Copper Roofing Systems
Interlock® Copper Roofing: Solid Copper, Century-Long Lifespan
Copper roofing is one of the most durable, beautiful, and prestigious roofing materials available — with a proven lifespan exceeding 100 years on properly installed structures.
Discover Interlock Copper Roofing — engineered to last the lifetime of your home with zero maintenance and a Lifetime Transferable Warranty.
TL;DR Summary
Interlock® Copper Roofing is a residential roofing system manufactured from solid 16 oz or 20 oz architectural copper (Copper Alloy C11000, ASTM B370) — not copper-plated steel or foil. Available in four profiles (Slate, Cedar Shingle, Shake, Mediterranean Tile) plus Standing Seam, with documented service life exceeding 100 years, inherent Class A fire rating (ASTM E136), UL 2218 Class 4 hail, and 120 mph warranted wind.
Overview
What Is Copper Roofing?
Interlock® Copper Roofing is manufactured from solid 16 oz. or 20 oz. copper — not copper-plated steel, not copper foil — formed into the same interlocking geometries as the aluminum line: Slate, Cedar Shingle, Shake, and Mediterranean Tile. Hidden fasteners protect connection points on every profile. After installation, the roof evolves from bright mill-finish copper through warm bronze tones to a stable variegated verdigris over 30–35 years — a patina that is chemically protective, not merely decorative. Covered by the Guardian Lifetime Limited Non-Prorated Material Warranty.
Copper's service record is measured in centuries: the copper-clad cathedrals of Northern Europe and civic institutions worldwide carry roofing that has outlasted every other building material around it. The reason is elemental — copper does not rust or become brittle, and it naturally develops a patina as its weathered surface. Copper is not guaranteed against surface corrosion, and the rate and uniformity of patina vary with environmental and atmospheric conditions. At 100 lbs per square (16 oz.) or 125 lbs per square (20 oz. Mediterranean Tile), structural assessment is recommended for retrofit applications. Inherently non-combustible — no coating system required.
Why Homeowners Choose Copper Roofing Over Asphalt
Copper requires careful detailing: runoff will stain masonry and concrete if drainage is unmanaged, and incompatible metal contact creates galvanic corrosion — which is why Interlock specifies non-corrosive stainless steel hardware throughout and recommends professional installation via its dealer network. Patina accelerant solutions allow a fully weathered appearance at project completion. Installed correctly, copper will never need replacement, grows more architecturally distinctive as the structure ages, and retains significant material salvage value at any point in its life. For a generational roofing investment, no material qualifies more completely.
Table of Contents
- What Is Copper Roofing?
- Copper Roofing for Every Professional
- The Interlock Copper Roofing Advantage
- Why Solid Copper Roofing Outperforms Every Alternative
- Why a 48-Year Metal Roofing Coatings Veteran Endorses Interlock®
- Product Specifications
- Color Options
- Copper Roofing vs. Asphalt Shingles vs. Stone-Coated Steel
- Sustainability & Energy Efficiency
- What Homeowners Say About Interlock Metal Roofing
- Copper Roofing — Frequently Asked Questions
- Key Takeaways
Profiles
Copper Roofing Profiles
Copper Cedar Shingle Roofing The texture of split cedar shingle in 99.9% pure architectural copper — the warmth of cedar architecture rendered in a material that will not rot, split, burn, or require replacement. Backed by the Interlock® Lifetime Transferable Warranty. 
Copper Shake Roofing The deep relief of hand-split cedar shake in 99.9% pure architectural copper — architectural authenticity for lodge, mountain, ranch, and rustic estate architecture, in a material that will never rot, split, or burn. Backed by the Interlock® Lifetime Transferable Warranty. 
Copper Tile Roofing The rolled S-profile of clay barrel tile in 99.9% pure architectural copper — Mediterranean, Spanish Colonial, and Italianate architecture in a material whose service life is measured in centuries. Backed by the Interlock® Lifetime Transferable Warranty. 
Copper Slate Roofing The appearance of quarried natural slate in 99.9% pure architectural copper — engineered for heritage homes, civic landmarks, and generational residential architecture. Backed by the Interlock® Lifetime Transferable Warranty. 
