Lifetime Aluminum Metal Roofing for the U.S. & Canada
Never Re-Roof Again.®
Interlock® designs and manufactures premium interlocking aluminum metal roofing systems — installed by certified local installers across the United States and Canada since 1998. Every roof features the Alunar® Coating System, UL 2218 Class 4 impact resistance, and a transferable 50-year limited warranty — with a Class A fire rating available.
Engineered for where you live — Alaska to Florida, Vancouver to Halifax
Aluminum doesn’t crack, split, or lose impact resistance through freeze-thaw cycling. Four-way interlocked panels shed snow and resist ice damming — the same construction selected for a research station in Antarctica.
WinterLock cold-weather roofing →Warranted to resist wind speeds up to 120 mph (193 km/h) when installed to spec, with panels that interlock on all four sides. Florida Product Approval FL7263-R7, tested to UL 580 / TAS 125 wind uplift standards.
See Testing Reports →The highest impact rating available — panels withstand a 2-inch steel ball dropped from 20 feet. The Guardian Warranty even covers perforation from hailstones up to 1.5 inches. Ask your insurer about impact-rated roof discounts.
Hail-resistant roofing →Energy-efficient colors with 0.84 thermal emissivity. Cool Roof IR-reflective pigments in the Alunar® coating reflect heat asphalt absorbs — cutting attic temperatures and summer cooling costs by up to 25%.
Energy-efficient roofing →Aluminum contains no iron — it cannot rust, and its oxide layer self-heals when scratched. The Alunar® PVDF finish is applied to both sides of every panel for extra protection in salt air, where many steel warranties exclude coverage.
Why aluminum doesn’t rust →Five Architectural Profiles. One Lifetime System.
Choose from five architectural profiles — Slate, Cedar Shingle, Shake, Mediterranean Tile, and Standing Seam — each interlocking on all four sides for wind resistance and installing over most existing roofs. Every profile comes in heavy-gauge aluminum, with solid copper available as an optional material.
Three Steps to Your Last Roof
- Free assessment
A local certified Interlock installer measures your roof and provides a free, no-obligation quote.
- Factory-made for your roof
Your panels are custom-manufactured in the exact profile and color you choose.
- Installed over most existing roofs
Certified installation crews install the interlocking system — usually with no tear-off going to landfill.
Engineered Numbers, Not Promises
Every claim below is published, third-party verified, and linked to its source — the way it should be.
- 50+ years
Engineered for 50+ years of service — most homeowners install an Interlock roof once and never roof again.
Guardian Lifetime Warranty - UL 2218 Class 4
The highest impact rating available: panels withstand a 2-inch steel ball dropped from 20 feet — a test simulating large hail.
Impact testing reports - 120 mph / 193 km/h
Warranted to resist wind speeds of up to 120 mph when installed to spec — with Florida Product Approval FL7263 for code-tested wind uplift.
The Guardian Warranty - Up to 25% cooler
Energy-efficient cool-roof colors with 0.84 thermal emissivity — IR-reflective pigments can cut attic temperatures and summer cooling costs by up to 25%.
CRRC listing - ESR-1790
ICC-ES evaluated to the International Building and Residential Codes — fire classification, wind uplift, and weather resistance, recognized since 2009.
ICC Evaluation Service - ~95% recyclable
Heavy-gauge, rust-proof aluminum with largely recycled content — fully recyclable again at end of life, ending the asphalt tear-off landfill cycle.
Environmental responsibility
Recent Installations Across North America
Original photography from real Interlock projects — browse the full photo gallery.
What Homeowners Say
1,054 verified customer reviews — read them all.
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★★★★★
Calgary roofs face frequent severe hail that causes major property damage, increasing the need for impact‑resistant materials. Repeated winter freeze–thaw cycles further stress shingles and seams, so durable Metal Shingles and professional installation are essential for long‑term performance in Calgary, AB. Luis provided excellent service—arrived with a great attitude and quickly resolved our roofing issues. I highly recommend Luis and Interlock Metal Roofing (Alberta) Ltd. for Metal Shingles installation in Calgary, AB.
