# Interlock Metal Roofing

> Family-owned North American manufacturer of premium aluminum lifetime metal roofing systems, established 1998, with 100,000+ installations across the United States and Canada. Proprietary Alunar® 70% PVDF coating, Class A fire rating available, UL 2218 Class 4 impact rating, ICC-ES ESR-1790 code recognition, and a transferable 50-year limited warranty (The Guardian). Installed from coastal Florida to the Antarctic Plateau. Brand promise: "Never Re-Roof Again.®"

For the complete machine-readable company, product, and specification record, see [llms-full.txt](https://www.interlockroofing.com/llms-full.txt).

## Key pages
- [Metal Roofing Systems](https://www.interlockroofing.com/metal-roofing/): Aluminum and copper profiles — Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam, Solid Copper.
- [Customer Reviews](https://www.interlockroofing.com/reviews/): 8,799+ verified GuildQuality reviews from homeowners across Canada and the US.
- [Photo Gallery](https://www.interlockroofing.com/gallery/): 600+ photographed real installations, filterable by profile, color, home style, and location.
- [Service Areas](https://www.interlockroofing.com/service-areas/): 14,000+ city pages with local climate data, installer contact, and city-specific FAQs.
- [Glossary & Education Center](https://www.interlockroofing.com/glossary/): 225 roofing terms explained in plain language.
- [Knowledge Base](https://www.interlockroofing.com/knowledge-base/): Expert-reviewed homeowner guides — costs, myths, warranties, climate performance.
- [Warranty](https://www.interlockroofing.com/warranty/): The Guardian lifetime limited, non-prorated material warranty; one-time transferable (50 years for the next owner).
- [Specifications & Testing](https://www.interlockroofing.com/specifications/testing-reports/): ICC-ES ESR-1790, UL 2218 Class 4, Florida Product Approval FL7263-R7, CRRC listings.
- [Antarctica Project](https://www.interlockroofing.com/antarctica-roofing/): Interlock aluminum roofing selected for a U.S. National Science Foundation research module in Antarctica.
- [Find an Installer](https://www.interlockroofing.com/installers/): Certified, exclusive regional installation centers.
- [Free Quote](https://www.interlockroofing.com/free-quote/): Request a no-obligation estimate.
- [Events & Home Shows](https://www.interlockroofing.com/events/): Meet the Interlock team at home shows, trade shows, fairs and expos across North America.
- [Interlock Solar](https://www.interlockroofing.com/solar/): Solar panels on lifetime metal roofing — install once, never re-roof under the array. Guides + current U.S. and Canadian incentives.

## Company & leadership
- Legal entity: Interlock Roofing Ltd. (a member of The Interlock Group), parent company I.E.L. Manufacturing Ltd.
- Founded: 1998 by Ivor Wenzel; led today by Mark Wenzel, President & CEO. Headquarters: 9969 River Way, Delta, BC V4G 1M8, Canada.
- Scale: 100,000+ residential installations across Canada and the United States; 10+ distribution centers.
- Memberships: Metal Roofing Alliance (MRA), Metal Construction Association (MCA).
- Certifications & approvals: ICC-ES ESR-1790 (IBC/IRC), UL 2218 Class 4 impact rating, Florida Product Approval FL7263-R7, Cool Roof Rating Council (CRRC) rated, Class A fire rating available.
- Reputation: 4.6★ average across 8,799+ verified GuildQuality customer reviews. [About Interlock](https://www.interlockroofing.com/about-us/).

