Leader in turnkey fabric buildings
Engineered to protect
Experts since 1965
Engineered to shelter livestock and farm equipment
Our client commitment

Quality buildings starts with a quality relationship.

At MegaDome by Harnois, quality goes beyond top-tier materials and engineering — it’s rooted in the strength of our client partnerships. We believe that collaboration and open communication lead to superior results. By fostering a culture of transparency and teamwork, we ensure a seamless process from start to finish. Our dedication to precision and care is what keeps clients coming back, time and again.

Building trust with every project we deliver.

At its heart, construction isn't about structures. It's about people.

At MegaDome, we go the extra mile for our clients, building relationships founded on trust, confidence, and integrity. As a proud family-owned business, we bring a personal touch to every project we take on. Our commitment to people-first values is reflected in the way we treat our team, our partners and our clients. It’s this approach that drives our success and keeps our clients coming back.

Family-Owned, Client-Focused

Building strong relationships from the ground up.

Tailored Solutions, Turnkey Delivery

Personalized projects, from concept to completion.

Certified Excellence

Proudly delivering exceptional service with a personal touch.

Made in Canada

Designed and manufactured in Canada to ISO 9001 and CSA A660 standards, our main HDPE membrane, Powershield®, is made in Canada.
Our projects

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With over 55 years’ experience in manufacturing some of the world’s largest mining and industrial projects and enterprises, MegaDome knows what canvas buildings are all about.