A slate metal roof is metal roofing stamped or molded to mimic natural slate, sold in three real forms: pressed aluminum shingles, pressed steel shingles, and stone-coated steel panels. It delivers the slate profile at roughly 1 pound per square foot instead of the 8 to 15 pounds a quarried slate roof loads onto your framing, carries a Class 4 impact rating, and costs a fraction of real slate while lasting 50 years or more. This guide separates the product types most articles blur together, gives real per-square cost bands, and shows how metal slate compares to both natural slate and synthetic composite slate.
What is a slate metal roof?
A slate metal roof is metal roofing shaped to replicate the dimensional look of natural slate tiles. Manufacturers press aluminum or steel into shingle panels with slate texture and multi-tone color, or bond crushed stone granules to a formed steel panel. From the ground a quality metal slate roof is hard to tell apart from quarried slate, but it weighs about a tenth as much and will not crack under hail or a footstep.
The look comes from stamping dies taken off real slate, plus blended color coats that copy the gray, black, green, and purple tones of natural stone. Named products in this category include EDCO ArrowLine Slate, Classic Metal Roofing Systems Oxford Slate, Matterhorn Slate, and stone-coated lines such as DECRA and Unified Steel. Standing seam and plain corrugated panels are also metal, but they do not read as slate, so they sit outside this category.
Types of metal roofing that looks like slate
Three product types make up nearly every slate metal roof. Pressed aluminum shingles are the lightest and rust-proof. Pressed steel shingles cost less and hold a crisp stamped edge. Stone-coated steel adds a granular surface for a more textured, matte finish. Each ships as interlocking panels that hide fasteners, unlike exposed-fastener corrugated metal.
| Type | Weight | Finish | Example brands | Material cost per sq ft |
|---|---|---|---|---|
| Pressed aluminum shingle | About 0.5 lb | Painted, smooth to lightly textured | Classic Oxford Slate, Interlock | $4 to $8 |
| Pressed steel shingle | About 1 lb | Painted, stamped slate edge | EDCO ArrowLine Slate, Matterhorn Slate | $3.50 to $7 |
| Stone-coated steel | About 1.5 lb | Granular, matte | DECRA, Unified Steel | $4 to $9 |
Aluminum suits coastal and high-salt areas because it never rusts. Steel costs less per square and resists denting slightly better on the thicker gauges. Stone-coated steel trades a little of the sharp slate edge for a granular texture that muffles rain noise and hides minor surface marks. For a wider view of panel and profile options, see our guide to metal roofing types.
How much does a slate metal roof cost?
A slate metal roof runs about $12 to $22 per square foot installed, or $1,200 to $2,200 per roofing square of 100 square feet, which is roughly 2 to 3 times the cost of an asphalt shingle roof. Material alone lands between $3.50 and $9 per square foot. Stone-coated brands like DECRA can push installed pricing toward $17 to $30 per square foot on complex roofs, while real slate starts near $20 and climbs past $40.
| Roof material | Installed cost per sq ft | Per square (100 sq ft) | Typical lifespan |
|---|---|---|---|
| Asphalt architectural shingle | $4.50 to $8 | $450 to $800 | 15 to 30 years |
| Slate metal roof (steel or aluminum) | $12 to $22 | $1,200 to $2,200 | 50+ years |
| Stone-coated steel (DECRA class) | $14 to $30 | $1,400 to $3,000 | 50+ years |
| Synthetic composite slate | $12 to $18 | $1,200 to $1,800 | 40 to 50 years |
| Natural slate | $20 to $40+ | $2,000 to $4,000+ | 75 to 200 years |
Cost varies by roof pitch, number of valleys and penetrations, tear-off versus overlay, and region. Because the panels are light, many crews can install a slate metal roof over one existing layer of shingles where local code allows, which removes tear-off and disposal from the bid. For broader pricing context across materials, see our 2026 roofing material lifespan report.
Slate metal roof vs real slate
Metal slate wins on weight, price, and hail resistance. Real slate wins on lifespan and authenticity up close. Natural slate weighs 8 to 15 pounds per square foot and often needs engineered framing or reinforcement, while metal slate weighs about 1 pound and drops onto standard decking. Metal flexes under hail and foot traffic. Slate is brittle and can crack from a single misstep during a later repair.
| Factor | Slate metal roof | Natural slate |
|---|---|---|
| Weight per sq ft | About 0.5 to 1.5 lb | 8 to 15 lb |
| Installed cost per sq ft | $12 to $30 | $20 to $40+ |
| Lifespan | 50+ years | 75 to 200 years |
| Hail rating | Class 4 (UL 2218) | Brittle, cracks |
| Structural reinforcement | Rarely needed | Often required |
| Warranty | Lifetime limited common | Usually none from a quarry |
Real slate can outlast the building, which is why it stays on historic and landmark homes. For most houses the framing was never designed for that load, and the reinforcement plus material cost pushes real slate out of reach. A slate metal roof gives the same silhouette without the structural bill.
Slate metal roof vs synthetic composite slate
Synthetic composite slate is the closest rival to metal slate for buyers who want the slate look without the weight. Composite tiles from brands like DaVinci, Brava, and Inspire are molded polymer, weighing about 275 to 311 pounds per roofing square, or 2.75 to 3.1 pounds per square foot. That is heavier than metal slate but far lighter than stone. Composite reads more convincingly as slate from close range because it copies the thickness and irregular edge.