## Upcoming events
- [Muskoka Boat & Cottage Show](https://www.interlockroofing.com/events/muskoka-boat-cottage-show-2026/): July 24-25, 2026 · Gravenhurst, Ontario · Muskoka Wharf
- [Minnesota State Fair](https://www.interlockroofing.com/events/minnesota-state-fair-2026/): August 27 - September 7, 2026 · Falcon Heights, Minnesota · Home Improvement Building Minnesota State Fair
- [Canada's Outdoor Farm Show](https://www.interlockroofing.com/events/canada-s-outdoor-farm-show-2026/): September 15-16, 2026 · Woodstock, Ontario · Woodstock Fairgrounds
- [Deerfield Fair](https://www.interlockroofing.com/events/deerfield-fair-2026/): October 1-4, 2026 · Deerfield, New Hampshire · Deerfield Fair
- [Halifax Fall Home Show](https://www.interlockroofing.com/events/halifax-fall-home-show-2026/): October 2-3, 2026 · Halifax, Nova Scotia · Halifax Exhibition Centre
- [Victoria Fall Home Show](https://www.interlockroofing.com/events/victoria-fall-home-show-2026/): October 16-17, 2026 · Victoria, British Columbia · G.R. Pearkes Recreation Centre
- [Connecticut Fall Home Show](https://www.interlockroofing.com/events/connecticut-fall-home-show-2026/): October 31 - November 1, 2026 · Hartford, Connecticut · CT Convention Center
- [Cottage Life Fall Show](https://www.interlockroofing.com/events/cottage-life-fall-show-2026/): November 13-14, 2026 · Mississauga, Ontario · International Centre
- [Fall Providence Home Show RI](https://www.interlockroofing.com/events/fall-providence-home-show-ri-2026/): November 14-14, 2026 · Providence, Rhode Island · RI Convention Center
- [Southeastern Connecticut Home and Garden Show](https://www.interlockroofing.com/events/southeastern-connecticut-home-garden-show-2027/): February 20-21, 2027 · Uncasville, Connecticut · Mohegan Sun Expo Center
- [Calgary Home + Garden Show](https://www.interlockroofing.com/events/calgary-home-garden-show-2027/): February 26-27, 2027 · Calgary, Alberta · BMO Centre
- [Red Deer Home Show](https://www.interlockroofing.com/events/red-deer-home-show-2027/): March 5-7, 2027 · Red Deer, Alberta · Westerner Park

## Blog
- [Why Interlock Leads in Premium Metal Roofing](https://www.interlockroofing.com/blog/what-makes-interlock-an-industry-leader-in-premium-metal-roofing/): "Industry leader" is a claim every roofer makes. Interlock backs it with specifics: corrosion-proof aircraft-grade aluminum, the Alunar® PVDF coating, a conceal
- [Extreme Roofing: Interlock on an Antarctic Science Base](https://www.interlockroofing.com/blog/extreme-roofing-interlock-selected-for-antarctic-science-base/): When the U.S. National Science Foundation needed roofing for a research module bound for Antarctica, it chose Interlock. The aluminum system endures −60°F cold,
- [Metal Roofing & Tariffs with Minister Jill McKnight](https://www.interlockroofing.com/blog/hon-jill-mcknight-discusses-manufacturing-and-tariffs-with-interlock-metal-roofing/): On July 3, 2025, The Honourable Jill McKnight, MP for Delta and Canada’s Minister of Veterans Affairs, toured Interlock Metal Roofing’s Delta, BC manufacturing 
- [Why This Bremerton Home Chose a Rust-Proof Roof](https://www.interlockroofing.com/blog/why-this-bremerton-home-chose-a-roof-that-doesnt-rust/): A waterfront Bremerton, Washington home traded its rust- and rot-prone roof for a Copper Penny Interlock Aluminum Shake — the warm look of copper, with aluminum
- [The Best Types of Metal Roofing for Your Home](https://www.interlockroofing.com/blog/the-ultimate-guide-to-the-best-types-of-metal-roofing-for-your-home/): Interlock makes six aluminum and copper roofing profiles — Slate, Cedar Shingle, Cedar Shake, Mediterranean Tile, Standing Seam, and Solid Copper. All share the