Copper Standing Seam Roofing Architectural-grade vertical-rib standing seam in 99.9% pure architectural copper — the industry-standard profile for contemporary residential, civic, ecclesiastical, and architectural commercial roofing. Backed by the Interlock® Lifetime Transferable Warranty. Who It's For
Copper Roofing for Every Professional
Interlock Copper Roofing is the finest roofing material available — full stop. No other product combines multi-century service life, zero maintenance demand, and an evolving visual character that becomes more beautiful with age. Solid 16 oz. or 20 oz. copper panels develop a natural patina over 30–35 years, progressing from bright penny copper through bronze, brown, and ultimately verdigris green. Available in Slate, Cedar Shingle, Shake, and Mediterranean Tile profiles, Interlock Copper adapts to your home's architecture without compromise. It is 100% recyclable, requiring no chemical coatings and no eventual landfill contribution. The Guardian Lifetime Limited Non-Prorated Material Warranty covers Interlock Copper for the life of your structure. For homeowners who want the absolute best, copper is the only answer.
Get Your Free Quote →Interlock Copper Roofing is available in 16 oz. (approximately 100 lbs per square) and 20 oz. (approximately 125 lbs per square) solid copper, in Slate, Cedar Shingle, Shake, and Mediterranean Tile profiles. Specify CSI MasterFormat section per selected profile: 07 31 16 (Metal Shingles — Slate, Cedar Shingle) or 07 41 13 (Metal Roof Panels — Shake, Mediterranean Tile). No synthetic coating is applied. Copper's inherent antimicrobial properties and corrosion resistance eliminate coating specification requirements. Patina evolution — from bright copper through bronze, brown, and verdigris — occurs naturally over 30–35 years. Surface corrosion and patina uniformity are not warranted, consistent with industry-standard copper roofing practice. Class A fire rating is inherent to copper assemblies. Hidden fastener installation. Minimum slope: 4:12. The Guardian Lifetime Limited Non-Prorated Warranty covers Interlock Copper with noted material-specific exclusions. 100% recyclable. No VOC content.
Download Spec Sheet →Interlock Copper Roofing installs identically to Interlock aluminum panels in the same profile — same interlocking geometry, same hidden fastener approach, same installation sequences. Available in 16 oz. and 20 oz. copper in Slate, Cedar Shingle, Shake, and Mediterranean Tile profiles, panels arrive pre-formed and ready to install without field fabrication. Key jobsite considerations: Do not allow copper to contact aluminum or ferrous metals directly — use appropriate separation tape or gaskets at all contact points to prevent galvanic corrosion. Store panels flat and off the ground. Minimum slope: 4:12. No coatings, sealants, or touch-up compounds are required or recommended. The Guardian Lifetime Limited Non-Prorated Warranty covers installations completed per Interlock's certified documentation. Surface corrosion and patina uniformity are not warranted — communicate this clearly to project owners prior to sale.
Become a Certified Installer →Key Advantages
The Interlock Copper Roofing Advantage
Lifetime Transferable Warranty
Every Interlock installation is backed by a Lifetime Transferable Warranty — the strongest warranty in the roofing industry. Coverage can be transferred one time to the next owner (a $300 transfer fee applies), adding documented value at resale.
Explore now >Class 4 Impact Resistance
Achieves the highest UL 2218 impact rating — Class 4 — verified by the standard's most demanding 2-inch steel-ball impact test. Many insurers offer premium discounts for Class 4 rated roofing.
Explore now >Class A Fire Resistance available
Class A fire rating available under ASTM E108 — the highest fire resistance classification, subject to proper underlayment and installation. Superior protection compared to asphalt shingles and untreated wood profiles.
Explore now >120 MPH Wind Resistance
Interlock's concealed clip-fastening system locks every panel to the roof deck and to the panels around it, with no exposed fasteners that can loosen or back out over time. The system is warranted against wind uplift to 120 mph and tested to ASTM D3161 Class F, while the interlocking design lets panels expand and contract with temperature swings without breaking the weather seal — so the roof is built to stay secure through the high winds and seasonal storms common across North American climates.
Explore now >Energy-Efficient Aluminum
Aluminum reflects solar radiation and releases heat rapidly at night, reducing cooling loads and summer energy costs compared to dark asphalt roofing materials.
Explore now >Low Lifetime Maintenance
No painting, sealing, granule replacement, or re-nailing — ever. Occasional debris rinsing is all that is required. Eliminate roof maintenance from your budget permanently.
