Grain Storage Buildings Ontario
Bulk flat-grain MegaDome storage buildings engineered for Ontario producers — corrosion-resistant frames, clear-span, fast deployment.
Built for purpose. Built for Ontario.
On-farm flat-grain storage gives Ontario producers marketing flexibility — store the crop, wait for the basis, deliver when the price is right. MegaDome buildings deliver the cubic capacity of a bin at a fraction of the per-bushel cost, with the added benefit of drive-in access for clean-out and reload.
Hot-dip galvanized frames withstand the corrosive environment of stored grain, fertilizer dust and chemical residue. Pair with concrete pony walls sized to your peak grain depth and you have a permanent, code-compliant grain building engineered to OBC.
Common Ontario grain footprints range from 40' x 100' on-farm storage to 100' x 200' commercial-scale flat storage. Building Depot, Ontario's Authorized MegaDome Dealer, handles design, foundation, frame and commissioning under one contract.
The MegaDome advantage.
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The complete guide to grain storage domes.
Building Depot is the Authorized MegaDome Dealer for Ontario and bulk grain storage domes are one of the most-specified MegaDome configurations across the province. Engineered bulk grain storage domes combine a hot-dip galvanized steel arch frame with a high-tenacity PVC membrane to deliver a clear-span, naturally lit, corrosion-resistant envelope that lasts decades with a fraction of the operating cost of conventional steel or wood construction.
Bulk grain storage domes give Ontario cash-crop operations, elevators and feed mills enormous on-site capacity without the per-bushel cost of additional silo construction. A 100' × 200' MegaDome with L-block walls holds well over 200,000 bushels of corn, soy or wheat, and a clear-span loader path means a payloader works the pile without the column constraints of a conventional pole-barn flat storage. The translucent membrane gives the operator full visibility into the pile from the loader cab — a real safety and efficiency advantage during a harvest push.
Building Depot has installed grain domes for cash-crop farms, on-farm grain handlers, commercial elevators and feed mills across Wellington, Huron, Perth, Oxford, Lambton, Essex and Eastern Ontario. Foundations are typically pre-cast L-block, sized to the pile angle of repose and the chosen commodity, with a reinforced slab apron at the loading face for clean pile management.
This page is the complete Ontario reference for bulk grain storage domes — covering benefits, applications, construction process, engineering, foundation options, installation, warranty and ongoing maintenance. Every Building Depot project is delivered turnkey under one accountable contract: in-house engineering, stamped Ontario drawings, municipal permit management, foundation construction, fabric installation and full commissioning. One contract, one project manager, one phone number from kickoff to keys.
Headline benefits.
Where MegaDome fits.
Cash-Crop Farm Storage
On-farm flat storage for corn, soy and wheat. Sized to annual production and turnover.
Commercial Elevator
Commercial grain elevator overflow and seasonal capacity. L-block walls and loader apron sized to commercial throughput.
Feed Mill Receiving
Feed mill incoming-commodity storage. Multiple bays for segregated commodities under one clear-span dome.
Fertilizer & Custom-App
Dry fertilizer cover for retail and custom-app operations. Same L-block and clear-span envelope, sized for spreader and tender access.
Operators we build for across Ontario.
From contract to keys.
Every Building Depot bulk grain storage domes project follows the same disciplined sequence. It starts with a site visit and a needs interview so we understand the operation, the equipment moving through the building, the access routes and any local zoning or conservation constraints. From there our in-house designer produces a stamped engineering package — building dimensions, foundation, ventilation, door layouts and any internal partitions — sized to the application and engineered to the site's snow, wind and exposure category under the Ontario Building Code.
The stamped package goes straight into the municipal permit submission. Building Depot manages the back-and-forth with the local building department and coordinates any conservation authority, site plan or zoning approvals required for the site. While the permit is in review, the foundation crew is mobilized and the steel order goes into production so the project moves the day the permit is issued.
On site, the foundation runs first — pier, slab, L-block or curb wall, depending on the configuration. Steel arches are raised next using a mobile crane and the Building Depot install crew, the fabric membrane is tensioned over the engineered ratchet system, end walls are framed and clad, and any door, lighting or ventilation systems are commissioned. The owner gets one accountable contract, one project manager and one weekly status update from contract signing through to keys.
