Metal Roofing Products

Interlock® Metal Cedar Shingle Roofing: Lifetime Aluminum, Rot-Free Cedar Look

Name: Metal Cedar Shingle Roofing
Brand: Interlock®
Rating: 4.9 (1847 reviews)

Interlock cedar shingle roofing delivers the warm, dimensional look of real cedar without rot, splitting, or fire risk — backed by a Lifetime Transferable Warranty.

Discover Interlock Metal Cedar Shingle Roofing — engineered to last the lifetime of your home with zero maintenance and a Lifetime Transferable Warranty.

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Metal Cedar Shingle Roofing | Class 4 Hail · Lifetime Warranty | Interlock Roofing

Overview

What Is Metal Cedar Shingle Roofing?

Interlock® Metal Cedar Shingle Roofing replicates the dimensionality and shadow lines of hand-split wood cedar in a 0.019" 3105-H24 aluminum panel at approximately 41 lbs per square — with no splitting, warping, moss treatment, or fire retardant maintenance cycle. Finished with the Alunar® Coating System and carrying a 30-year coating warranty, it is rated Class 4 under UL 2218, warranted to 120 mph wind resistance, and backed by the Guardian Lifetime Limited Non-Prorated Material Warranty. Certifications include ICC-ES ESR-1790, Florida Product Approval FL7263, and CCMC 10475-R.

Natural cedar shingles carry a service life of 20–30 years — compressed by UV degradation, moisture cycling, moss growth, and the fire risk inherent to organic roofing. Interlock Metal Cedar Shingle eliminates every failure mode: the aluminum substrate will not absorb moisture, support biological growth, or propagate flame. The 17⅝" × 9" panel installs on slopes of 3:12 or greater with ice and water protection, with a full color-matched trim suite requiring no field-fabricated flashing. Cool Roof rated by CRRC and ORNL, it delivers the curb appeal of cedar with a performance envelope wood cannot match.

Where Class 4 impact ratings qualify for insurance premium reductions, annual savings compound across the full warranty period — a recurring financial return most roofing products cannot claim. The transferable Guardian Warranty documents itself in any real estate transaction, distinguishing the property in markets where buyers scrutinize roof age and remaining useful life. Each installation eliminates two to three cedar or asphalt replacement cycles from the landfill. For homeowners who refuse to compromise on aesthetics or performance, Interlock Metal Cedar Shingle is the definitive answer — the look of cedar, the permanence of metal.

Who It's For

Metal Cedar Shingle Roofing for Every Professional

Interlock Metal Cedar Shingle Roofing gives your home the warm, dimensional character of hand-split cedar — permanently. Where real cedar fades, splits, and requires staining or replacement within 15–20 years, Interlock aluminum panels hold their form and color for a lifetime. Finished with the Alunar® 5-layer fluorocarbon coating system, each panel resists UV fading, moisture infiltration, and hail impact up to 2 inches in diameter (UL 2218 Class 4). Your home is warranted against winds up to 120 mph — all backed by the Guardian Lifetime Limited Non-Prorated Material Warranty. Install it once. Forget it exists. That's the Interlock promise: permanent protection in a profile that makes your home look exactly the way you envisioned it — for the rest of your life.

Interlock Metal Cedar Shingle is specified under CSI MasterFormat Section 07 31 16 (Metal Shingles). The 0.019-inch aluminum alloy 3105-H24 panel (ASTM B209) installs at approximately 40–50 lbs per square, meeting standard residential structural load requirements without modification. Panel dimensions: 17⅝" × 9" face. The Alunar® 5-layer fluorocarbon coating system delivers PVDF-grade durability per ASTM D-4214-07 (chalk) and ASTM D-2244-16 (color). Cool Roof performance is CRRC- and ORNL-confirmed. ICC-ES Evaluation Report ESR-1790 and Florida Product Approval FL7263-R7 (NON-HVHZ) apply. Minimum slope: 3:12 with ice-and-water underlayment; 5:12 with standard underlayment. Class A fire rating available per ESR-1790 §4.4 with GAF Versashield per ESR-2053. UL 2218 Class 4 impact resistance. Wind warranted to 120 mph under the Guardian Lifetime Limited Non-Prorated Warranty. 30-year coating warranty. One-time transferable.

