Aluminum Siding & Wall Cladding
Metal Siding & Aluminum Wall Cladding
Interlock® aluminum siding wraps your walls in the same lifetime, never-rust, never-repaint system as our roofs — interlocking panels in Slate, Cedar Shingle, Shake, and Standing Seam profiles, finished in the Alunar® Coating System.
Engineered and installed across the U.S. and Canada, with a Class A fire rating available, a transferable 50-year limited warranty, and an exact color and trim match to your Interlock® roof.
TL;DR Summary
Interlock® metal siding is precision-formed aluminum wall cladding made from the same panels, coating, colors, and trims as our roofing systems. It won’t rot, warp, crack, or need repainting; it resists fire, insects, and coastal salt; and it installs over most existing walls. Choose Slate, Cedar Shingle, Shake, or Standing Seam profiles in the full Alunar® color range — backed by a transferable 50-year limited warranty.
Overview
What is Interlock® metal siding?
Interlock® metal siding — also called aluminum wall cladding — is a lifetime exterior wall system formed from heavy-gauge aluminum and finished with the Alunar® Coating System, the identical material, colors, and trims used on Interlock® roofs. Four-way interlocking panels create a wind-resistant, rain-screen-style skin that installs over most existing wall substrates.
Because siding and roofing share one material system, you can wrap an entire home — roof, chimneys, dormers, gables, and walls — in a single, color-matched, maintenance-free finish that lasts for decades.
Available profiles
Interlock® siding is offered in the same architectural profiles as our roofing line: Slate, Cedar Shingle, Shake, and Standing Seam. Mix profiles — for example, Shake on a chimney and Standing Seam on a wall — for custom architectural detail, all within one color family.
Key Advantages
Why homeowners choose aluminum siding
Never rot, warp, or crack
Aluminum doesn’t absorb moisture, so it won’t rot like wood or crack and crumble like fiber cement and stucco — even through repeated freeze-thaw cycles.
Never repaint
The baked-on Alunar® Coating System resists chalking and fading, so the color you choose is the color it keeps — no scraping, priming, or repainting.
Fire and ember resistant
Non-combustible aluminum with a Class A fire rating available — a meaningful advantage in wildfire and ember-zone regions.
Explore now >Lightweight, installs over most walls
At a fraction of the weight of fiber cement or masonry, panels install over most existing substrates with no heavy tear-off.
Matches your Interlock® roof
Identical colors, coating, and trims mean siding and roof read as one continuous, intentional design.
Explore now >Coastal and pest proof
Aluminum won’t host insects or carpenter ants and resists salt-air corrosion, making it ideal for coastal and lakeside homes.
Technical Data
Metal Siding: Technical Specifications
| Specification | Details |
|---|---|
| Material | Heavy-gauge aluminum — the same substrate as Interlock® roofing panels |
| Finish | Alunar® Coating System: multi-layer architectural coating with Cool Roof IR-reflective pigments |
| Profiles | Slate, Cedar Shingle, Shake, Standing Seam |
| Colors & trims | Full Interlock® color range with matching flashings and trims — identical to the roofing line |
| Fire | Class A fire rating available; non-combustible aluminum |
| Warranty | Transferable 50-year limited warranty |
| Sustainability | Largely recycled aluminum content; roughly 95% recyclable at end of life |
| Installation | Four-way interlocking panels installed over most existing wall substrates by certified installers |
| Maintenance | No painting, sealing, or staining — a periodic rinse is all that’s needed |
Material Comparison
Aluminum Siding vs. Other Cladding
How Interlock® aluminum siding compares with the most common exterior wall materials.
| Interlock® Metal Siding | Fiber Cement | Vinyl | Wood / Cedar | |
|---|---|---|---|---|
| Expected lifespan | 50+ years | 20–40 years | 20–30 years | 15–40 years |
| Repainting | Never — baked-on finish | Every 7–15 years | Not paintable; can fade | Every 3–7 years |
| Rot / moisture | Immune (aluminum) | Can crack / absorb | Can crack in cold | Rots, warps |
| Fire | Non-combustible; Class A avail. | Non-combustible | Combustible | Combustible |
| Weight | Light | Heavy | Light | Medium |
| Insects / pests | Won’t host pests | Won’t host pests | Won’t host pests | Vulnerable |
| Roof match | Exact (same system) | No | No | No |
Environmental Performance
Sustainability: Built Green by Design
Aluminum is one of the most recycled building materials in the world, and an Interlock® wall is built to last a lifetime rather than be torn off and landfilled.
- Largely recycled aluminum content
- Roughly 95% recyclable at end of life
- Cool Roof IR-reflective pigments reduce solar heat gain on walls
- No paints, solvents, or sealants required over its service life
FAQ
Metal Siding — Frequently Asked Questions
Is metal siding the same as the metal roof?
Yes. Interlock® siding uses the same aluminum panels, the same Alunar® Coating System, and the same colors and trims as our roofing systems. The profiles — Slate, Cedar Shingle, Shake, and Standing Seam — are shared, so your siding and roof match exactly.
Will metal siding rust or need repainting?
No. The panels are aluminum, which does not rust, and the factory-baked Alunar® coating resists chalking and fading — so it never needs scraping, priming, or repainting.
Can I install metal siding over my existing walls?
In most cases, yes. The lightweight interlocking panels install over most existing wall substrates, fitted by certified Interlock® installers, usually with no heavy tear-off.
Is metal siding fire-resistant?
Aluminum is non-combustible, and a Class A fire rating is available — a meaningful advantage in wildfire and ember-prone regions.
What profiles and colors are available?
Slate, Cedar Shingle, Shake, and Standing Seam, in the full Interlock® color range with matching flashings and trims — identical to the roofing line. See the Interlock® color guide.
Does metal siding dent or get noisy?
Heavy-gauge aluminum and the interlocking, fastened-to-the-wall design resist denting, and because the panels are fixed to the substrate the cladding is no louder than conventional siding.
Is there a warranty?
Yes — a transferable 50-year limited warranty, the same lifetime backing as Interlock® roofing.
Where is Interlock® siding available?
Across the United States and Canada through certified local installers. Real installations include custom homes in Whistler, BC.
At a Glance
Key Takeaways
- Interlock® metal siding is aluminum wall cladding using the same panels, coating, colors, and trims as Interlock® roofing.
- It never rots, warps, cracks, or needs repainting, and a Class A fire rating is available.
- Profiles: Slate, Cedar Shingle, Shake, and Standing Seam — mix-and-match within one color family.
- Installs over most existing walls; lightweight; coastal- and pest-resistant.
- Backed by a transferable 50-year limited warranty.
Get Started
Wrap Your Home in One Lifetime Finish
Match your walls to your Interlock® roof with siding that never needs repainting. Request a free, no-obligation quote from your local certified installer.
Homeowners
A color- and trim-matched siding-and-roof system, installed by certified crews.
Architects & builders
Specify one aluminum material system across roof and wall, in shared profiles and colors.
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