Canadian Manufacturer Offers Lifetime Aluminum Roofing With Class 4 Impact Rating
Delta, Canada – June 25, 2026 / Interlock Roofing Ltd. /
Interlock Roofing Ltd., a Canadian manufacturer of aluminum roofing systems, has formally highlighted its UL 2218 Class 4 impact-rated lifetime roofing line as a direct response to homeowners and contractors seeking durable, long-term alternatives to conventional asphalt and composite materials. The announcement centres on the company’s Delta, British Columbia production facility, where aluminum roofing systems have been manufactured continuously since 1998, and draws attention to the systems’ certified performance credentials at a time when extreme weather events are placing greater stress on residential and commercial roof assemblies across North America.
“Homeowners are tired of replacing asphalt every 15 or 20 years,” said Scott Plumptree, Director of Marketing at Interlock Roofing Ltd. “A Class 4 impact rating and a transferable lifetime warranty change the math — this is a roof built to be the last one a home needs.”
Nearly Three Decades of Manufacturing From a Single Canadian Facility
Interlock Roofing Ltd. has operated its manufacturing operations out of Delta, British Columbia since 1998, giving the company a verifiable production history that spans nearly three decades. The facility produces aluminum roofing profiles across five distinct styles — Slate, Cedar Shake, Shake, Mediterranean Tile, and Standing Seam — each engineered to replicate traditional roofing aesthetics without the weight, fragility, or shorter service life associated with those materials.
All profiles manufactured at the Delta facility incorporate the company’s proprietary Alunar coating system, a finish technology developed to extend the functional lifespan of the aluminum substrate while maintaining colour and surface integrity over decades of exposure. The Alunar coating is central to the product’s long-term performance claim and is applied as a standard component of every roofing system that leaves the facility.
Class 4 Impact Rating and Class A Fire Certification Define the Performance Baseline
The roofing systems produced by Interlock Roofing Ltd. carry two independent third-party certifications that define their performance floor. The first is a Class A fire resistance rating, the highest classification available under standard fire testing protocols, indicating the material resists the spread of flames and withstands severe fire exposure conditions. The second is a UL 2218 Class 4 impact resistance designation, the highest available tier under the UL 2218 test standard, which simulates the effect of large hailstones dropped from varying heights onto a roofing surface.
Achieving Class 4 impact status is significant for homeowners in hail-prone regions, as many insurance carriers in the United States and Canada offer premium reductions for structures covered by materials that meet this threshold. The combination of Class A fire and UL 2218 Class 4 certifications in a single aluminum roofing system positions Interlock Roofing Ltd. products as a practical option for homeowners in regions where both risks are present.
Verified Installation Record Across Extreme Climate Conditions
Interlock Roofing Ltd. has documented installations in environments that represent opposite ends of the climate spectrum. As part of the U.S. National Science Foundation’s SPOT MODULE project, the systems were deployed in Antarctica, where temperature extremes, ice loading, and wind exposure create some of the most demanding conditions any building material can face, as well as in coastal Florida, where salt air corrosion, high humidity, and hurricane-force wind events challenge roofing systems year-round.
This geographic range reflects the material properties of aluminum itself, which does not rust, resists salt corrosion, and remains structurally stable across wide temperature fluctuations. The documented installation history in both polar and subtropical environments provides a real-world basis for the company’s durability claims that goes beyond laboratory certification alone.
Lifetime Limited 50-Year Transferable Warranty Adds Long-Term Value for Property Owners
Each roofing system manufactured by Interlock Roofing Ltd. is backed by a lifetime limited 50-year transferable warranty, a feature that carries direct financial implications for homeowners who may sell their property within the coverage period. Because the warranty transfers to subsequent owners, the coverage represents a quantifiable asset that can be communicated during a real estate transaction, differentiating the property from comparable homes with conventional roofing materials that carry shorter or non-transferable warranties.
The lifetime limited 50-year transferable warranty term also reflects the manufacturer’s confidence in the aluminum construction as a system capable of maintaining performance standards over an extended service life without requiring replacement. For homeowners evaluating the total cost of a roofing investment over time, the combination of durability, certification standards, and transferable warranty coverage represents a measurable set of factors to weigh against lower upfront-cost alternatives.
About Interlock Roofing Ltd.
Interlock Roofing Ltd. is a Canadian manufacturer of aluminum lifetime roofing systems based in Delta, British Columbia, serving homeowners across Canada and the United States. The company has produced roofing profiles including Slate, Cedar Shake, Shake, Mediterranean Tile, and Standing Seam styles since 1998, each featuring the proprietary Alunar coating and backed by a lifetime limited, 50-year transferable warranty. Products are certified to Class A fire resistance and UL 2218 Class 4 impact resistance standards, with documented installations across a range of global climate environments.
Learn more at Interlock Metal Roofing.
Contact Information:
Interlock Roofing Ltd.
9969 River Way, Delta, BC V4G 1M8, Canada
Delta, BC V4G1M8
Canada
Scott Plumptree
18667335811
https://www.interlockroofing.com
