Harnois Industries

What Harnois Industries does

Harnois Industries (legal entity Les Industries Harnois Inc.) is a third-generation, family-owned Canadian manufacturer of commercial greenhouse structures and MegaDome fabric-covered buildings, founded in 1965 and headquartered in St-Thomas, Quebec. The company designs, fabricates, sells, and installs steel structures across three primary product lines: Harnois Greenhouses (Serres Harnois) including the Ovaltech individual greenhouse, Luminosa twin greenhouse, and TunnelPro Plus high tunnel lines; Vermax, a premium carbon-neutral glass greenhouse launched in 2022; and the MegaDome fabric-building division, which has delivered more than 5,000 dome projects worldwide for agricultural, industrial, mining, and municipal storage applications. Core technology rests on proprietary ovalized-tube steel engineering pioneered by Harnois in North America in 1982, Gothic-arch greenhouse geometry for natural light optimization, integrated roof-panel natural ventilation systems, and bundled climate-control, irrigation, and software platforms for turnkey delivery.

The company monetizes through project-based hardware sales of engineered steel structures plus professional services spanning design, installation, after-sales maintenance, and parts. Pricing is custom quote-based with multi-year project cycles; sales cycles for commercial greenhouses run 6–18 months. Harnois operates a hybrid go-to-market combining direct enterprise field sales with regional sales representatives covering territories such as Ontario and the Northeastern U.S., a dedicated Mexico subsidiary (Harnois Invernaderos) that accounts for roughly one-third of revenues and ~40% of Mexican high-tech greenhouse construction, and distributor networks across eastern and western Canada for the MegaDome line. It serves commercial vegetable, floriculture, and nursery growers; open-field and berry producers transitioning to protected agriculture (via a December 2024 partnership with Dubois Agrinovation); and industrial storage clients in mining, oil and gas, transport, and municipal sectors. Operations transform more than 10 million pounds of steel annually with a workforce of approximately 150 employees, manufacturing exclusively in Quebec.

Name

Harnois Industries

Legal name

Les Industries Harnois Inc.

Website

https://harnois.com

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

101–250 employees

Short description

Harnois Industries is a third-generation, family-owned Quebec-based manufacturer of commercial greenhouses and MegaDome fabric buildings, serving commercial growers, industrial storage clients, and protected-agriculture producers across North America and select international markets through project-based direct sales and distributor networks.

Ownership category

akta.pro rank

Product category

Commercial Greenhouse Structures

akta.pro primary industry

Greenhouse Structures & Construction (Frames, Glazing, Benches) (AFAAAHAA)

Keywords

• Commercial greenhouses
• Fabric buildings
• Steel structures
• Greenhouse manufacturing
• Agricultural buildings

Headquarters

HQ city

Saint Thomas

HQ country

Canada

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Greenhouse Manufacturing and Sales: Design, manufacture, and sale of professional greenhouse structures including individual greenhouses, twin greenhouses, high tunnel greenhouses, and commercial glass greenhouses (Vermax). Revenue is project-based with custom engineering for each installation.
2. MegaDome Fabric Buildings: Manufacturing and sale of membrane/canvas storage buildings for agricultural, industrial, mining, transport, and municipal applications. Custom-engineered steel structures delivered with precision installation. Over 5,000 dome projects built worldwide.
3. Engineering and Professional Services: Project management, engineering services, installation, after-sales service, maintenance and repair services, and parts and accessories. Full lifecycle support from design through installation and ongoing operations.
4. Integrated Equipment Solutions: Sale of integrated growing systems, irrigation systems, climate control equipment, sensors, and advanced software platforms for greenhouse management, typically bundled with greenhouse structures.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels8 records

Core offering

Harnois Industries designs, manufactures, and installs commercial greenhouses and MegaDome fabric buildings. The company sells turnkey greenhouse solutions including individual (Ovaltech), twin (Luminosa), and high tunnel greenhouse structures, plus the Vermax carbon-neutral glass greenhouse line. Under its MegaDome division, the company produces steel-framed membrane buildings for agricultural storage, industrial, mining, transport, and municipal applications.

Product overview

Harnois Industries is a manufacturer of professional greenhouses and fabric buildings founded in 1965, operating under three main sub-brands: Harnois Greenhouses (commercial greenhouse structures for horticulture), MegaDome (fabric-covered storage buildings), and Vermax (carbon-neutral glass greenhouses). The product portfolio includes turnkey greenhouse solutions with various models (high tunnels, individual Ovaltech greenhouses, twin Luminosa greenhouses), MegaDome canvas buildings for storage and agricultural uses, and Vermax premium glass greenhouses. Equipment offerings include integrated irrigation systems, climate control technologies, and automation solutions. The company employs over 150 people and serves customers across North America, Mexico, Africa, Europe, and Asia from its headquarters in St-Thomas, Quebec.