Interlock Metal Cedar Shingle installs over standard OSB or plywood decking with no specialized equipment. The 17⅝" × 9" aluminum panel interlocks along all four edges, creating a weather-sealed assembly that self-aligns during installation. Panel weight of approximately 40–50 lbs per square minimizes crew fatigue on large projects and eliminates structural pre-loading concerns. The Alunar® coated aluminum surface requires no special handling beyond standard sheet metal protocols. Minimum slope: 3:12 with ice-and-water barrier; 5:12 with standard underlayment. No caulking, no sealants, no recoating — on installation day or any day after. Interlock Cedar Shingle carries ICC-ES ESR-1790 for code-compliant installation in applicable jurisdictions. All installation documentation, underlayment specifications, and fastening schedules are provided in Interlock's certified installation manual.

KEY ADVANTAGES

The Interlock Metal Cedar Shingle Roofing Advantage

Lifetime Transferable Warranty

Every Interlock installation is backed by a Lifetime Transferable Warranty — the strongest warranty in the roofing industry. Coverage transfers to subsequent owners at resale.

Class 4 Impact Resistance

Achieves the highest UL 2218 impact rating — Class 4 — withstanding hailstones up to 2 inches. Many insurers offer premium discounts for Class 4 rated roofing.

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.

120+ MPH Wind Resistance

The four-way interlocking system creates a unified surface resisting hurricane-force wind uplift. No exposed fastener points means no fastener-failure leak risk.

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.

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.

AAMA 2605 Certified Coating System

The Alunar® Coating System

Every Interlock Metal Cedar Shingle panel is factory-finished with the proprietary Alunar® Coating System — a 5-stage molecular bonding process engineered to the most demanding performance standards for architectural coatings in North America. At its core, Alunar uses a 70% polyvinylidene fluoride (PVDF) fluoropolymer resin system — the same chemistry trusted by monumental and commercial building projects across the continent. Unlike painted steel or granule-coated asphalt products, PVDF fluoropolymer chemistry does not fade, chalk, peel, or blister. Colour stability is independently verified to ASTM D-4214-07 (chalk resistance) and ASTM D-2244-16 (colour retention) — requiring less than 5 Delta E units of colour change after a decade of continuous UV exposure. Your roof’s colour is not applied to the surface — it is bonded into it. That is the difference between a finish that lasts 20 years and one that lasts a lifetime.

Layer 1 — Alunar® Coating System (PVDF Top Coat)

The outermost layer is Interlock’s proprietary Alunar fluoropolymer finish — formulated with 70% polyvinylidene fluoride (PVDF) resin and independently verified to ASTM D-4214-07 for chalk resistance and ASTM D-2244-16 for colour retention. This layer delivers colour stability confirmed to less than 5 Delta E colour change after ten years of continuous UV exposure. It is the permanent face of your roof.

Layer 2 — Primer Base Coat

A precision-applied primer layer bonds directly to the treated aluminum surface, creating the adhesion foundation that locks every subsequent layer in place. This primer is the structural bridge between the metal substrate and the PVDF colour system — without it, no coating chemistry performs to specification.

Layer 3 — Conversion Coating

A chemical conversion treatment restructures the aluminum surface at the molecular level — transforming it from a passive metal into an active bonding substrate. This layer is critical to corrosion resistance and long-term coating adhesion, and is what separates an architectural-grade finish from a standard painted surface.

Layer 4 — Alkaline Cleansed

Before any coating is applied, each aluminum panel undergoes a multi-stage alkaline cleaning process that removes surface oxides, mill oils, and microscopic contaminants. This step is non-negotiable — surface cleanliness at this stage directly determines the lifespan of every layer above it.

Layer 5 — Aluminum Substrate

The structural foundation of every Interlock Metal Cedar Shingle panel — 3105-H24 aluminum alloy, selected for its superior formability, corrosion resistance, and long-term dimensional stability. At approximately 40–50 lbs per square, it is seven times lighter than natural slate and requires no structural reinforcement on standard roof framing.