Explore now >AAMA 2605 Certified Coating System
Why Solid Copper Roofing Outperforms Every Alternative
Interlock Copper Roofing panels are crafted from solid, unalloyed architectural copper — one of the oldest and most revered roofing materials in recorded history. Unlike aluminum or steel roofing systems, copper requires no applied coating system. Its protection is inherent to the material itself. Available in 16 oz and 20 oz gauges, Interlock copper panels arrive in their characteristic bright warm tone and develop a living verdigris patina over 30 to 35 years of natural weathering. That patina is not deterioration — it is copper’s permanent corrosion barrier, forming a stable protective layer that actively resists moisture, UV radiation, and environmental degradation for centuries. A certified Green Roofing Product and infinitely recyclable, copper carries an inherent Class A fire rating with no chemical treatment required.
Layer 1 — Natural Copper Surface
The outermost surface of every Interlock Copper panel is the copper itself — solid architectural copper with no synthetic coating applied. Unlike PVDF-coated aluminum systems, copper does not require a factory finish. Its natural surface begins forming a stable copper oxide layer within months of installation, progressing over 30 to 35 years to the characteristic verdigris patina recognized as the hallmark of permanent architectural copper worldwide.
Layer 2 — Natural Oxide Formation
Within months of installation, atmospheric oxygen reacts with the copper surface to form copper oxide — a tightly bonded, self-limiting layer that serves as copper’s primary corrosion barrier. Unlike rust on ferrous metals, copper oxide is stable and protective, not destructive. This layer requires no applied primer or factory treatment — it is the natural electrochemical behavior of the material.
Layer 3 — Carbonate Patina Development
Over years of exposure to atmospheric moisture and CO₂, the copper oxide layer continues to evolve into copper carbonate compounds — the source of the distinctive blue-green verdigris patina. This patina layer is chemically stable, self-sealing, and has been documented to provide continuous corrosion protection for centuries on landmark buildings worldwide. It requires no maintenance, no reapplication, and no chemical treatment.
Layer 4 — Mill Precision Finishing
Before forming, each Interlock copper panel is sourced from mill-finished architectural copper sheet — produced to tight dimensional tolerances with a clean, consistent surface free from surface defects. Mill quality directly determines the uniformity of patina development across the installed roof surface. Interlock specifies architectural-grade copper to ensure even, aesthetically consistent weathering across every panel.
Layer 5 — Solid Copper Substrate
The structural foundation of every Interlock Copper panel is solid architectural copper — available in 16 oz (~100 lbs per square) and 20 oz (~125 lbs per square) gauges. Copper is a naturally pure, non-ferrous metal with inherent corrosion resistance, thermal stability, and structural integrity that requires no alloying additives or synthetic reinforcement. Its performance has been validated across centuries of architectural roofing applications on some of the world’s most recognized structures.
Layer 6 — Natural Rear Surface
Interlock Copper panels require no synthetic back coat. Solid copper is inherently non-reactive, non-ferrous, and corrosion-resistant on all exposed surfaces — including the underside. The natural copper rear face provides the same material integrity as the exterior surface, with no risk of galvanic corrosion, moisture infiltration, or coating delamination.
Industry Expert Testimonial
Why a 48-Year Metal Roofing Coatings Veteran Endorses Interlock®
“In my 48 years of experience in the metal roofing industry (21 years with Desoto, 10 years with Morton International, 6 years with BASF and 10 years with 3M), it is most unique to find a company who is constantly striving to provide roofing products that live up to claims that are being made to customers. From the very moment the Interlock Roofing System is applied to a home the customer experiences excellent installation and a very unique surface design all applied to the finest metal available. All these are provided with the promise of great durability and sustainability and a low maintenance roofing system. The use of Alunar(r) Coating Systems, which have a superior record of color fastness, chalk resistance and literal fusion like adhesion is the finest coating system anyone can provide.”
Robert Scichili
Robert Scichili Associates, Inc.
Independent testimonial from an industry expert. Robert Scichili is President of Robert Scichili Associates, Inc. (Richardson, TX) and Principal Partner at RSK Avanti Partners LLC — a strategic marketing, sales, and technical development consultancy for the metal construction and architectural coatings industries. He previously served as Business Development Manager for the Industrial Coatings Division at BASF Corporation, where he led market positioning for the Ultra-Cool reflective coatings line. Robert is a founding Board Member of the Cool Metal Roofing Coalition and a published authority on Energy Star, LEED, and cool metal roofing technologies. His 48-year career in industrial coatings spans Desoto, Morton International, BASF, and 3M.
