Knowledge Base · Choosing a Roof
Metal Slate Roof vs. Real Slate: Cost, Weight & Lifespan
A metal slate roof gives the slate look at a fraction of natural slate's cost and weight, with better impact resistance and easier installation. Real slate lasts longer (75–100+ years) and is the genuine article, but it is extremely heavy, expensive, and brittle, and often needs structural reinforcement. For most homes, metal slate is the more practical path to the look.
Technically reviewed by Scott Plumptree, Director of Marketing · Updated 2026-07-12
At a glance
- Metal slate: ~0.5 lb/sq ft, a fraction of the cost, Class 4 hail-rated, installs over many roofs
- Real slate: 8–15 lb/sq ft, very expensive, brittle, and often needs structural reinforcement
- Real slate can last 75–100+ years; metal slate lasts 50+ with a lifetime warranty
- For the look without the weight, cost, and fragility, metal slate is the practical winner
Metal slate vs. real slate: the key differences
The two share a look but little else. Natural slate is quarried stone — beautiful, genuine, and exceptionally long-lived, but it weighs 8 to 15 pounds per square foot, costs among the most of any roof, and is brittle. Metal slate is stamped aluminum finished to look like slate: about half a pound per square foot, a fraction of the cost, and flexible enough to earn the top hail rating. Real slate wins on ultimate lifespan and authenticity; metal slate wins on weight, cost, impact resistance, and ease of installation.
Is a slate roof better than a metal roof?
Each is "better" at different things. Real slate offers unmatched authenticity and the longest lifespan of any roof — 75 to 100 years or more — which is why it graces historic and high-end homes. But its downsides are real: the weight usually requires reinforced framing, the cost is very high, the tiles crack under hail or foot traffic, and repairs are difficult and expensive as matching stone becomes scarce. Metal slate trades a bit of ultimate lifespan for dramatically lower weight and cost, far better impact resistance, and a transferable lifetime warranty.
How much cheaper is metal slate than real slate?
Substantially. Natural slate is one of the most expensive roofing materials available, and its weight frequently adds the cost of structural reinforcement on top. Metal slate delivers a convincing version of the same look for a fraction of the installed price, with no reinforcement needed because it is so light. On a large home — where a real slate roof can run into the tens of thousands of dollars more — the savings are dramatic, which is why so many homeowners choose metal to get the slate aesthetic within budget.
Which should you choose?
For most homes, metal slate is the smarter choice: it captures the slate look without the crushing weight, high cost, and fragility, and it resists the hail and impact that shatter real slate. Genuine quarried slate makes sense mainly for historic-authenticity purists whose structure and budget can accommodate it, and who value its century-plus lifespan and the real stone. If your goal is the timeless slate appearance on a normal home and budget, metal slate gets you there — lighter, tougher, and warranty-backed.
Common questions
Is metal roofing cheaper than slate?
Yes — significantly. Metal slate roofing costs a fraction of natural slate and avoids the structural reinforcement heavy slate often requires. It is one of the main reasons homeowners who love the slate look choose metal instead of quarried stone.
What are the downsides of a real slate roof?
The main ones are extreme weight (often requiring reinforced framing), very high cost, and brittleness — slate tiles crack under hail or foot traffic, and repairs are costly and hard to match over time. Its beauty and longevity are real, but so are these practical drawbacks, which metal slate avoids.
Do insurance companies like slate or metal roofs?
Both are premium, long-lived roofs insurers generally view favorably, but they differ on impact: real slate is prone to cracking from hail, while metal slate carries a UL 2218 Class 4 impact rating that can qualify for impact-resistant-roof discounts. Ask your carrier about its Class 4 discount — metal slate is more likely to earn it.
Ready for real answers about your own roof?
A 30–90 minute visit, a fixed written price, and the warranty walked through in plain English — no pressure, no expiring discounts.
