Quick Answer: Inspect a second-hand shipping container in ten steps: stance, roof, walls, doors, gaskets, floor, interior daylight test, smell, CSC plate, and paperwork. The daylight test is the one that settles most sales: close yourself inside and look for light. Any beam means a breach. This checklist works at any seller’s yard, including ours.
In This Guide
Reading Time: 9 minutes
A Checklist You Can Use Against Us
A second-hand shipping container is a used industrial machine: a corten steel box that has crossed oceans, been stacked nine high, and taken forklift hits you will never hear about. Buying one well is a matter of twenty minutes of disciplined looking. This is the inspection we would want a stranger to run on our own rows, and we mean that literally: bring this list to the Brantford yard and work through it on any bin we show you. A seller who gets uncomfortable watching you inspect is telling you something more important than anything on the checklist.
Christian LeBlanc: “I grade incoming steel at the yard, and my whole job is the same six or seven tells, repeated honestly. Doors first, floor second, light test third. A buyer who checks just those three in that order is ahead of ninety percent of the market. The rest of the list is insurance.”
What to Bring: The Five-Item Inspection Kit
Phone with the flashlight on, a marble or golf ball, a screwdriver, work gloves, and boots you do not mind getting rusty. The marble checks floor slope, the screwdriver probes suspect wood, and the phone documents everything: photograph every defect you find, next to the container number, so the unit you inspected is provably the unit that ships.
The 10-Step Second-Hand Container Inspection
Run the steps in order; each one gates the next. If the box fails early, stop and save yourself the remaining steps.
- Stance. Stand back thirty feet. The container should sit square: straight roofline, no lean, no twist. A racked frame shows from a distance before it shows up close, and nothing on this list repairs economically once the frame is twisted.
- Roof. Corner castings are the tell: look along the roofline between them. Gentle waviness is cosmetic; standing water stains radiating from a dent mean ponding, and ponding is where roofs rust through. If the seller has a ladder, look; if not, photograph along the plane from both ends.
- Walls. Walk all four sides at arm’s length. Surface rust and scrapes are the normal biography of used steel. What matters is deep corrosion: bubbling paint with soft metal beneath, corrosion streaks running from seams, or any dent deep enough to crease the corrugation sharply, creases crack coatings and rust from inside.
- Doors. Open and close both, one-handed if you can. Smooth swing and clean cam engagement mean the frame beneath is true; a door you have to shoulder is usually a frame problem wearing a door costume. Work every handle and locking rod through its full travel.
- Gaskets. Run a gloved finger along the door seals. They should be rubbery and continuous, not cracked, flattened, or peeling. Gaskets are a cheap wear part, but dead gaskets tell you the box stopped being weathertight some time ago, so inspect the floor near the doors extra hard.
- Floor. Inside now, doors open. Walk the full length watching for soft spots and sniffing for rot; probe anything suspicious with the screwdriver, solid marine ply shrugs a screwdriver off. Check for oil staining and chemical residue, and roll your marble: it should wander lazily, not sprint to a corner.
- The daylight test. Have someone close the doors with you inside, or pull them to yourself. Ninety seconds of dark adaptation, then look: roof, seams, weld lines, around every patch. Any point of light is a hole, and every hole is a leak in an Ontario November. This single test catches what every visual pass missed.
- Smell. Still inside: a used container should smell like steel, faint sea, and old wood. Strong chemical or solvent odour means prior cargo you do not want under your stored goods, and mildew means moisture already won once. Odours outlast cleanings; trust your nose over the seller’s account.
- CSC plate. On the left door: the Safety Approval plate under the Container Safety Convention, carrying build date and inspection history. For storage duty an expired plate is fine and normal; what the plate gives you is the true age and a check against the seller’s story. A missing plate on a box described as cargo worthy is a contradiction worth asking about out loud.
- Paperwork. Match the container number stamped on the box to the number on the invoice, confirm the seller actually owns the unit, and get grade and any warranty language in writing. Honest yards do this without being asked; the other kind is the subject of the next section.
The Walk-Away List: When to Reject the Box
Checklists tell you what to examine; thresholds tell you when to leave. These five are non-negotiable at any price that is not scrap value:
Reject the Container When You Find
- A twisted frame: visible lean, doors that jam at the same spot every swing, or corner posts out of square. Structure is the one thing you cannot buy back.