Metal slate holds an edge on weight, fire behavior, and hail flex. Composite holds an edge on close-up realism and a softer, quieter surface. Both carry Class 4 impact ratings and 40 to 50 year expectations, and both cost in a similar $12 to $18 per square foot installed band. Buyers deciding on the composite route can compare options in our guide to composite synthetic roofing versus real slate.
Weight, hail rating, and going over an existing roof
The light weight of a slate metal roof drives most of its practical advantages. At roughly 1 pound per square foot it adds little load, so it rarely triggers structural upgrades and can often be installed as an overlay. The metal also earns the top impact classification, which can lower insurance premiums in hail-prone states.
- Confirm the load path. Even at 1 pound per square foot, verify the deck and framing are sound before an overlay. Rotted decking must be replaced first.
- Check the hail rating. Most metal slate carries Class 4 under UL 2218, the highest impact grade, which resists hail and debris that crack real slate.
- Verify overlay is allowed. Many codes permit two total roofing layers. Going over one existing shingle layer removes tear-off cost, but a third layer is usually prohibited.
- Ask about the wind rating. Interlocking metal slate panels commonly rate to 110 to 120 mph, which matters in storm regions.
Metal slate also holds a Class A fire rating when installed over the specified underlayment, the same top grade slate and clay carry. For homeowners weighing other metal profiles, our comparison of metal roofs that look like shingles covers the shake and shingle stamps alongside slate.
Pros and cons of a slate metal roof
A slate metal roof fits homeowners who want the slate look, a 50 year roof, and a light load, and who accept that it will not fool an inspector at arm’s length the way real slate or thick composite can. Weigh the trade-offs before committing.
- Pro: Light weight, roughly 1 pound per square foot, so no reinforcement and possible overlay.
- Pro: Class 4 hail and Class A fire ratings, often with a lifetime limited warranty.
- Pro: Costs 30 to 60 percent less than natural slate installed.
- Con: Higher upfront cost than asphalt, roughly 2 to 3 times.
- Con: Less convincing than real or composite slate at close range.
- Con: Denting is possible on thinner steel gauges under severe hail, though it stays functional.
Stone-coated steel narrows the realism gap with its granular surface but costs more and can shed granules over decades. Aluminum versions never rust, a real advantage near the coast. Compare the granular route directly in our breakdown of DECRA stone-coated metal roofing.
Is a slate metal roof worth it?
A slate metal roof is often worth it for homeowners who want the slate silhouette, a roof that can last 50 years or more, and hail and fire ratings that may lower insurance, without the structural cost of quarried stone. It makes the most sense on homes whose framing cannot carry real slate, in hail regions, and where a long ownership horizon justifies paying 2 to 3 times asphalt pricing. It makes less sense if budget is the deciding factor or if you plan to sell within a few years.
Frequently asked questions
Is there a metal roof that looks like slate?
Yes. Metal slate roofing is pressed aluminum or steel, or stone-coated steel, stamped from real slate molds and finished in multi-tone slate colors. From the ground a quality metal slate roof is difficult to distinguish from natural slate. Named products include EDCO ArrowLine Slate, Classic Oxford Slate, Matterhorn Slate, and stone-coated DECRA panels, all shaped to copy the slate profile at a fraction of the weight.
How much does a metal slate roof cost?
A metal slate roof costs about $12 to $22 per square foot installed, or $1,200 to $2,200 per roofing square, which is roughly 2 to 3 times an asphalt roof. Stone-coated brands can reach $17 to $30 per square foot on complex roofs. Material alone runs $3.50 to $9 per square foot. Final pricing depends on pitch, valleys, tear-off versus overlay, and region.
How long does a metal slate roof last?
A metal slate roof typically lasts 50 years or more, and most brands carry a lifetime limited warranty plus a separate 30 year finish or fade warranty. That is shorter than natural slate, which can last 75 to 200 years, but far longer than asphalt shingles at 15 to 30 years. The metal will not crack, delaminate, or absorb water over that span.
Is metal slate better than real slate?
Metal slate is better on weight, price, and hail resistance, while real slate is better on lifespan and close-up authenticity. Metal weighs about 1 pound per square foot versus 8 to 15 for stone, rarely needs structural reinforcement, and resists hail that cracks slate. Real slate can last a century or more but costs more and often requires engineered framing.
Can you put a metal slate roof over existing shingles?
Often yes. Because metal slate weighs about 1 pound per square foot, many codes allow it as an overlay on top of one existing shingle layer, which removes tear-off and disposal cost. The deck must be sound and rot-free first, and most jurisdictions cap a roof at two total layers, so a third layer is not permitted. Confirm local code before bidding an overlay.
Metal slate or synthetic composite slate, which is better?
Metal slate is lighter and stronger against fire and hail flex, while synthetic composite slate looks more convincing up close and runs quieter. Composite weighs about 2.75 to 3.1 pounds per square foot versus 1 pound for metal. Both carry Class 4 impact ratings, last 40 to 50 years or more, and cost a similar $12 to $18 per square foot installed. The choice comes down to realism versus weight.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.