Layer 6 — Back Coat

An applied protective coating on the underside of every panel guards against moisture infiltration, condensation, and galvanic corrosion from below. Most roofing products leave the back face uncoated. Interlock does not — because a lifetime warranty requires protection on all six sides of the panel.

Technical Data

Product Specifications

Specification	Details
Base Material & Alloy Specification	Aluminum alloy 3105-H24 per ASTM B209
Panel Gauge & Nominal Base Thickness	0.019" (0.483 mm) nominal base thickness
Installed Weight Per Square	Approx. 41 lbs per 100 sq ft (0.41 psf installed)
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	Alunar® Coating System — 5-layer fluorocarbon finish; 30-year coating warranty (no chalk >8 ASTM D-4214-07; no color change >5 ΔE ASTM D-2244-16)
Panel Size, Weather Exposure & Coverage Geometry	17⅝" wide × 9" weather exposure per course
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	Aluminum is 100% recyclable at end of life
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

Available Colors

Color Options

Interlock Metal Cedar Shingle is available in eight architect-curated colors in heavy gauge aluminum — each permanently bonded through the Alunar® PVDF fluoropolymer coating system, certified to AAMA 2605, the most demanding color performance standard in North American architecture. Unlike paint-over-steel or granule-coated products that fade, chalk, or shed over time, Alunar’s 70% PVDF resin chemistry is backed by a 30-year color warranty — guaranteeing chalk resistance no worse than a numerical rating of 8 per ASTM D-4214 and color change no greater than 5 Hunter ΔE units per ASTM D-2244. That is not a marketing claim — it is a measured, testable, warranted performance threshold. For projects demanding the ultimate in prestige and material authenticity, Interlock Metal Cedar Shingle is also available in solid copper — a ninth option that develops a natural living patina unique to every installation. Whether you select a factory-finished aluminum color or the timeless warmth of solid copper, every panel is backed by Interlock’s Lifetime Transferable Warranty. Contact your local Interlock dealer to request a physical color sample and full specification sheet.

Material Comparison

Metal Cedar Shingle Roofing vs. Asphalt Shingles vs. Real Cedar Shingles

How does Interlock Metal Cedar Shingle Roofing compare on the metrics that matter most? Review the key performance differences below.

Specification	Interlock Metal Cedar Shingle Roofing	Asphalt Shingles	Real Cedar Shingles
Lifespan	Lifetime (50+ years)	15-25 years	20-40 years
Weight	40-50 lbs/square	250-350 lbs/square	200-350 lbs/square
Fire Rating	Class A	Class A (with mat)	Class C (untreated)
Warranty	Lifetime Transferable	20-30 year limited	Limited or none
Maintenance	Low maintenance	Periodic inspection	Regular maintenance

Environmental Performance

Sustainability & Energy Efficiency

Interlock Metal Cedar Shingle delivers the aesthetic of natural cedar without the ecological cost of harvesting old-growth timber. Manufactured from aluminum — one of the most sustainable structural materials available — panels are 100% recyclable at end of life with no material quality degradation and contain a high percentage of post-industrial recycled content. Its permanent service life eliminates the repeated manufacturing, transport, and landfill burden of real cedar replacement. Cool Roof certification from CRRC and ORNL confirms measurable energy efficiency benefits. For architects and homeowners committed to responsible material selection, Interlock Metal Cedar Shingle is the verifiable sustainable alternative.

Interlock Metal Cedar Shingle may contribute to LEED v4 credits under Materials & Resources (MR) — Recycled Content, and Energy & Atmosphere — Enhanced Energy Performance. Contact your Interlock dealer for LEED documentation support.

Verified 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.

Bruce M.Wakefield, MA

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.

Beena M.Sudbury, ON

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!

Sue Lyn T.Corvallis, OR

FAQ

Metal Cedar Shingle Roofing — Frequently Asked Questions

How long does metal cedar shingle roofing last?