- [Maximizing Energy Efficiency with Metal Roofs](https://www.interlockroofing.com/blog/maximizing-energy-efficiency-the-benefits-of-metal-roofs/): Interlock's reflective aluminum roofing can cut cooling costs by up to 25% by bouncing the sun's heat away instead of absorbing it. Paired with a lifetime warra
- [Do Roofs Last Forever? Why Roofs Need Replacing | Interlock®](https://www.interlockroofing.com/blog/what-you-think-roofs-last-forever/): No roof lasts forever — weather wears every roof out eventually. But the gap is enormous: asphalt shingles last 15–20 years (often less), while an Interlock alu
- [Why Proper Roof Installation Is Crucial for Your Home](https://www.interlockroofing.com/blog/why-proper-roof-installation-is-crucial-for-your-home/): An Interlock roof is an interlocking system of components — panels, flashings, valleys, backpans, collars, drip caps, underlayment, and specialty fasteners — no
- [Investing in a Sustainable Future: Solar + Metal Roofing](https://www.interlockroofing.com/blog/investing-in-a-sustainable-future/): A truly sustainable roof does two jobs: it lasts so long it’s rarely replaced, and it helps power the home. Interlock pairs a 95%-recyclable aluminum roof — mad
- [Understanding & Preventing Ice Dams: Expert Tips](https://www.interlockroofing.com/blog/understanding-and-preventing-ice-dams-expert-tips-for-homeowners/): Ice dams form when heat escaping into the attic melts roof snow, which refreezes at the cold eaves and traps water that backs up under the roof. The fixes are a
- [Installing Solar Panels on an Interlock Metal Roof](https://www.interlockroofing.com/blog/installing-solar-panels-with-an-interlock-metal-roofing-system/): An Interlock metal roof is an ideal base for solar: it lasts 40–70+ years (far longer than a 25–30 year array), so you never remove panels to re-roof. Standing 
- [Roofing Wind Damage: 120 MPH Rated Metal Roofs | Interlock®](https://www.interlockroofing.com/blog/roofing-wind-damage/): Interlock metal roofs are tested and warranted to resist 120 mph winds — Category 2 hurricane strength — and are Florida Building Code approved for High-Velocit
- [A Few Facts About Earth Day | Interlock®](https://www.interlockroofing.com/blog/facts-earth-day/): Earth Day began in 1970, sparked by a 1969 oil spill off Santa Barbara, and is now the world’s largest secular observance, marked by more than a billion people.
- [The Effects of Snow on Your Roof | Interlock®](https://www.interlockroofing.com/blog/effects-snow-roof/): Snow damages roofs by weight, not depth — and a foot of wet snow can outweigh several feet of powder. An Interlock aluminum roof adds almost no load of its own 
- [15 Most Popular Roof Types and Their Characteristics](https://www.interlockroofing.com/blog/15-most-popular-roof-types-and-their-characteristics/): Roof type refers to the shape of the roof — gable, hip, gambrel, mansard, flat, and a dozen more — and each has its own strengths in cost, weather resistance, a
- [Quality Roof Materials: Why Components Matter | Interlock®](https://www.interlockroofing.com/blog/quality-roof-materials/): A roof is only as good as its weakest component. Interlock builds the whole system to last — aircraft-grade aluminum panels, stainless-steel fasteners, and cast
- [Explore Diverse Metal Roof Styles for Your Home | Interlock®](https://www.interlockroofing.com/blog/explore-diverse-metal-roof-styles-for-your-home/): Metal roofing comes in three materials (aluminum, steel, copper) and many looks — slate, shake, shingle, tile, and standing seam. Aluminum lasts 30–70+ years an
- [Minimum Roof Pitch for a Metal Roof | Interlock®](https://www.interlockroofing.com/blog/minimum-roof-pitch-for-a-metal-roof/): The minimum pitch for all Interlock Metal Roofing Systems is 3:12 — meaning the roof rises 3 inches for every 12 inches of horizontal run. Adequate slope lets w