- Rust-through: any daylight through roof or walls, or a screwdriver that goes into steel. Patches are possible; a patched box should be priced like a patched box.
- Floor rot across multiple boards: one soft board is a repair, a spongy floor is a rebuild that costs more than the discount ever covers.
- Chemical contamination: solvent smell or unidentifiable residue. Nobody stores family belongings or feed on a mystery spill.
- A seller who blocks inspection: no yard visit, no live video walkthrough, pressure to wire a deposit today. That is not a container problem, and it is the biggest walk-away of the five.
Everything short of those five is negotiation material rather than rejection material. Surface rust, faded paint, honest dents, dead gaskets: the normal wear of second-hand steel graded and priced honestly, and the reason used containers cost what they cost.
Walk a Bin With the List
Book a yard visit and inspect any unit in the rows with this exact checklist, or ask for a live video walkthrough of the grade you are hunting. Either way, you buy the box you inspected.
Inspecting When You Cannot Be There (and the Marketplace Trap)
Sometimes the buyer is in Timmins and the container is not. The remote version of this checklist is a live video call: the seller walks the box in real time while you direct, stance, doors swinging on camera, floor probe, daylight test with the phone inside, CSC plate close-up, container number matching the invoice. A legitimate yard does this without hesitation. We do it weekly.
Which brings up the pattern Paul has watched repeat for years: many people call us saying they found a bin for a thousand dollars less on Facebook. Two weeks later, some of them call back saying they got scammed, no container, no refund, no seller. The tell was always the same: no address to visit, no live video, urgency about the deposit. The full anatomy of that fraud lives in our scam-spotting rundown for container buyers; the one-line version is that every step of this checklist requires a real container to exist, which is exactly why scammers cannot survive it.
And if you would rather skip the remote logistics entirely: the rows at 90 Morton Avenue East in Brantford are open to walk, marble and screwdriver welcome; call the yard first at 519-754-6844 and we will have the grade you are hunting pulled to the front. Tell us what duty the box is headed for and we will point you at the grade that fits it, including the cheaper one when the cheaper one is enough. Quotes come with a real lead time, not a hopeful one, and 1-3 day delivery covers every region of Ontario.
Second-Hand Container Inspection FAQs
How long does a proper container inspection take?
About twenty minutes for the full ten steps, less once you have done it twice. The three highest-value minutes are doors, floor, and the daylight test; never skip those even when the seller is standing on your shoulder.
Is rust on a second-hand container a dealbreaker?
Surface rust is normal biography on used steel and affects price, not function. The dealbreaker is rust-through: soft metal under bubbling paint, or daylight through a panel. Learn to tell the two apart and most of the used market stops being scary.
Does an expired CSC plate matter for storage use?
No. The CSC plate certifies a container for international shipping; a ground-storage bin does not need current certification. The plate still earns its keep at inspection time because it states the build year, which keeps everyone’s story straight about the container’s age.
What is the single most reliable check on a used container?
The daylight test. Close yourself in, let your eyes adjust, and look for light at the roof, seams, and welds. It finds breaches that walk-arounds miss, costs nothing, and cannot be talked around by a seller. If a beam shows, the box leaks; the only question left is the price of the patch.
Can I use this checklist at the Van Blanc yard?
Please do. Walk any unit in the rows with the full ten steps; we grade steel for a living and would rather you verify than take our word. Buyers who inspect hard become the repeat customers, which after thirty years we can say with some data behind it.
Sources
- International Maritime Organization. (1972, amended). International Convention for Safe Containers (CSC). the convention at imo.org
- Institute of International Container Lessors. (2025). Container inspection and grading criteria. IICL. IICL inspection criteria
- The Container Guy. (2024). 2.1 Inspection Checklist. The Container Guy checklist
- SafetyCulture. (2025). ISO Container Inspection Checklists. SafetyCulture’s inspection checklists
Reach Van Blanc in Brantford
We have been supplying shipping containers across Ontario since 1995. Our warehouse is at 90 Morton Avenue E in Brantford, and we deliver right across the province with honest quotes and real lead times.
Van Blanc Ent. Inc., 90 Morton Ave E Unit 1B, Brantford, ON N3R 7J7, +1 888-509-6658
Bring the checklist, walk the rows, and buy the box you inspected. That is how used steel should change hands.