No extra contractor. No second crew. Building Depot designs, pours and finishes the foundation for every engineered fabric building we install in Ontario.
Most fabric building dealers stop at the steel. We don't. Our own people grade the pad, set the forms, pour the concrete and tension the membrane — start to finish, with a single point of accountability.
That means the foundation is engineered for the building, the anchors land exactly where they need to, and you only ever sign one contract.
Full perimeter strip footings and slab-on-grade. The strongest option for permanent buildings carrying heavy loads, sidewall pressure or interior storage push-walls.
Stacked precast knee-wall blocks form a heavy mass perimeter that anchors the trusses and doubles as a push-wall for bulk material — salt, aggregate, fertilizer or grain.
Individual concrete piers anchor each truss leg. Minimal soil disturbance — perfect where the slab is gravel, sand or compacted base, and where the site may need to be restored later.
Block, conventional and pier systems are the three most common — Building Depot engineered fabric building buildings can be specified with up to nine engineered foundation types depending on soil, loading and end use.
Nine engineered foundation types. The three diagrams below show the most common cross-sections — Conventional strip footing, stacked precast Blocks, and concrete Pillars — each carrying the same steel arch on a different sub-grade detail.
Our team grades, surveys and tests the pad before a single form goes in. We confirm bearing, drainage and frost depth on every project.
Forms, embeds, rebar cages and anchor bolts are set by our own crew — matched to the engineered drawings stamped for your building.
Pump trucks, vibration, finishing and curing — done in-house. We pour foundations year-round across Ontario, including cold-weather hoarded pours.
Once cured, the same crew sets steel directly onto the foundation. No scheduling gaps, no finger-pointing between trades.
Every foundation is stamped and sized for your soil, snow and wind loads — not pulled from a catalogue.
Cold-weather hoarding, heated cure blankets and additives let us pour straight through an Ontario winter.
One contract. One crew. If anything moves, we're the only number you have to call.
Building Depot is the Authorized MegaDome Dealer for Ontario and MegaDome foundation services are one of the most-specified MegaDome configurations across the province. Engineered MegaDome foundation services 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.
Foundations matter more on a fabric building than on a conventional steel structure — the engineered foundation transfers wind uplift, snow drift and structural reactions into the soil and is the single largest contributor to the building's long-term geometry and weather-tightness. Building Depot operates its own concrete and foundation crews across Ontario, which means foundation design, construction and the building install are all delivered under one accountable contract and one project manager.
We pour pier, slab, curb-wall, pony-wall and pre-cast L-block foundations for MegaDome projects and standalone foundation work for other fabric building owners. Every foundation is engineered to the site's soils, the building's structural reactions and the application's operating loads.
This page is the complete Ontario reference for MegaDome foundation services — 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.
Drilled or augered reinforced concrete piers. Lowest-cost option, ideal for sloped sites and rural builds without slab requirement.
Engineered reinforced slab with thickened-edge perimeter. Standard for warehouse, dairy, shop and wash-down applications.
Pier foundation with a perimeter curb wall poured monolithic with the floor. Standard for clean-floor commercial and equestrian buildings.
Pre-cast concrete L-blocks retain working piles inside clear-span domes. Standard for salt, sand, aggregate and grain storage.
Foundation design starts with the structural engineering — the building's reactions (wind uplift, snow drift, structural dead and live loads) and the site's geotechnical conditions drive the foundation specification. For most Ontario sites we rely on a standard soils assumption supported by site-walk verification; for sites with known soil challenges we coordinate a geotechnical investigation through a third-party engineering firm.
On site, foundation construction runs in advance of the building install. Pier foundations are drilled or augered, rebar cages set, and concrete placed and cured. Slab and curb-wall foundations involve excavation, granular base, rebar, edge forming and concrete placement. L-block foundations involve granular base preparation, L-block placement and inter-block grouting where required.
Foundation construction is typically a 1–2 week scope on most Ontario sites. Concrete cure time runs 7–14 days depending on weather, after which the building install can commence. In cold weather we use insulated blankets and temporary heat to maintain cure conditions.
Every MegaDome MegaDome foundation services 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.
Drilled or augered reinforced concrete piers. Lowest-cost option, ideal for sites without a slab requirement and for sloped or rural builds.
Engineered reinforced concrete slab with thickened edge under the perimeter base channel. Standard for shop, warehouse, dairy and wash-down applications.
Pier foundation with a 12–24" perimeter curb wall poured monolithic with the floor. Standard for clean-floor commercial and equestrian buildings.
Pre-cast concrete L-blocks retain a working pile or commodity (salt, sand, aggregate, grain) inside a clear-span dome. Standard for bulk storage.
Because Building Depot operates its own foundation and building crews under one project manager, foundation and building install are scheduled as one continuous workflow — no waiting for a sub-contractor's schedule, no finger-pointing if foundation tolerances don't match building specification. Foundation as-built dimensions and anchor positions are verified before the steel arrives on site.
For third-party foundation work — owners with an existing fabric building who need foundation remediation or extension — we follow the same engineering-led process. Site inspection, engineered design, foundation construction and engineered as-built documentation for the owner's records.
MegaDome MegaDome foundation services 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.
Maintenance on a MegaDome MegaDome foundation services 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.