Interlock Metal Cedar Shingle Roofing is backed by a Lifetime Transferable Warranty, designed to outlast the structure it covers. Unlike asphalt shingles that require replacement every 15-25 years, Interlock aluminum panels resist corrosion, impact, and freeze-thaw cycling without degrading.

How much does metal cedar shingle roofing cost?

Interlock Metal Cedar Shingle Roofing costs more upfront than asphalt or real wood cedar, reflecting lifetime performance. When measured over 50 years, Interlock eliminates 3–5 asphalt replacement cycles and the ongoing maintenance costs of real cedar — staining, treating, and eventual full tear-off. Exact pricing depends on roof complexity, regional labor rates, and underlayment requirements. Contact an authorized Interlock installer for a project-specific quote. Most homeowners recoup the cost differential within 10–15 years through eliminated replacements and maintenance savings alone.

Is metal cedar shingle roofing energy efficient?

Yes. Interlock aluminum panels reflect solar radiation and release absorbed heat rapidly after sunset, reducing attic temperatures and HVAC cooling loads compared to dark asphalt shingles. Most homeowners report measurable reductions in summer cooling costs.

What maintenance does metal cedar shingle roofing require?

Virtually none. No painting, sealing, re-granulating, or re-nailing is ever required. Occasional rinsing to remove debris from valleys is all that is typically needed. Interlock eliminates roof maintenance from your annual budget.

How heavy is metal cedar shingle 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 roofing be installed over my existing roof?

In many cases, yes — Interlock aluminum roofing can be installed over existing asphalt shingles without full tear-off, depending on local building codes, deck condition, and current roof layer count. Your authorized Interlock installer will conduct a decking inspection to confirm eligibility. Installing over existing roofing eliminates tear-off labor and disposal costs, reducing overall project expense. Where tear-off is required — due to soft decking, rot, or code restrictions on roof layers — Interlock installers manage the full removal process. Either way, the result is a permanent roofing system that will never need to be removed or replaced.

Does Interlock roofing qualify for home insurance discounts?

Yes — in many regions, Interlock aluminum roofing’s UL 2218 Class 4 hail impact rating and 120 mph warranted wind resistance qualify homeowners for significant insurance premium reductions. Discount amounts vary by insurance carrier and jurisdiction, but Class 4 impact-rated roofing consistently triggers meaningful savings in hail-prone markets across North America. Contact your insurance provider to confirm available discounts before installation. Many homeowners find that insurance savings offset a meaningful portion of the installation cost premium within the first 10–15 years of ownership.

What colors is Interlock Metal Cedar Shingle available in?

Interlock Metal Cedar Shingle Roofing is available in nine standard colors: Solid Copper, Copper Penny, Hunter Green, Black, Deep Charcoal, Musket Grey, Tile Red, Colonial Brown, and Tudor Brown. All colors are finished with the Alunar® 5-layer fluorocarbon coating system, providing PVDF-grade color stability backed by a 30-year coating warranty per ASTM D-4214-07 and ASTM D-2244-16. Colors complement a full range of architectural styles and exterior palettes. Contact your authorized Interlock installer or visit the Interlock color selector to view samples in your regional lighting conditions before finalizing your selection.

Is Interlock Metal Cedar Shingle fire rated?

Yes. Interlock Metal Cedar Shingle panels are available in a Class A fire-rated assembly — the highest rating achievable under UL and ICC standards. Class A requires installation with GAF Versashield fire-resistant underlayment per ICC-ES Evaluation Report ESR-2053, in combination with the Interlock panel system per ESR-1790. Note: installation with self-adhered underlayment results in a non-classified fire assembly. Specify GAF Versashield when Class A fire rating is required by code or insurance. Confirm your underlayment specification with your authorized installer before project commencement.

Can the Interlock warranty be transferred to a new owner?

Yes. The Guardian Lifetime Limited Non-Prorated Material Warranty 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 transfer fee of $300 applies, and transfer must be registered with Interlock Roofing within the required notification period. A documented Interlock roofing system with an active warranty adds measurable, verifiable value in real estate transactions. Contact Interlock Roofing directly to initiate the transfer process.

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Last modified: May 21, 2026 10:17 pm