Slate Roofing in Ontario – Elegant, Fire-Resistant Metal Alternative

Interlock Slate is a metal roofing system that replicates the elegant look of natural slate, but it’s made from heavy-gauge aluminum panels instead of stone. Each aluminum shingle features a deep, stone-like texture and interlocks on all four sides to create a weathertight seal that resists leaks and high winds. Unlike natural slate (which is very heavy and may require extra structural support), the Interlock Slate roof provides the same protection against harsh weather without the excessive weight. This means you get the classic slate appearance along with modern benefits – the panels won’t crack or split due to freeze-thaw stress, they’re noncombustible for fire safety, and they’re much lighter on your roof structure.

Interlock’s aluminum slate shingles are engineered for longevity and sustainability. They are designed to last 50+ years with minimal upkeep, and the aluminum is coated with a protective Alunar® Coating System that resists corrosion and fading. This ensures the roof retains its beauty year after year. Moreover, Interlock Slate uses up to 95% recycled aluminum and is 100% recyclable at the end of its life, making it a very eco-friendly choice compared to quarried stone.

The difference in longevity is significant. In Ontario’s climate, a typical asphalt shingle roof might only last 12–18 years before it deteriorates or leaks, whereas an Interlock metal roof can easily last 50+ years or more. Asphalt shingles are prone to problems such as curling, cracking, losing granules, or blowing off in high winds, particularly due to the region’s freeze-thaw cycles and temperature fluctuations. By contrast, Interlock’s aluminum shingles do not crack, warp, or peel, and they’re warrantied for life (50-year transferable warranty) so that you truly “Never Re-Roof Again®”.

When it comes to upfront cost, a premium metal roof like Interlock Slate does require a larger investment than an asphalt roof. However, it’s crucial to consider the long-term savings. Over the decades, you would likely replace an asphalt roof 2 or 3 times (plus pay for ongoing repairs) in the same span that one Interlock roof protects your home. In the long run, the Interlock roof can save money, not to mention prevent the hassle and mess of frequent re-roofing. As one Ontario homeowner put it, “Would it cost more than a new asphalt shingle roof? Absolutely, but the increased cost seemed to more than offset the obvious benefits and life expectancy of an aluminum metal roof.”  Additionally, an Interlock roof can often be installed over your existing shingles, keeping old roofing out of landfills and reducing tear-off costs. Considering its longevity, durability, and energy savings, Interlock Slate provides outstanding value that extends beyond the initial price tag.

Not all metal roofs are created equal. The Interlock Slate Roofing System is crafted from high-grade aluminum, which provides it with several distinct advantages over standard steel roofing products. Aluminum naturally will not rust or corrode – ever. This is crucial in Ontario’s climate (especially near waterways or in humid conditions) where steel roofs can eventually suffer rust once their paint or galvanic coating wears down. Aluminum is also much lighter than steel (approximately one-third the weight) while being exceptionally strong. A lighter roof puts less strain on your home’s structure, which is helpful for older homes and means you typically don’t need any structural reinforcement to install an Interlock Slate roof.

Beyond the material, Interlock’s design and engineering set it apart from other metal roofs. Each shingle locks together on all four sides, a unique interlocking system that prevents wind uplift, water infiltration, and even warping. This 4-way Interlock, combined with a secure fastening method, gives Interlock roofs the ability to withstand extreme winds of up to 190+ km/h (120 mph) – equivalent to a Category 2 hurricane. Many cheaper metal roofs (like basic corrugated panels or exposed-fastener sheets) are more susceptible to leaking or blowing off in storms. Still, Interlock’s panels “prevent leaks, uplift, and warping” even in severe weather.

Homeowners also appreciate the aesthetics and maintenance benefits. Interlock offers several profiles and colours (slate, cedar shingle, shake, tile, etc.), all of which are protected by a fade-resistant architectural coating. This means you can get the look of slate, cedar, or tile in a metal roof that keeps its colour for decades without repainting. And despite what some think, a properly installed Interlock roof is no noisier than asphalt during rain or hail – the system includes solid sheathing and insulation that deadens sound. In summary, compared to many metal roofs on the market, Interlock provides a premium aluminum product with no rust, lighter weight, superior locking technology, and a wide range of styles to beautifully match your home.