Tension Fabric Buildings from MegaDome
Engineered for Strength.
Built for Compliance.
At MegaDome, our tension fabric buildings are designed by our in-house engineering team, ensuring full compliance with the latest and most rigorous building code standards, often exceeding them. We use the highest levels of steel galvanization for unmatched durability in any environment. Our MegaDome® Tension Fabric Buildings are permit-ready, rapidly deployable, and built to perform for decades.
Canadian manufacturer of steel-framed, fabric membrane structures
Manufactured in Quebec, Canada using structural steel and our exclusive Harnois oval tube.
Sealed engineering plans included with each building.
Widths from 33 to 160 feet with clearances from 15’3’‘ to 53’1’’.
Industrial
MegaDome® Tension Fabric Buildings are ideal for bulk storage, equipment warehousing, and for production workshops.
Agricultural
Tension Fabric Buildings ideal for storing equipment, sheltering livestock, protecting hay and feed, or covering manure.
Municipal
Tension Fabric Buildings for public works, salt and sand storage, waste management, and equipment protection.
Tension Fabric Buildings for Any Industry
Coverall Tension Fabric Buildings - Featured Projects
MegaDome by Harnois. We manufacture canvas buildings as a storage solution, creating spaces that offer long-lasting protection, quick installation, and optimal flexibility.
Our Expertise
Project management + In-house Engineering
We seamlessly blend top‑tier project management with a robust in‑house engineering team to deliver end-to-end success on every project. From planning and coordination to design and execution, we ensure a cohesive process—on time, on budget, and to your exact specifications.
Building trust
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 individualized touch to every tension fabric building 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 high-quality coverall building solutions.
Structures by Harnois
MegaDome tension fabric buildings are engineered, canvas buildings designed for optimal performance and durability. Designed in Canada, they withstand extreme weather and heavy use. With steel truss frames and tear-resistant polyethylene fabric, they offer strength, light, and flexibility. It is ideal for agriculture, industry, and municipal use. Fast to install, cost-effective, and backed by a 15-year warranty.
At its heart, MegaDome isn't just about a building. 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 individualized touch to every MegaDome® tension fabric building 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 high-quality coverall building solutions.
local relationships
Featured clients
Start your fabric structure projet now
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More info on fabric structure solutions
What Are Tension Fabric Buildings?
Fabric building solutions are modern, cost-effective structures made with a steel truss frame and a durable, tensioned fabric membrane. They offer a flexible, long-lasting alternative to traditional wood or metal buildings and are ideal for agricultural, industrial, and municipal applications.
At MegaDome®, our fabric buildings are engineered and manufactured in Canada to handle even the harshest environments. Our steel truss frames—the backbone of every structure—are available in two roof profiles: a classic peaked roof or an elegant arch profile. These options allow you to choose the shape that best fits your operational needs.
Key Features & Benefits:
- Available with peaked or arched steel truss frames
- Double truss
- Lower cost per square foot (starting at $15/sqft)
- 15-year structural warranty
- Customizable sizes and layouts
- Fast installation and easy relocation
- Naturally bright interiors with daylight-diffusing fabric
- Designed for durability and minimal maintenance
Discover how MegaDome® Coverall Buildings deliver the strength of steel and the efficiency of fabric—engineered to perform, built to last.
Why Choose MegaDome as a solution for warehouse and storage
If you’re considering a low cost fabric building for your next project, it’s time to look at MegaDome. Unlike generic fabric structures, MegaDome buildings are engineered in-house, built to meet your region’s building codes, and designed for maximum lifespan and performance. We offer stamped engineering, exclusive oval steel tubing, and hot-dip galvanized components—advantages most legacy Coverall-type companies don’t provide.
3 Potential Uses of Fabric Structures
MegaDome® Tension Fabric Buildings offer exceptional versatility across a wide range of industries. In agriculture, they are commonly used for equipment and machinery storage, hay and grain protection, livestock housing, and riding arenas. Their spacious interiors and natural light make them ideal for maintaining healthy animals and efficient operations. In the industrial sector, fabric structures serve as warehouses, bulk material storage facilities, maintenance shops, and even remote site shelters, thanks to their rapid installation and portability.
Municipalities and government organizations use canvas buildings for public works equipment storage, recycling centers, emergency response shelters, and fleet garages. Their cost-efficiency and durability make them a smart choice for year-round utility. Commercial and institutional applications include event venues, sports facilities, industrial storage, and aviation hangars—offering scalable space with minimal maintenance.
With their engineered steel truss frames, available in both peaked and arch profiles, and starting at just $15/sqft, MegaDome® Tension Fabric Buildings provide a reliable, adaptable, and long-lasting solution for nearly any environment or operational need.
Components Used & Their Benefits
MegaDome® Tension Fabric Buildings are designed using premium materials engineered to withstand Canada’s harshest conditions. At the core of each structure is a high-quality polyethylene fabric welded in our manufacturing facility under strict quality standards. This fabric is not only durable but also tear-proof—in the event of a puncture, the damage will not continue to spread. Minor repairs can be quickly and easily made using patch tape or by welding on a new piece of fabric, ensuring long-term durability and cost-effective maintenance.
Our steel truss frames—available in either a peaked or arch profile—can be manufactured from oval structural steel for added strength and visual appeal. To protect against corrosion, the steel components are hot-dip galvanized. They can also receive an epoxy coating for enhanced resistance in aggressive environments, such as salt storage or high-humidity agricultural settings.
The fabric cladding of Tension Fabric creates a naturally bright and energy-efficient interior. The translucent material allows soft, diffused daylight to enter, reducing the need for artificial lighting. This breathable environment helps regulate temperature, typically keeping the interior up to 10°C cooler in summer and 10°C warmer in winter—without the need for mechanical heating or cooling. For projects requiring controlled environments, insulation and HVAC systems can be integrated as needed to ensure optimal conditions.
We also offer an exclusive Canadian agricultural membrane that allows approximately 30% light transmission, creating an optimal environment for livestock, equipment, or crop storage. This specialized membrane enhances animal comfort, reduces stress, and promotes productivity, making it an ideal choice for farm operations nationwide.
Benefits of Tension Fabric Structures
MegaDome® Canvas Buildings offer a unique combination of strength, flexibility, and efficiency, making them an excellent alternative to traditional structures. One of the most significant benefits is their cost-effectiveness—with prices starting as low as $15 per square foot, fabric buildings provide large, functional spaces at a fraction of the cost of conventional construction.
These buildings are designed for rapid installation, allowing you to have a fully operational facility in weeks instead of months. Their modular design also allows for easy expansion, relocation, or reconfiguration as your needs evolve.
Another significant advantage is the natural light provided by the translucent fabric cladding. This reduces the need for artificial lighting, lowers energy costs, and creates a more comfortable and productive environment for both people and animals. Additionally, fabric buildings are naturally energy-efficient, often maintaining interior temperatures that are cooler in summer and warmer in winter—without relying on active climate control systems.
Built with galvanized steel trusses and tear-resistant polyethylene fabric, MegaDome® structures are engineered to withstand harsh weather conditions, including heavy snow, high winds, and extreme temperatures. Optional coatings, such as epoxy, can further enhance corrosion resistance in demanding applications, including salt storage and marine environments.
Whether you’re in agriculture, industry, or the public sector, MegaDome® Fabric Buildings offer long-term durability, low maintenance, and superior adaptability, making them an innovative and sustainable choice for a wide range of applications.