Robert Scichili · President, Robert Scichili Associates, Inc. · 21 years Desoto · 10 years Morton International · 6 years BASF · 10 years 3M
Technical Data
Product Specifications
| Specification | Details |
|---|---|
| Base Material & Alloy Specification | Solid copper — 16 oz. or 20 oz. per sq ft. Not copper-plated, not copper foil. Hidden fastener system on all profiles |
| Panel Gauge & Nominal Base Thickness | 16 oz. copper = ~0.0216" (0.549mm); 20 oz. copper = ~0.027" (0.686mm). Expressed by weight designation per industry standard |
| Installed Weight Per Square | 16 oz. profiles: ~100 lbs per 100 sq ft; 20 oz. Mediterranean Tile: ~125 lbs per 100 sq ft |
| Hail Impact Resistance Rating | Class 4 — UL 2218 |
| Fire Resistance Rating | Class A fire rating available (requires GAF Versashield Fire-Resistant Roof Deck Protection per ICC-ES ESR-2053; self-adhered underlayment = non-classified assembly) |
| Wind Speed Resistance — Manufacturer Warranted | 120 mph (193 kph) — warranted per manufacturer's installation procedures |
| Surface Coating System & Finish Warranty | No coating applied — copper naturally tarnishes and develops a living patina: bright copper → bronze → variegated green. The rate and uniformity of patina vary with environmental and atmospheric conditions and are not guaranteed. Patina-accelerant solutions are available to achieve an aged appearance at installation |
| Panel Size, Weather Exposure & Coverage Geometry | Varies by profile — copper is available in all Interlock profile shapes (Slate, Cedar Shingle, Shake, Mediterranean Tile). Rustic Shake: 4 ft. panels with six shake impressions (relief height ¾" to 1⅜") |
| Material Warranty Program Name | Guardian Lifetime Limited Material Warranty — one-time transferable |
| Warranty Duration, Ownership Terms & Transferability | Lifetime for original registered owner (individual); 50 years from Substantial Completion for organizations or upon transfer to 2nd owner ($300 transfer fee) |
| Recycled Content & End-of-Life Recyclability | 100% recyclable — every ounce of copper is recycled due to its high salvage value. Classified as a Green Roofing Product |
| Cool Roof Energy Rating & Third-Party Certification | Cool Roof rated — CRRC (Cool Roof Rating Council) and ORNL (Oak Ridge National Laboratories) tested |
| CSI MasterFormat Division & Section Reference | 07 31 16 — Metal Shingles (Slate, Cedar, Diamond profiles); 07 41 13 — Metal Roof Panels (Shake, Tile profiles) |
Available Colors
Color Options
Interlock Solid Copper is offered as a single architectural specification rather than a color palette — because copper is not a finish applied to a substrate; it is the substrate. Every panel is roll-formed from 99.9% pure electrolytic tough-pitch copper (Copper Alloy C11000, conforming to ASTM B370 — the recognized North American standard for cold-rolled copper sheet in building applications). Color is intrinsic to the metal: there is no paint film, PVDF resin, stone granule, or organic binder to chalk, fade, peel, delaminate, or fail by UV exposure, because no such layer exists. What replaces a fixed color is a documented oxidation sequence — the same self-passivating chemistry that has preserved the cladding of the Statue of Liberty (1886), the U.S. Capitol Dome (1863), Christ Church Philadelphia (1727), and copper-roofed cathedrals across Europe in continuous service for more than eight hundred years. New Interlock copper arrives bright salmon-pink and progresses through measurable stages: russet bronze within weeks as cuprite (Cu₂O) forms; matte chocolate-brown tenorite (CuO) across one to three years; and ultimately the iconic verdigris green-blue — a stable copper-sulfate/hydroxysulfate stratum of brochantite (Cu₄SO₄(OH)₆), antlerite (Cu₃SO₄(OH)₄), and posnjakite (Cu₄SO₄(OH)₆·H₂O) that becomes the roof's own mineral protective barrier. Patina is not deterioration — it is the engineered service life of the material expressing itself. Solid copper panels are rated UL 790 Class A for external fire, UL 2218 Class 4 for impact (the highest classification issued, qualifying many homeowners for hail-related insurance premium credits), wind-uplift evaluated to ASTM E1592, and conform to the metal-roofing provisions of IBC §1507.4 and IRC §R905.10 under CSI MasterFormat 07 41 13 — Metal Roof Panels. Solar-array compatible, 100% recyclable at end-of-service, and free of fluoropolymers, plasticizers, and granular fillers, architectural copper is documented by the Copper Development Association as one of the most circular materials in the built environment and qualifies for applicable LEED Materials & Resources credit contributions and Environmental Product Declarations. Every Interlock copper installation is backed by the Interlock Lifetime Transferable Warranty, applied to a material whose verifiable service life is measured in centuries rather than decades — and engineered into Interlock's concealed-fastener interlocking panel geometry, the original North American permanent-metal residential roofing system, refined across six decades of continuous manufacture. Because copper is a single specification — not a palette — Interlock provides physical material samples rather than printed swatch cards, so homeowners, architects, and specifiers can evaluate gauge, weight, and authentic hand in person. Contact your local Interlock dealer to request a solid-copper sample, current gauge availability, panel profile drawings, fastener schedules, and full CSI 07 41 13 specification language ready for project submittal.