Differentiator

Problem solved

Functional benefit

Brands

• Serres Harnois: Professional greenhouse structures and turnkey greenhouse projects for growing fresh vegetables, new flower varieties and seedlings
• MegaDome
• Vermax

Products and services

• Harnois Greenhouses (Serres Harnois) Professional greenhouse structures and turnkey greenhouse projects for commercial horticulture, including high tunnels, individual greenhouses, twin greenhouses, and glass greenhouses for vegetable, flower, and seedling production.
• MegaDome Fabric Buildings Membrane/fabric-covered steel buildings serving as indoor storage expansion solutions for agricultural, industrial, mining, transport, and municipal sectors. Over 5,000 dome projects built worldwide, designed for durability, flexibility, and rapid installation.
• Vermax Glass Greenhouse The first carbon-neutral glass greenhouse and the only glass greenhouse manufactured in Quebec. Designed with carbon neutrality, energy efficiency, resource optimization, and business sustainability as core principles, representing the company's premium glass greenhouse offering.
• TunnelPro Plus Large tunnel-type greenhouse structures designed for open-field and berry production. Provides crop protection, climate control, and extended growing seasons for vegetables and fruits, with tailored irrigation per block at 1/2 hectare configurations.
• Ovaltech Individual Greenhouses Individual greenhouse structures featuring Gothic/oval-shaped arches that maximize natural light penetration. First North American greenhouse to use ovalized tube construction for structural integrity and light optimization.
• Luminosa Twin Greenhouses Twin/complex greenhouse structures with integrated natural ventilation through roof panels, offering wider structures up to 16.20 meters for enhanced luminosity and efficiency in commercial growing operations.

Quantifiable outcome

• 40% market share in Mexican high-tech greenhouse construction
• +3 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Dubois AgrinovationcoreStrategic or Co-development Partner · 4 December 2024Strategic partnership announced December 4, 2024, providing turnkey solutions for open-field and berry producers across Canada and the United States. The partnership combines Harnois high tunnel greenhouses (TunnelPro Plus) with Dubois' custom irrigation systems. A successful collaboration project already demonstrated results with 170 TunnelPro Plus greenhouses installed, increasing productivity and reducing operational costs for producers. This partnership enables combined product offerings targeting new market segments and extends reach to North American producers seeking complete protected agriculture solutions.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Rough Brothers (RBI Greenhouses): US-based commercial greenhouse manufacturer and builder serving vegetable, floriculture, and research growers. Closely comparable to Harnois Greenhouses in target market (commercial North American growers), product line (steel-frame glass and poly greenhouses), and turnkey project delivery model.
• Stuppy Greenhouse: North American manufacturer of commercial greenhouse structures and turnkey growing systems. Comparable to Harnois on product portfolio (gutter-connected and freestanding greenhouses), customer base (commercial growers), and project-based revenue model.
• Atlas Manufacturing: US manufacturer of steel and aluminum greenhouse structures for commercial horticulture. Direct peer to Harnois Greenhouses in core product (steel greenhouse frames), customer base (commercial vegetable and ornamental growers), and project-engineering service model.
• Agra Tech: California-based commercial greenhouse manufacturer offering turnkey structures for vegetables, flowers, and research applications. Comparable to Harnois in greenhouse structure manufacturing, North American customer base, and integrated equipment-plus-structure selling.
• Nexus Greenhouse Corp: US manufacturer of commercial greenhouses, educational and institutional growing structures, and integrated environmental systems. Comparable to Harnois on commercial greenhouse structure manufacturing, turnkey delivery, and integrated growing technology offering.
• Richel Group: French greenhouse manufacturer with strong European and international footprint serving commercial vegetable and ornamental growers. Comparable to Harnois as a multi-decade family-owned greenhouse structure manufacturer with international expansion and broad product portfolio including plastic and glass houses.
• Certhon: Dutch high-tech greenhouse builder specializing in turnkey horticultural projects including climate, irrigation, and automation systems. Comparable to Harnois Vermax and Serres Harnois divisions in the premium commercial greenhouse segment, especially relevant as a benchmark for high-tech international greenhouse project delivery.
• Kubo Group: Netherlands-based high-tech greenhouse constructor serving commercial growers worldwide with advanced semi-closed and glass greenhouse projects. Comparable to Harnois's premium and Vermax lines in product category, international scope, and integrated climate and automation solutions.
• Haygrove: UK-based manufacturer of polytunnels, tunnels, and substrate systems for berries and vegetables globally. Closely comparable to Harnois's TunnelPro Plus line for open-field-to-protected-agriculture transition serving berry and produce growers across multiple geographies.
• Sprung Structures: North American manufacturer of engineered membrane/fabric buildings for industrial, commercial, and institutional storage and workspace applications. Direct comparable to Harnois's MegaDome division in fabric building structures, rapid-installation engineered buildings, and multi-sector storage solutions.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCEFgZ9qgSov7mQfHEUD0YpQ
• Facebookfacebook.com/HarnoisInc
• LinkedInlinkedin.com/company/les-industries-harnois-inc-
• Instagraminstagram.com/industriesharnoisinc

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries4 records

Funding overview

Funding rounds1 record

Investors1 record

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 Harnois Industries