Our History and Expertise.
Founded in 1965 as Irrigation St. Thomas, MegaDome’s parent company, Harnois, began its journey by specializing in irrigation systems and advanced agricultural equipment. Quickly recognized for its technical expertise and customer focus, the company diversified in 1968 by entering the greenhouse manufacturing sector, a move that would shape its identity for decades to come.
By 1971, under the visionary leadership of Rolland and Yves Harnois, the company made a significant breakthrough by designing Quebec’s very first gutter-connected greenhouse complex. This achievement marked the beginning of a long tradition of innovation, with Harnois setting new industry standards throughout the 1970s and 1980s.
The introduction of circulation tubes for improved heating and natural ventilation tunnels not only modernized greenhouse construction but also positioned Harnois as a market leader in Canada. Our reputation for quality and ingenuity continued to grow. In 1982, Harnois became the first company in North America to implement oval tubes in greenhouse manufacturing—a technical advancement that enhanced structural durability and efficiency.
The Birth of MegaDome: A New Era in Fabric Buildings
Building on this momentum, we launched the MegaDome® division in 1999, expanding our expertise to include large-scale fabric buildings engineered for versatility and durability in even the most challenging environments.
Over the years, MegaDome has established a strong presence across North America, Mexico, and Japan, consistently adapting to the needs of various industries, from agriculture and horticulture to commercial, municipal, and industrial applications. Our custom solutions are the result of decades of research, field experience, and a deep commitment to client satisfaction.
Today, MegaDome® Fabric Buildings stands as a symbol of innovation and reliability, delivering custom fabric building solutions that reflect Harnois’ enduring legacy. Our team continues to pioneer new technologies and construction methods, ensuring every MegaDome structure offers superior performance, sustainability, and value.
Who We Are
A successful project leaves nothing to chance. That’s why MegaDome has built a dedicated team of experienced and highly skilled professionals who have collaborated for years on a wide range of projects.
Each member brings specialized expertise in design, engineering, project management, and installation, working closely together to anticipate every detail and ensure a smooth, worry-free process for our clients
Building Strong Partnerships for Lasting Success
Beyond our in-house talent, MegaDome has also developed long-standing partnerships with trusted vendors and subcontractors, many of whom have been part of our extended team for over a decade.
These relationships are built on mutual trust, shared standards of quality, and a deep understanding of our clients’ needs. By integrating the know-how of our partners and suppliers at every stage, we’re able to streamline coordination, maintain strict timelines, and adapt quickly to any Fabric Building project requirements.
Quality isn’t just our standard — it’s an attitude that defines everything we do.
At MegaDome by Harnois, quality isn’t just about top-tier materials and craftsmanship—it’s about the strength of our partnership with clients. We understand that collaboration and open communication drive better results. That’s why we foster a culture of transparency and teamwork, ensuring every project runs smoothly from start to finish. Our commitment to treating each project with precision and care is why clients continue to trust us, project after project.
Our community involvement
Associations
MegaDome Fabric Buildings is proud to be an active member of several respected industry associations, reinforcing our commitment to best practices, innovation, and quality across the markets we serve.
- 3R MCDQ – Regroupement des Récupérateurs et des Recycleurs de Matériaux de Construction et de Démolition du Québec;
- OGRA – Ontario Good Roads Association
- CRA – Canadian Rental Association
- APOM – Association des professionnels à l’Outillage Municipal
- ADMQ – Association des directeurs municipaux du Québec
- RIM – Réseau d’Information Municipale