Material Comparison
Copper Roofing vs. Asphalt Shingles vs. Stone-Coated Steel
How does Interlock Copper Roofing compare on the metrics that matter most? Review the key performance differences below.
| Interlock Copper Roofing | Asphalt Shingles | Stone-Coated Steel | |
|---|---|---|---|
| Lifespan | 100+ years | 15-25 years | 40-50 years |
| Weight | ~100-125 lbs/square (16 oz / 20 oz) | 250-350 lbs/square | 140-180 lbs/square |
| Fire Rating | Class A (inherent / non-combustible) | Class A (with mat) | Class A |
| Warranty | Lifetime Transferable | 20-30 year limited | 30-50 year limited |
| Maintenance | Low maintenance | Periodic inspection | Periodic inspection (granule loss) |
Real Installations
Interlock Copper Roofing — Project Gallery
Interlock Copper Roofing is crafted from solid copper — a living material that arrives with a warm burnished penny tone and evolves through rich chocolate browns to the iconic verdigris patina that has defined premium architecture across Canada and the United States for centuries. Unlike coated aluminum systems, solid copper requires no paint or surface treatment to maintain its integrity; natural oxidation strengthens the material over time and produces a finish entirely unique to each home's climate, exposure, and environment. Backed by the Guardian Lifetime Limited 50-Year Transferable Warranty, an Interlock Copper roof is not just the last roof you'll install — it's the most unmistakable one on the street.
Environmental Performance
Sustainability & Energy Efficiency
Interlock Copper Roofing is the most sustainable premium roofing material available — a 100% natural, 100% recyclable solid copper product with no synthetic coatings, no chemical treatments, and no landfill contribution at end of life. Copper's multi-century service life produces the lowest embodied carbon per year of use of any roofing material on the market. Interlock Copper is certified as a Green Roofing Product, requires zero maintenance throughout its lifespan, and retains full material recovery value when eventually recycled. For architects, developers, and homeowners committed to genuine long-term environmental performance, Interlock Copper Roofing is the definitive sustainable roofing specification.
- 100% recyclable copper — zero landfill waste at end of life
- Copper patina is a natural, non-toxic surface process
- 100% recyclable at end of life
Customer Reviews
What Homeowners Say About Interlock Metal Roofing
★★★★★This is the 3rd roof I have had put on by Interlock Roofing. I put one on my original house, my cottage, and now my new house. They have always done an excellent job, and the aluminum shingles are a great product — light, sturdy, and good-looking, even years down the road.
★★★★★We had our roof replaced in 2017 with an aluminum roof by Interlock Metal Roofing. We live on the lake, and prior to the replacement, we were spending thousands of dollars every year as the shingles used to fly away in the wind. We have never had any problems in the last 9 years. We had a great experience with Interlock Metal Roofing. They were very professional and did a beautiful job, although it was difficult as our roof is quite high. Our roof is still beautiful, and we have never had a worry about it.
★★★★★I LOVE MY INTERLOCK ROOF! No more climbing up there to clean it off, no more gritty stuff falling into my garden after a few years. It looks fabulous and does what it's supposed to! And then there are the installers: knowledgeable, attentive to detail, and personable. Ivan is a gem! He attended to the addition of a small bit of flashing efficiently and cleaned the whole roof with a blower in short order. After almost ten years, it's STILL the only roof I would choose!