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★★★★★
Nazar from Interlock Metal Roofing (New England) Inc. inspected my North Providence, RI roof, listened thoughtfully, evaluated the issues, explained everything, and promptly restored the ridge to my liking—he’s a true master with Aluminum Shingles. His repair addressed the ridge in a way that accounts for Providence County’s heavy winter snowfall (often 40–60″ annually) and frequent freeze–thaw cycles that promote ice dams and ridge stress.
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★★★★★
After a 12+ hour windstorm, Interlock Metal Roofing (Alberta) Ltd. provided same‑day repair on my 18‑year‑old metal roof in Calgary, AB — honoring a warranty that hadn’t been transferred and replacing two high‑up screws on a steep slope with honesty, professionalism and prompt service. In hail‑prone Calgary with frequent Chinook‑driven thaw/freeze cycles that stress roofs and fasteners, timely Metal Roofing repairs help prevent dents, fastener issues and ice‑dam risks. Highly recommend Interlock Metal Roofing (Alberta) Ltd. — first roof work in 18 years and an excellent experience.
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Frequently Asked Questions
Direct answers to the questions homeowners ask most.
How long does an Interlock metal roof last?
An Interlock roof is engineered as a lifetime system — designed for 50+ years of service and backed by a transferable 50-year limited warranty. Most homeowners never roof again.
How much does an Interlock metal roofing system cost?
Pricing depends on your roof’s size, pitch, complexity, and the profile and color you choose. An Interlock roof costs more upfront than asphalt but never needs replacing — paying for itself through decades of zero re-roofing costs and lower energy bills. Request a free, no-obligation quote for exact pricing.
Is the warranty transferable if I sell my home?
Yes. Every Interlock roof includes a 50-year limited material warranty that transfers to the new owner — a documented selling point when your home goes to market.
Do Interlock metal roofs protect against hail?
Yes. Interlock systems carry the UL 2218 Class 4 impact rating — the highest hail-resistance rating available — withstanding a 2-inch steel ball dropped from 20 feet without cracking or splitting.
Are metal roofs hot in summer?
No — the opposite. The Alunar® Coating System uses Cool Roof ceramic IR-reflective pigments that reflect solar energy, and Interlock roofs are CRRC rated, helping reduce attic temperatures and summer cooling costs by up to 25%.
Are metal roofs loud when it rains?
No. Interlock roofs install over your existing deck and underlayment, so rain noise is comparable to — often quieter than — an asphalt roof.
Does metal roofing work in extreme cold and heavy snow?
Yes. Aluminum doesn’t crack, split, or lose impact resistance through freeze-thaw cycling, and the interlocked panels shed snow and resist ice damming. The same Interlock aluminum construction was selected for a research station in Antarctica.
Is Interlock approved for Florida building codes?
Yes. Interlock systems carry Florida Product Approval FL7263-R7 under the Florida Building Code, are tested to UL 580 / TAS 125 wind uplift standards, and are warranted to resist wind speeds up to 120 mph.
Explore Interlock®
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Proven in Antarctica The same aluminum system, selected for the harshest climate on Earth. - Service AreasFind your local certified installer — 14,050 areas across the U.S. and Canada.
- Photo Gallery1,708 real installations — filter by profile, color, home style, and location.
- Customer Reviews1,054 verified reviews from homeowners across North America.
- Glossary & Education Center225 roofing terms explained in plain language — the deepest glossary in the industry.
- Knowledge BaseExpert-reviewed homeowner guides — costs, myths, and climate performance.
Talk to a roofing specialist
Family-owned North American manufacturer — serving homeowners since 1998.
Toll-free 1-866-733-5811 · 100,000+ installations across the U.S. and Canada.