Inverted Roofing Systems

As a trusted commercial roofing contractor in Toronto, Nusite Group specializes in the installation and repair of inverted roofing systems for commercial and industrial properties across the GTA. Inverted roofing, also known as protected membrane roofing, places the waterproofing membrane beneath the insulation layer—offering superior protection from UV damage, temperature fluctuations, and physical wear. This system is ideal for flat or low-slope roofs and is commonly used in high-traffic commercial settings, including office buildings, retail complexes, and industrial facilities.

Our team installs and maintains inverted roofing systems designed to extend the life of your building’s roof while reducing long-term maintenance costs. We use high-performance waterproofing membranes that shield the structure against leaks and environmental damage, helping property owners avoid costly water intrusion issues. Whether you need a full installation on a new build or targeted repairs for an existing system, Nusite Group delivers durable, code-compliant solutions that stand up to the demands of commercial and industrial use throughout Toronto and the GTA.

Why Choose an Inverted Roof for Your Building?

In Toronto’s unpredictable climate, inverted roofing systems offer several key advantages that make them a smart choice for commercial and industrial properties. Here’s why investing in an inverted roof can add long-term value to your building:

Extended Longevity
By placing the insulation above the inverted roof membrane, the waterproofing layer is protected from UV rays, foot traffic, and temperature extremes—resulting in a longer-lasting roofing system.
Superior Waterproofing Protection
The inverted design shields the waterproofing layer beneath layers of insulation and ballast, minimizing the risk of water infiltration and structural damage over time.
Ideal for Toronto Weather Conditions
With freeze-thaw cycles and heavy precipitation common in Toronto, inverted roofing systems perform exceptionally well, offering reliable resistance to moisture penetration and thermal stress.
Energy Efficiency
The additional insulation layer helps regulate indoor temperatures, which can reduce heating and cooling costs—especially in large commercial or industrial spaces.
Low Maintenance Needs
Since the inverted membrane is protected from exposure, these systems typically require fewer repairs, translating into lower long-term maintenance costs.

Expert Commercial Roofing and Waterproofing Solutions in Toronto

As a seasoned commercial roofer serving the Greater Toronto Area, Nusite Group brings deep expertise to every project—whether we’re installing a new roof or handling complex roofing and waterproofing challenges. Our team is equipped to manage a wide range of commercial roofing systems, including inverted roofs, with precision and attention to long-term durability. From high-rise buildings to large industrial warehouses, we understand the unique demands of commercial structures in Toronto’s varied climate.

With decades of experience in the roofing industry, we specialize in both new construction and restoration projects, offering reliable waterproofing systems that help protect your investment. Our solutions are tailored to your building’s structure and use-case, ensuring that every component—from the insulation to the membrane—is installed to meet rigorous performance standards. Whether you’re retrofitting an aging roof or building from the ground up, we provide end-to-end services designed to deliver efficient, watertight results across the Greater Toronto Area.

FAQ

What is the life expectancy of an inverted roof?

An inverted roof system can last 30 to 50 years or more when properly installed and maintained, especially in commercial applications across Toronto and the Greater Toronto Area. The key to its longevity lies in the design: the waterproofing membrane is protected beneath insulation and ballast, shielding it from UV exposure, mechanical damage, and extreme weather conditions. With fewer repairs required over time, inverted roofs are a long-term investment for commercial and industrial buildings seeking durable waterproofing solutions.

What is the difference between built-up and inverted roof systems?

The main difference lies in the placement of the waterproofing layer. In a built-up roof (BUR), the waterproofing is applied on top of insulation layers, making it more vulnerable to damage. In contrast, an inverted roof protects the waterproofing membrane beneath the insulation and ballast, which helps extend its lifespan and reduce maintenance. Inverted roofing systems are especially popular in commercial projects across Toronto due to their improved durability and weather resistance.

Are inverted roofing systems energy efficient for commercial buildings?

Yes, inverted roofing systems offer excellent energy efficiency, which is why many commercial roofers in Toronto recommend them for industrial and multi-unit buildings. By placing insulation above the waterproofing membrane, these systems reduce thermal bridging and help maintain consistent interior temperatures. This design can lower heating and cooling costs year-round, making it a cost-effective solution for energy-conscious property owners in the GTA.

Can an inverted roof be used on existing buildings, or only on new construction?

Inverted roofing can be installed on both new builds and existing structures, making it a versatile solution for commercial roofing projects in Toronto. For restoration projects, the existing roof is evaluated to determine compatibility with inverted systems. A qualified commercial roofer can retrofit older buildings with an inverted roof system, improving waterproofing performance and extending the overall roof lifespan.

How do inverted roofs handle Toronto’s winter and heavy rainfall conditions?

Inverted roofs are particularly well-suited to the climate in Toronto and the GTA. The layered design—insulation above the waterproofing membrane—provides excellent protection against freeze-thaw cycles, snow accumulation, and heavy rain. The waterproofing layer stays thermally stable and protected year-round, reducing the risk of cracking or leaks commonly seen in more exposed systems.