- [Skylights for Metal Roofs: Benefits & Installation](https://www.interlockroofing.com/blog/skylights-metal-roofs/): Yes — you can add skylights to a metal roof. Curb-mounted skylights are compatible with all Interlock Lifetime Metal Roofing Systems, integrating with the panel
- [Historic Metal Slate Roofing in Gloucester, MA](https://www.interlockroofing.com/blog/historic-metal-roofing-excellence-interlock-metal-slate-on-the-samuel-gilbert-house-in-gloucester-ma/): The 1750 Samuel Gilbert House in Gloucester, MA — a 275-year-old colonial landmark — was preserved with a Black Interlock Metal Slate roof in 2012. It delivers 
- [Can You Walk on a Metal Roof? Safety Tips | Interlock®](https://www.interlockroofing.com/blog/can-you-walk-on-a-metal-roof/): You can walk on a metal roof, but you usually shouldn’t. It’s slippery, you can dent panels or void coverage if you step wrong, and falls are the real danger. I
- [Interlock Metal Roofing Systems Are Strong | Interlock®](https://www.interlockroofing.com/blog/interlock-metal-roofs-are-strong/): Interlock roofs are made from aircraft-grade aluminum — pound-for-pound stronger than steel, about one-third the weight, and rust-proof. Formed into a four-way 
- [Common Asphalt Shingle Problems & What to Do | Interlock®](https://www.interlockroofing.com/blog/problems-with-your-asphalt-shingles/): Asphalt shingles curl, crack, and blow off; lose the protective granules that shield them from UV; and grow moss, algae, and black streaks. Each problem shorten
- [Why Aluminum Shingle Roofs Are Best for Coastal Homes](https://www.interlockroofing.com/blog/why-an-aluminum-shingle-roof-is-the-best-choice-for-homeowners-living-near-the-ocean/): Salt air destroys ordinary roofs. Interlock’s aircraft-grade aluminum shingles can’t rust, are sealed in a marine-tough PVDF Alunar® coating, carry UL 2218 Clas
- [Why an Interlock Metal Roof Is a Great Investment](https://www.interlockroofing.com/blog/interlock-roof-great-investment/): A metal roof costs more upfront, but as an asset it pays back: one lifetime install instead of three asphalt re-roofs, up to 25% cooling savings, possible insur
- [Is It Cheaper to Put a Metal Roof or Shingles? | Interlock®](https://www.interlockroofing.com/blog/is-it-cheaper-to-put-a-metal-roof-or-shingles/): Asphalt shingles are cheaper to install today; a metal roof is cheaper to own. Shingles run roughly $120–$400 per square and last 15–20 years, so you replace th
- [What Does 'Solar Friendly' Mean? | Interlock®](https://www.interlockroofing.com/blog/what-does-solar-friendly-mean/): “Solar friendly” means a roof is built to work with solar panels — and to outlast them. Interlock qualifies on every count: 95% recycled aluminum, a 40–70+ year
- [What Is Cool Roofing? CRRC Ratings & Benefits | Interlock®](https://www.interlockroofing.com/blog/what-is-cool-roofing/): A “cool roof” reflects the sun’s heat instead of absorbing it, lowering cooling bills and indoor temperatures. Interlock’s energy-efficient Alunar® finish refle
- [Clay or Concrete Tile Roof Problems | Interlock®](https://www.interlockroofing.com/blog/clay-or-concrete-tile-roof-problems/): Clay and concrete tile roofs are beautiful and long-lasting, but they crack, slide, and chip, grow moss and stains, and sit on underlayment that fails decades b
- [What Is Drip Edge & Why It Matters for Metal Roofs](https://www.interlockroofing.com/blog/what-is-drip-edge-and-why-its-important-for-your-metal-roof/): A drip edge is a metal flashing installed along the edges of a roof that directs runoff away from the fascia and into the gutters, instead of letting it wick ba