Quick answer: A shipping container roof kit spans a prefab steel roof between two parallel containers, turning the pair into a covered shed, workshop, or equipment bay in a weekend instead of a building season. Canadian vendors like Future Buildings and Toro Steel supply the kits. Van Blanc supplies the part underneath: two matched, structurally sound containers, placed level at your spacing, which is what the whole structure stands on.
How Does a Two-Container Roof Kit Work?
A two-container roof kit parks two shipping containers parallel and spans the gap between them with a prefab steel roof. That turns the pair into walls, lockable storage on both sides, and covered work space in the middle, all assembled in a weekend. The two containers are the foundation, the walls, and half the value of the build.
Arch-style roofs drop a curved steel span onto the container tops; straight-wall kits build vertical extensions first for full-height clearance across the span. Either way, the boxes do the structural work, so the canopy is only as honest as the pair underneath it.
“The roof gets all the attention, but the containers are doing the structural work,” says Christian LeBlanc, who runs the Brantford yard with his father Paul. “A kit that lands on two level, casting-sound boxes goes up clean. A kit that lands on a mismatched pair, or boxes that were never placed square, fights you the whole way.” Christian has spent four years placing pairs for exactly this build, and grew up around the trade traveling to Asia with Paul, who founded Van Blanc in 1995.
Ontario farms run this build for tractors and implements. Contractors run it as a yard shop. Townships and utilities run it for sand, salt, and fleet cover. The pattern repeats because the economics repeat: the structure goes up in days on ground that would still be waiting for footings under a conventional building. The same matched pair that carries a roof kit today can be split back into two standalone storage units later, which is a flexibility a poured building cannot offer.
What Roof Kit Types Are There, and Who Sells Them in Canada?
Roof kits come in two main shapes. Arch (Quonset-style) kits are the workhorses: curved galvanized panels, efficient snow shedding, simple assembly. Straight-wall kits trade some of that simplicity for square interior clearance, which matters when the bay houses a lift or tall implements. Canadian suppliers include Future Buildings and Toro Steel Buildings, both selling container-cover systems sized to common spans, with options like end walls, skylight panels, and vents. We do not sell or install kits, so read that list as a starting point for quotes, not an endorsement of one brand over another. The same span can also be enclosed into a finished bay later, which is the kind of conversion work our team scopes through our walkthrough of yard build-outs if the canopy grows into a closed shop.
Where Should a Roof Kit Mount, the Castings or the Roof?
A roof kit should mount to the corner castings or clamp to the top rail, never to the thin roof sheet. A container carries its rated strength through its corner posts, the same points a crane lifts from and a twistlock locks to. Quality kits transfer load there and leave the roof panels alone. Systems that bolt into corner castings without welding preserve the container’s structure, its warranty conversation, and its resale value. If a kit’s instructions start with cutting or welding the roof sheet, ask harder questions. The casting connection is the same load path that lets these boxes stack four and five high in a port, a load story we cover in our guide to how containers carry weight through their corners.
What Do the Two Containers Underneath Need to Be?
The two containers underneath a roof kit need three things: matched heights, sound corner castings, and level, well-drained bases set parallel at the kit’s specified spacing. The pair should match in height, two standards or two high-cubes, never one of each. Corner castings need to be sound, which is a structural check, not a cosmetic one (damaged castings are replaceable: we stock the casting and gasket hardware and treat the swap as a repair conversation). And the foundations matter more than usual: the kit ties two independent boxes into one structure that catches wind across the span and carries Ontario snow, so both containers want level, drained bases at the exact spacing the kit specifies, with anchoring to suit the site. Our field guide to pads and foundations covers the base options, and our tie-down guide covers the wind side of the question.
Grade is the budget lever, not a structural one. Wind and Water Tight units carry roof kits exactly as well as prettier steel, because the castings, not the paint, do the work. That typically makes the container pair the most affordable part of the whole structure. If the canopy faces the road or carries signage, a factory-new pair is worth pricing too, and our page on ordering new (one-trip) boxes explains when the cleaner steel earns its keep. Our breakdown of the four condition grades walks the full trade-off so you can match the grade to the job.
Roof Kit or Pole Barn: Which Should You Build?
A two-container roof kit and a pole barn solve the same covered-storage problem from opposite directions. A pole barn wins on clear interior span and permanence; the container canopy wins on speed, built-in security, and mobility. The containers lock like vaults while a pole barn’s open walls protect nothing until more construction goes in. And when the operation moves or the layout changes, a canopy disassembles and the containers go back to being containers. Here is the honest side-by-side:
| Factor | Two-container roof kit | Pole barn |
|---|---|---|
| Build speed | Days, often a single weekend of assembly | Weeks to a full season, after footings cure |
| Secure storage | Two lockable steel vaults built in on each side | Open bays; security added separately |
| Clear interior span | Limited to the kit span between the boxes | Wide, column-free interior |
| Foundation | Level, drained pads under each container | Engineered footings or slab |
| Mobility | Disassembles; containers relocate and reuse | Permanent structure, stays put |
| Resale of materials | Containers hold strong resale value | Little salvage value once built |
The full comparison, including where each build makes sense for an Ontario yard, lives in our deeper look at canopy builds against conventional barns.
Roof Kit FAQ
What is a shipping container roof kit?
A prefabricated steel roof, arch-style or straight-wall, that spans the gap between two parallel shipping containers, turning the pair into a covered equipment shed or workshop. The containers act as the walls and the foundation; the kit supplies the span. Canadian vendors like Future Buildings and Toro Steel sell the kits; the containers underneath are the part we supply.
Do roof kits damage the containers?
Good kits mount to the corner castings or clamp-style brackets rather than welding into the roof panels, which preserves the container’s structure and its resale value. A container’s strength lives in its corner posts and castings, exactly where a proper kit transfers the load.
How far apart can the two containers be?
Kit spans commonly run from about 20 feet up to 40 feet or more between containers, vendor-specific. The wider the span, the more the foundation and anchoring of each container matter, because the kit turns two independent boxes into one structure that catches wind and carries snow.
What do the containers need to be?
Matched heights (two standards or two high-cubes, not one of each), sound corner castings, and level, well-drained foundations set parallel at the kit’s specified spacing. Grade matters less than structure here: Wind and Water Tight units carry roof kits well, which keeps the project affordable. We level-check and place both boxes at delivery.
Does Van Blanc sell or install roof kits?
No, and we will not pretend otherwise. We supply and place the graded containers the kit lands on, matched heights, sound castings, level placement at your spacing, and the kit comes from a kit manufacturer. Tell us the span and the vendor you are considering and we will make sure the boxes underneath are right for it.
Two containers. One roof. Start with the right boxes.
The fastest answer is a call: tell us the span and the kit vendor and we will confirm the container pairing on the spot. We match two height-paired, casting-sound containers from 200+ in stock and place them level at your exact spacing, the foundation the whole build stands on.
Related: Tying canopies down for Ontario wind · How both boxes get placed level on site · Why the corner castings carry the load · Browse the container yard