Product Brochure
The official Interlock® product brochure — five architectural aluminum profiles finished with the Alunar® Coating System, engineered and tested to last a lifetime. Read it inline below or download the full PDF.
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Why choose an Interlock® lifetime roof?
Interlock® roofing systems are built to last — strong, lightweight, environmentally friendly and solar compatible. For most homeowners, an Interlock roof is the last roof they will ever need.
- Performance & durability — tested to withstand severe weather and naturally resistant to fire.
- Energy efficient — lowers inside temperatures and cooling costs (per Cool Roof Rating Council and Oak Ridge National Laboratory testing).
- Lifetime limited warranty — one-time transferable (50-year coverage on transfer).
- Environmentally conscious — solar compatible, made with recyclable aluminum, helping end the landfill cycle of failed roofing.
The profiles
Interlock® Slate
The elegance of slate without the weight. Real slate is heavy and often needs structural reinforcement — Interlock® Slate gives you the look, protection and longevity without it.
- Four-way interlocking connection on all sides
- UL 2218 Class 4 hail (highest rating)
- Naturally fire resistant — no cracking or splitting
- Removes the need to reinforce your home for weight
- Lifetime limited warranty
Interlock® Cedar Shingle
Crafted to resemble thin-cut wood shingles, embossed with a heavy grain texture and interlocked four ways, then finished with the Alunar® Coating System.
- High-velocity wind tested
- UL 2218 Class 4 hail (highest rating)
- No curling, cracking, rotting or splitting
- Can be installed over existing roofing
- Lifetime limited warranty
Interlock® Cedar Shake
The beauty of real shake with lifetime performance. A two-way interlocking panel, embossed with a natural heavy-grain texture and Alunar®-coated. Never splits, warps, cracks or rots.
- High-velocity wind tested
- UL 2218 Class 4 hail (highest rating)
- Naturally fire resistant
- No yearly maintenance like hand-split shake
- Environmentally sustainable / recyclable
Interlock® Mediterranean Tile
The luxurious look of traditional Mediterranean tile without the weight — about 90% lighter than concrete or clay, so there is no need to reinforce your structure (important in earthquake zones).
- Hidden fastener system (no exposed screws on panels)
- UL 2218 Class 4 hail (highest rating)
- Will not crack
- Lightweight — no structural reinforcement needed
- Extremely weather resistant
Interlock® Standing Seam
The classic, clean look of metal roofing with long, dramatic shadow lines. Mechanically locked interlocking panels are weathertight, with protective coating on both sides — ideal for coastal salt air. Curved and tapered profiles available for custom details.
- Wide range of colors
- Aluminum will not corrode like steel
- Coated on both sides for extra protection
- Solar compatible
- Lifetime limited warranty
Interlock® Solid Copper
A premium option that patinas over time for a beautiful, timeless look — available across profiles and matched with top-quality accessories.
- Solid copper, premium architectural finish
- Develops a natural patina over time
- Backed by Interlock® quality accessories
The Interlock® advantage
Naturally fire-resistant and tested for extreme weather (UL 2218 Class 4 hail; hurricane-force winds when installed per Interlock installation instructions). Improves curb appeal for decades with no curling, cracking, splitting or rotting, plus a color-fade warranty. Can save on air-conditioning costs and may qualify for home-insurance discounts. Protective coating on both sides for lasting peace of mind — the last roof you will ever need.
Designer colors
Interlock® roofs are protected for a lifetime by the exclusive Alunar® Coating System, available in a palette of designer colors including Solid Copper, Copper Penny, Musket Grey, Black, Deep Charcoal, Tudor Brown, Tile Red, Hunter Green and Colonial Brown. Actual color may vary from sample; colors and availability may change without notice.
Brochure — frequently asked questions
What is Interlock metal roofing, and what styles does it come in?
Interlock is a premium aluminum metal roofing system engineered and tested to last a lifetime — the basis of its "Never Re-Roof Again.®" promise. It comes in five architectural profiles — Slate, Cedar Shingle, Cedar Shake, Mediterranean Tile and Standing Seam — plus solid copper, each finished with the low-gloss Alunar® Coating System, giving the look of slate, cedar or tile without the weight, maintenance or limited lifespan.
How long does an Interlock metal roof last?
Interlock aluminum roofing is engineered to last a lifetime — for most homeowners it is the last roof they will ever install. Asphalt shingles typically last only 15–25 years, so a homeowner often replaces asphalt two to four times over the life of a single Interlock roof. Aluminum does not rot, rust, crack or burn, and the Alunar® finish resists fading.
How much does a metal roof cost, and is it worth it?
A premium aluminum roof costs more upfront than asphalt but is designed to pay for itself by eliminating repeated tear-offs, lowering energy bills, and often reducing insurance premiums. Because asphalt must be replaced every 15–25 years, the lifetime cost of one Interlock roof is frequently lower than several asphalt roofs. Request a free quote for figures specific to your home.
How does Interlock compare to asphalt shingles?
Asphalt is inexpensive upfront but degrades under UV, thermal cycling and storms, usually needing replacement within 15–25 years. Interlock’s interlocking aluminum panels won’t crack, curl, rot or shed granules, hold a UL 2218 Class 4 (highest) impact rating, and are backed by a transferable lifetime limited warranty — with slate, shake, tile or standing-seam styling asphalt can only imitate.
Is the warranty transferable if I sell my home?
Yes — Interlock’s Guardian lifetime limited material warranty is one-time transferable to the next homeowner, with 50-year coverage extended on transfer. A transferable lifetime roof is a documented selling feature that can strengthen resale value. Full terms are in the Guardian Warranty document.
Is a metal roof energy efficient, and can it lower my bills?
Yes — Interlock roofs are Cool Roof rated (verified under the CRRC program and ORNL testing), reflecting solar heat to reduce attic temperatures and cooling demand. Reflective colors may qualify for ENERGY STAR or local energy-code credits; specific solar-reflectance and emittance values are published in Interlock’s reflectance data sheet.
Can I add solar panels to an Interlock roof?
Yes — Interlock is engineered as a practical platform for solar. Because the roof itself lasts a lifetime, you avoid removing and reinstalling a solar array to replace a failing asphalt roof beneath it, making lifetime aluminum roofing a natural long-term pairing with a solar investment.
Are metal roofs noisy in the rain, or do they attract lightning?
No to both myths. Installed over solid sheathing and synthetic underlayment as Interlock specifies, an aluminum roof is no louder in rain than asphalt. Metal roofing does not attract lightning, and because aluminum is non-combustible, a metal roof is a safer surface than wood or asphalt in the rare event of a strike or nearby fire.
© The Interlock Group. Interlock®, Interlock Lifetime Roofing Systems®, Alunar®, and Never Re-Roof Again.® are registered trademarks of I.E.L. Manufacturing Ltd., used under license. For more information call 1-866-780-8247 or request a free quote.