Stamped Ontario engineering on every project.
Every MegaDome bulk grain storage domes Building Depot delivers in Ontario ships with third-party engineering sealed by an Ontario P.Eng. and certified to CSA A660 — the Canadian standard for pre-engineered steel building systems. Engineering accounts for site-specific snow loads (1.6–3.5 kPa across the province), hourly wind pressures per the Ontario Building Code, unbalanced snow drift conditions and any seismic factors. Drawings include the full structural design, foundation reactions, anchor bolt schedules and ventilation specifications, and are submitted directly into the municipal permit package.
Engineering is included in every Building Depot quote — never billed separately, never outsourced to a third party the owner has to chase. The same engineering team that designs the building stands behind it through the permit process, the foundation inspection and any post-construction follow-up. That single accountable contract is why GTA developers, Northern Ontario mining operators and Eastern Ontario municipalities specify MegaDome through Building Depot as their default fabric building solution.
Engineered to your site, your budget and your soil.
Concrete L-Block
Pre-cast concrete L-blocks retain a working pile or commodity (salt, sand, aggregate, grain) inside a clear-span dome. Standard for bulk storage.
Reinforced Slab
Engineered reinforced concrete slab with thickened edge under the perimeter base channel. Standard for shop, warehouse, dairy and wash-down applications.
Concrete Pier
Drilled or augered reinforced concrete piers. Lowest-cost option, ideal for sites without a slab requirement and for sloped or rural builds.
Turnkey installation by Building Depot crews.
Building Depot maintains its own installation crews across Ontario — based in the GTA, Eastern Ontario and Northern Ontario — so we never sub-contract the install to a crew unfamiliar with MegaDome's tensioning system. A typical bulk grain storage domes install runs 2–4 weeks for the steel frame and membrane portion, on top of 1–2 weeks for the foundation and 1 week for end-wall and door commissioning. Larger or column-free wide-span buildings (140'+) add an additional week for staged arch erection.
Steel arches are raised in sequence using a mobile crane sized to the arch weight. The PVC membrane is tensioned over the steel using engineered ratchet tensioners, with a 24-hour set period followed by a final tension check before sign-off. End walls are framed in galvanized steel and clad in matching membrane, insulated metal panel or owner-supplied finishes. Through the entire install, the client works with a single Building Depot project manager — no calling around for status updates, no finger-pointing between trades.
Backed for the long haul.
MegaDome bulk grain storage domes carry a 25-year limited warranty on the structural steel frame and a 15-year limited warranty on the PVC membrane. Both warranties cover materials and workmanship and are honoured directly by Building Depot — Ontario's Authorized MegaDome Dealer — so warranty claims are resolved by the same team that installed the building, not bounced between a dealer, a manufacturer and a sub-contracted installer.
Hardware components — ratchet tensioners, anchor brackets, ventilation louvers and door systems — are covered under the membrane warranty. Building Depot maintains a full inventory of replacement membrane panels, brackets and hardware in Ontario, which means warranty service is typically scheduled within days, not the weeks it takes a U.S.-based supplier to ship parts across the border.
Simple, predictable upkeep.
Maintenance on a MegaDome bulk grain storage domes is intentionally minimal — that's a core part of the value proposition versus conventional steel. Annual maintenance comprises a visual inspection of the membrane surface and ratchet tensioning system, a check of ridge vents and gable louvers, a tightening of anchor bolts where exposed and a wash-down of any accumulated debris. The hot-dip galvanized steel frame requires no painting, no rust treatment and no panel replacement over the building's design life, which is a meaningful operating-cost advantage over painted metal buildings that demand recoating every 10–15 years.
Building Depot offers an Ontario-wide annual inspection and re-tensioning service for operators who want a turnkey maintenance contract. A typical building requires a half-day visit once a year to remain in warranty-compliant condition. At the 5–7 year mark, our crews perform a full re-tension of the membrane to compensate for the natural relaxation that occurs in any PVC fabric structure. With that simple maintenance cycle, MegaDome buildings routinely deliver 25–30+ years of service before any fabric replacement is required.
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