FAQ
Copper Roofing — Frequently Asked Questions
Everything you need to know about Interlock Copper Roofing — durability, cost, patina, and installation, answered for homeowners, architects, and contractors.
How long does a copper roof last?
Copper roofing is one of the longest-lasting roofing materials documented, with proven lifespans exceeding 100 years on historic structures. Interlock copper roofing systems are engineered to maintain structural integrity for the lifetime of the building, making them a genuine once-in-a-structure investment.
Does copper roofing turn green, and how long does it take?
Interlock Copper Roofing represents a premium investment reflecting the cost of solid copper as a raw material — priced significantly higher than aluminum and asphalt alternatives, consistent with copper's standing as the finest natural roofing material available. Exact pricing depends on gauge selection (16 oz. vs. 20 oz.), profile choice, roof complexity, and regional labor rates. Contact an authorized Interlock installer for a project-specific quote. Copper's multi-century service life, zero maintenance requirements, and inherent material value make it the definitive long-term roofing investment for homeowners who want the absolute best.
How much does copper roofing cost per square foot?
Copper roofing is a premium investment, typically ranging from $25-$50+ per square foot installed depending on profile, region, and project scope. On a total-cost-of-ownership basis over 100 years, copper is often comparable to or less expensive than multiple replacements of lower-cost materials.
Is copper roofing good for historic restoration?
Copper is the preferred material for historic preservation projects and is often required by preservation standards including the Secretary of the Interior's Standards for Rehabilitation. Interlock copper profiles are available in options suitable for both new construction and historic restoration applications.
How heavy is copper roofing?
Interlock aluminum panels weigh approximately 40-50 lbs per square (100 sq ft). This is a fraction of the weight of concrete tile (900+ lbs/sq) and natural slate (800-1,500 lbs/sq), making Interlock suitable for virtually any standard residential roof structure without structural reinforcement.
Can Interlock Copper Roofing be installed over my existing roof?
In many cases, yes — Interlock Copper panels can be installed over existing asphalt shingles without full tear-off, subject to local building code requirements, current layer count, and deck condition. Your authorized Interlock installer will inspect the existing decking to confirm eligibility. Because copper panels are heavier than aluminum — approximately 100 lbs per square (16 oz.) or 125 lbs per square (20 oz.) — a structural assessment is recommended on older or heavily loaded structures. Where tear-off is required, Interlock installers manage the complete removal process. Either way, the result is a roofing system designed for multi-century performance.
Is the copper patina uniform across the entire roof?
Patina development on copper is a natural process and is not uniform across all panels. Environmental exposure, slope, drainage patterns, shadow areas, and panel orientation all influence the rate and character of patina evolution. This natural variation is considered a signature characteristic of copper roofing — not a defect — and is expressly excluded from the Guardian Lifetime Limited Non-Prorated Warranty, consistent with industry-standard copper warranty practice. If visual uniformity is a design priority, discuss this with your authorized Interlock installer before product selection. Most copper roofing owners consider the evolving, non-uniform patina to be a defining part of copper's enduring aesthetic appeal.
What profiles is Interlock Copper Roofing available in?
Interlock Copper Roofing is available in four profiles: Slate, Cedar Shingle, Shake, and Mediterranean Tile. Each profile delivers the same solid copper material — 16 oz. for Slate, Cedar Shingle, and Shake; 20 oz. for Mediterranean Tile — with the same hidden fastener installation system. Profile selection allows the copper material to complement any architectural style, from traditional and craftsman to Mediterranean and European classical. Contact your authorized Interlock installer to review profile options and specify gauge based on your project's structural load and design requirements.
Is Interlock Copper Roofing fire rated?
Yes. Solid copper is inherently non-combustible, and Interlock Copper Roofing assemblies achieve Class A fire rating — the highest classification under UL and ICC standards. This rating is inherent to the copper material itself and does not require a specialized fire-resistant underlayment system to achieve Class A designation, unlike aluminum assemblies that require GAF Versashield for Class A classification. Confirm specific assembly requirements with your authorized Interlock installer and local building authority to ensure code compliance in your jurisdiction.
Can the Interlock Copper warranty be transferred to a new owner?
