habits, such as:

• Key Control: Keep a simple record of who holds keys or fobs and retrieve keys when employees leave.

• Double Check Doors: Make double-checking the lock a habit every time you leave the container.
• Clear The Perimeter: Keep 1-2 metres around the container free of stacked materials to avoid intruder hiding places.
• Regular inspections. Check hinges, bars, seals and lock box fixings and report any damage promptly so that it can be repaired.

Security On Different Sites

At Home Or On Nearby Land
Place the container where it’s overlooked by the house or neighbours, fit a quality padlock and protector, add intruder-activated lighting and avoid drive-by visibility of the doors.

On Construction/Business Sites
Consider adding locked cages inside the container for high-value kit. Monitored alarms and person-activated lighting are recommended for the exterior. Avoid placing the unit where vehicles can reverse right up to the doors without being seen.

Common Myths

It’s steel so it’s unbreakable.
Containers are very strong but successful break-ins are still possible. The aim is deterrence and delay; a protected lock and good light/sound alarms turn most intruders away.

A bigger padlock means better security.
Not always. A large open-shackle padlock is actually easier to attack than a smaller, high-security closed-shackle lock set inside a padlock protector often referred to as a ‘D’ or ‘U’ padlock.

Once it’s locked, I’m done.
Good security means creating a layered network of deterrents; starting from where the container is situated, to door maintenance and regularly patrolling the area.

Why Choose Upminster Containers?

When it comes to shipping containers, we’re proud to be the experts. Since 1968 we’ve been trading, repairing and converting containers for clients and today we are still a family-run business with the same values that we started out with.

Security isn’t always straightforward and we’re here to make choosing the right unit and upgrades easy. Simply call 01708 225350 or get in touch with our team via the contact form below for guidance on which option is right for you.