What MegaDome does

MegaDome is a Canadian manufacturer of permanent engineered fabric buildings, operating as a brand under Industries Harnois and founded in 1999. The company designs, engineers, manufactures, and installs tensioned fabric membrane structures supported by proprietary oval-tube steel framing, sold as an alternative to conventional steel or wood construction for industrial, agricultural, and municipal customers across North America. Manufacturing is conducted in Quebec under ISO 9001 and CSA A660 certifications, with notable proprietary elements including silicon bronze welding (ERCuSi-A) — for which MegaDome holds exclusive Canadian authorization — and the PowerShield HDPE membrane with 30% light transmission (versus 16% for standard membranes). The product portfolio spans widths from 33' to over 160' across multiple series (DB, AR, HP, XP, XXP, S100) and includes add-on membrane, steel frame, foundation, and door components.

The business operates a turnkey model combining one-time project sales priced at $10-$25 per square foot for the structure plus installation, foundation, and accessories, with project values ranging from approximately $45,000-$95,000 CAD for a typical 40'x80' building to several hundred thousand CAD for large industrial or mining installations. Revenue is generated through direct enterprise sales, an authorized dealer network spanning North America (including BuildWorks in BC and Integral Containment in Saskatchewan), three installation service tiers (turnkey, supervised, self-install), and after-sales service and relocation support. The company has completed over 5,000 projects since 1999 and maintains approximately 150 ongoing projects, with a stated headcount of 121 employees. Customer segments span agriculture, mining (Teck Coal, Rio Tinto, Nouveau Monde Graphite, Canadian Royalties), transportation (Canadian Railway, Trois-Rivières Port Terminal), waste management (GFL Environnement, Centre de Valorisation M. Charette), municipal/public works, equestrian, aviation, and energy/oil — indicating a deliberately diversified vertical mix rather than reliance on any single end market.

Name

MegaDome

Legal name

MegaDome by Harnois

Website

https://megadomebuildings.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

MegaDome is a Quebec-based Canadian manufacturer of permanent engineered fabric buildings using proprietary oval-tube steel framing and HDPE membranes, serving industrial, agricultural, and municipal customers across North America via direct sales and an authorized dealer network since 1999.

Ownership category

akta.pro rank

Headquarters

HQ city

Saint-thomas

HQ country

Canada

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Fabric Building Sales (One-Time): MegaDome generates revenue primarily through one-time sales of custom-engineered fabric buildings. Buildings are priced per square foot with customization options for width, length, height, truss profile, cladding, insulation, doors, ventilation, and foundation type. Complete engineered kits are shipped with all structural components, hardware, and stamped drawings included.
2. Installation Services: Turnkey installation services where MegaDome's expert teams handle complete fabric building installation adhering to strict safety standards and deadlines. Also offers project supervision services for clients with their own construction teams, and self-installation options with technical support.
3. After-Sales Service and Parts: After-sales service including supply of replacement parts when available, technical support to help extend the lifespan of buildings. Ongoing support during and after construction backed by warranty.
4. Relocation Services: Fabric buildings can be disassembled, moved, or expanded. MegaDome provides full support including dismantling, transporting to new site, and reinstalling with the same care as initial installation.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

MegaDome manufactures and installs permanent engineered fabric buildings (steel-frame, HDPE-membrane structures) for industrial, agricultural, and municipal applications across North America. Buildings are custom-engineered for site-specific snow, wind, and seismic loads and sold as complete kits with stamped engineering plans. Turnkey delivery covers engineering, manufacturing, installation, and after-sales service, with widths from 33' to over 160' and unlimited lengths.

Product overview

MegaDome is a Canadian manufacturer of permanent tensioned fabric buildings, offering engineered steel-frame structures with fabric membrane covers as an alternative to conventional construction. The product portfolio is organized into multiple building series: DB Series (33'-100' widths), AR Series A-Frame profiles (60'-100'), 100 Series wide-span buildings (100'-160'), and Sprung Buildings with HD/HHD/S100 variants. All buildings feature the proprietary PowerShield membrane technology with exclusive 30% light-transmission agricultural option. Installation services, foundation options, ventilation systems, and door configurations are available as customizable add-ons. The company discontinued its non-engineered EZDome and EZKit temporary shelter lines, replacing them with engineered HP Series models (33' and 40').