Yes. The Guardian Lifetime Limited Non-Prorated Material Warranty covering Interlock Copper Roofing is transferable once to a subsequent owner. Original individual owners hold a lifetime warranty; organizations and subsequent individual owners hold a 50-year non-prorated warranty. A $300 transfer fee applies, and transfer must be registered with Interlock Roofing within the required notification period. Note that the warranty expressly excludes surface corrosion and patina uniformity, which are natural characteristics of copper — not material defects. Contact Interlock Roofing directly to initiate the transfer process and obtain the current warranty transfer form.
At a Glance
Key Takeaways
- Solid 16 oz (~0.0216") or 20 oz (~0.027") architectural copper sheet — 99.9% pure C11000 per ASTM B370.
- Documented service life 100+ years (Christ Church Philadelphia, 1727; Statue of Liberty, 1886; U.S. Capitol Dome, 1863).
- Installed weight ~100–125 lbs/sq (16 oz) or up to 180 lbs/sq for tile profile — structural assessment recommended for retrofit.
- Inherent Class A fire rating per ASTM E136 (copper melts at 1,984°F) — no underlayment-dependent assembly required.
- UL 2218 Class 4 hail-rated and ASTM E1592 wind-uplift evaluated; 120 mph warranted wind resistance.
- Color is intrinsic to the metal — no PVDF coating, no granule layer; develops natural salmon-pink → bronze → verdigris patina over 30–35 years.
- 100% recyclable Green Roofing Product; CSI MasterFormat 07 41 13 (or 07 31 16 for Slate/Cedar profiles).
| 100+ YEAR documented service life | 100–180 LBS / SQ (profile-dependent) | INHERENT Class A fire (ASTM E136) | 120 MPH warranted wind |
Documentation
Downloads & Specification Resources
Explore More
Explore Other Interlock Roofing Profiles
Interlock® Metal Slate Roofing
Interlock® Metal Slate Roofing is a lifetime aluminum system that captures the dimensional beauty of natural slate — ideal for Colonial and Victorian homes — without the weight, cracking, or reinforcement costs of stone. Rust-proof, Alunar®-coated for energy savings, and backed by a transferable Lifetime Limited Warranty.
Interlock® Metal Cedar Shingle Roofing
Interlock® Metal Cedar Shingle Roofing is an aluminum shingle stamped with authentic cedar wood-grain texture — the warmth of real cedar with none of the rot, splitting, or discoloration. Rust-proof, virtually maintenance-free, Alunar®-coated, and backed by a transferable Lifetime Limited Warranty.
Interlock® Metal Shake Roofing
Interlock® Metal Shake Roofing recreates the deep, hand-split texture of rustic cedar shake in rust-proof aluminum — rugged character for Cape Cod and Craftsman homes without the warping, rot, or fire risk of wood. Alunar®-coated and backed by a transferable Lifetime Limited Warranty.
Interlock® Metal Tile Roofing
Interlock® Metal Tile Roofing brings the elegance of Mediterranean clay tile to homes that can't bear — or pay to reinforce for — real tile's weight. Lightweight, rust-proof aluminum that resists cracking, hail, and fire; Alunar®-coated and backed by a transferable Lifetime Limited Warranty.
Interlock® Metal Standing Seam Roofing
Interlock® Metal Standing Seam Roofing is a mechanical-lock aluminum panel system with clean vertical lines — the signature look of modern and farmhouse architecture. Concealed fasteners, exceptional wind resistance, rust-proof, solar-compatible, and backed by a transferable Lifetime Limited Warranty.
Get Started
Free, No-Obligation Interlock® Consultation
Every Interlock® consultation is free and carries no obligation — for homeowners, architects, and roofing contractors alike. Contact Interlock and a certified local sales representative from your exclusive Interlock® dealer will reach out to schedule a Zoom call, office meeting, or in-home consultation. The conversation walks through profile selection, technical installation requirements (slope, venting, underlayment, fasteners, trim, snow management, solar), and project-specific pricing — in that order, never the reverse.
For homeowners →
Review profile options, color samples, and the Guardian Lifetime Transferable Warranty applied to your specific home.
For architects →
Walk through CSI MasterFormat 07 31 16 / 07 41 13 specifications, ICC-ES ESR-1790 documentation, and assembly options for your project submittal.
For roofing contractors →
Discuss certified-installer territory, training, technical support, and warranty registration through the Interlock® dealer network.
Prefer to talk? 1-866-733-5811
Request Your Free Quote
A specialist will match you with your local certified Interlock® installer.