Differentiator

Problem solved

Functional benefit

Brands

• PowerShield: Exclusive membrane technology featuring superior polymer technology for waterproof and durable building covers
• HP Series
• XP Series
• XXP Series
• S100 Series
• AR Series
• DB Series

Products and services

• MegaDome Coverall Buildings Permanent tensioned fabric membrane structures supported by oval-tube steel frames, designed as an alternative to conventional steel or wood buildings. Available in widths from 33' to over 160' with unlimited length options. Used across industrial, agricultural, and municipal applications.
• DB Series Fabric Buildings Standard coverall building series available in widths from 33' to 100' with double truss arch options (16" to 30"). Core product line for industrial, agricultural, and municipal applications.
• 100 Series Wide Span Buildings

Quantifiable outcome

• Fabric buildings typically cost 30-50% less upfront than conventional steel buildings
• +4 more outcomes

Named customers14 records

Segments10 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered regional and core.

• BuildWorksregionalChannel Partner/ Reseller/ DistributorBuildWorks is a trusted distributor of MegaDome fabric building structures in British Columbia. They partner with MegaDome by Harnois to deliver durable and versatile solutions for industrial, agricultural, and commercial use. BuildWorks provides local expertise and ensures businesses across British Columbia receive tailored fabric building solutions.
• Integral ContainmentregionalChannel Partner/ Reseller/ DistributorIntegral Containment is a trusted distributor of MegaDome fabric buildings in Saskatchewan. They partner with MegaDome by Harnois to deliver durable, cost-effective solutions for industrial, agricultural, and commercial use. They ensure quality, efficiency, and reliability in every project across Saskatchewan.
• Harnois (Parent Company)coreStrategic or Co-development PartnerIndustries Harnois is the parent company of MegaDome. Harnois has over 60 years of expertise in steel structures and membranes. MegaDome buildings are part of the Harnois product portfolio, combining Harnois's extensive experience with MegaDome's specialized fabric building technology.

Scale indicators8 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Legacy Building Solutions: US-based manufacturer of engineered fabric buildings on rigid steel frames (rather than aluminum). Competes head-to-head with MegaDome in industrial, aviation, and mining segments with a comparable customization and engineering-led sales motion.
• Big Top Manufacturing: US manufacturer of fabric structures including industrial, storage, and aviation applications. Direct competitor in industrial and storage verticals with comparable turnkey sales and installation model.
• Hercules Truss Arch Buildings: US-based manufacturer of prefabricated steel-framed fabric buildings for agricultural, commercial, equestrian, and industrial markets. Comparable product offering and pricing model position it as a direct peer in MegaDome's core verticals.
• ClearSpan Fabric Structures: US-based manufacturer and installer of fabric and steel buildings including truss-arch fabric structures. Direct competitor in agricultural, commercial, and industrial storage with comparable widths and pricing per square foot.
• Sprung Instant Structures: Canadian-origin manufacturer of engineered tensioned fabric structures with aluminum substructure for industrial, military, and commercial applications. Most direct fabric-building competitor to MegaDome with comparable global reach and similar turnkey installation model.
• Alaska Structures: US-based manufacturer of engineered fabric buildings for industrial, military, mining, and remote-site applications. Comparable engineered tensioned-membrane technology and focus on harsh-environment deployments overlap directly with MegaDome's mining and industrial value propositions.
• Accu-Steel Fabric Buildings: US manufacturer of engineered fabric-covered steel buildings serving agricultural, commercial, and industrial customers. Comparable product architecture (steel frame + fabric membrane) and similar end-market mix make it a direct peer.
• Norseman Structures: Canadian manufacturer of fabric-covered steel buildings serving agricultural, industrial, commercial, and aviation markets. Direct peer given shared Canadian manufacturing base, comparable product widths, and overlapping vertical mix.
• Britespan Building Systems: Canadian manufacturer of prefabricated fabric-covered steel buildings serving agricultural, commercial, industrial, and recreational markets. Direct peer given overlapping product lines, Canadian manufacturing base, and shared focus on agricultural and equestrian verticals.

Broad incumbents

• ATCO Structures: Global modular space and workforce housing provider that absorbed the legacy Cover-All Building Systems fabric brand. Competes with MegaDome in industrial and remote-site fabric structures but operates a much broader portfolio spanning modular buildings, workforce housing, and noise barriers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xfacebook.com/structuremegadome
• YouTubeyoutube.com/channel/UCEFgZ9qgSov7mQfHEUD0YpQ
• Facebookfacebook.com/structuremegadome
• LinkedInlinkedin.com/showcase/batiments-megadome-buildings
• Instagraminstagram.com/batiments_megadome_buildings
• Pinterestca.pinterest.com/megadome_harnois

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about MegaDome