Slate Roofing

A slate roof can be a beautiful addition to your home. Not only is it attractive, but it is also very durable and will last for many years. Additionally, slate is fire-resistant, making it a safe choice for your home and it’s a natural product, making it environmentally friendly too. If you are considering a slate roof for your home, Brazen Roofing will be able to help you select the right type of slate and install it properly for the best results. 

Homeowners can choose between natural slate, quarried from stone and prized for its unmatched longevity (often 75-100+ years, and sometimes well beyond a century with proper care), and synthetic slate, a lighter-weight composite that mimics the look of real slate at a lower cost and weight. Both options come in a range of colors and textures, letting you match the roof to your home’s architectural style.

Because natural slate is heavy, often 800 to 1,500+ pounds per roofing square, not every home’s roof structure can support it without reinforcement. Brazen Roofing evaluates your roof’s framing before installation and recommends the right slate type (or a synthetic alternative) so your new roof is both beautiful and structurally sound for the long term.

Slate is an especially popular choice in our historic markets like Charleston and Savannah, where many homes call for a traditional, authentic look that complements the surrounding architecture. Whether you’re restoring a historic home or simply want the timeless curb appeal slate provides, our team has the experience to install it correctly the first time.

Compare this material to our other Roofing Types, or explore our full Residential Roofing service line.

Natural or Synthetic: The Decision That Sets Everything Else

These are two genuinely different products that happen to look alike from the street, and choosing between them decides your budget, your framing and your roof’s lifespan all at once.

• Natural slate. Quarried stone. 75 to 100+ years, sometimes well beyond a century with proper care. Color comes from the stone itself so it never fades. It is the most expensive roof we install and the heaviest.
• Synthetic slate. A composite engineered to mimic slate at a fraction of the weight and cost. Typically warranted in the range of 40 to 50 years rather than a century. Crucially, it usually installs on standard framing without reinforcement, which is what makes a slate look achievable on a house that was never built for stone.

One more consideration people rarely think about: with natural slate, individual tiles can be replaced a hundred years from now because stone is stone. With a synthetic product, a matching replacement depends on that manufacturer and that product line still existing. On a very long horizon that is a real difference, and it is a point in natural slate’s favor that does not appear on any spec sheet.

Weight, and Why We Check the Framing First

Natural slate runs roughly 800 to 1,500+ pounds per roofing square. Across a typical house that difference against asphalt is measured in tons, not pounds. So the sequence on a slate project is not negotiable: we evaluate the framing before we price the roof.

If the home was built for slate, and many older homes in Charleston and Savannah were, you are likely fine, though a century-old structure still deserves a look. If it was framed for asphalt, converting to natural slate usually needs structural reinforcement, and that requires someone qualified to assess it rather than a roofer’s opinion. We will tell you plainly when a project needs an engineer before it needs us, and synthetic slate is very often the better answer in that situation.

The Underlayment and the Fasteners Outlive Nothing

Here is the thing about a hundred-year roof: nothing else on it lasts a hundred years.

The slate will. The underlayment beneath it will not, and neither will the nails holding it. This is why historic slate roofs get restored rather than replaced: the tiles come off, are sorted and inspected, new underlayment goes down, and the sound slate goes back on with copper or stainless fasteners and replacements only where needed.

It also explains the most common cause of premature slate failure, which has nothing to do with the slate: the wrong nails. Fasteners that corrode in fifty years on a roof designed to last a hundred means the tiles start sliding off a perfectly good roof. Copper or stainless steel is not an upgrade on a slate roof. It is the specification. Flashings should be copper or stainless for the same reason, galvanized flashing under century-tile is a guaranteed future failure.

Slate in Charleston and Savannah

Slate is an especially popular choice in our historic markets, where many homes call for a traditional, authentic look that complements the surrounding architecture. Two practical notes for those markets specifically:

• Historic district review. In Charleston and Savannah, exterior work on a contributing structure may need approval from the relevant review body, and material, color and profile can all be part of that. Establish what is required before ordering material, not after.
• Salt air. A genuine argument for slate on the coast. Stone does not corrode. What corrodes is everything holding it on, which brings you back to copper and stainless fasteners and flashings.

See our Charleston roofing and Savannah roofing pages, or the full service area.

Living With a Slate Roof

• Nobody walks on it. Slate breaks underfoot, and most broken tiles we find were broken by a satellite installer, a gutter cleaner or an HVAC technician. If something needs doing up there, it needs someone who knows how to load a slate roof.
• Replace slipped or broken tiles promptly. One missing tile is a repair. A season of water reaching aged underlayment through the gap is not.
• Keep valleys and gutters clear. Debris that dams water forces it sideways beneath the course.
• Watch the metal. On a slate roof the flashings, valleys and fasteners age long before the stone. That is where inspection attention belongs.
• Inspect after severe weather. Cracked and slipped slate is very hard to see from the ground. Book a roof inspection, or start at storm restoration after a named storm or hailstorm.

Our roof maintenance program covers scheduled inspection with a dated photo report, which on a roof this long-lived is worth having on file.

What Slate Costs, and Where Estimates Diverge

Natural slate is the most expensive roof we install. Material is a large part of it, but the spread between two quotes on the same house usually comes from elsewhere:

• Whether the framing needs reinforcement, and whether that is in the scope or excluded
• Fastener and flashing metal, copper and stainless versus something cheaper that will fail early
• The underlayment specified, since it is invisible and it is where corners get cut
• Cutting and fitting labor at hips, valleys and rakes, which is slow, skilled work
• Access, staging and the sheer difficulty of getting stone onto a roof safely
• Whether existing slate is being salvaged and relaid, which changes the job entirely

When you compare quotes, compare the fastener line, the flashing metal and the underlayment. Those three decide whether you are buying a hundred-year roof or a fifty-year roof made of hundred-year material. Financing is available, see finance your roof.

Compare this material to our other Roofing Types, tile and metal are the closest alternatives, and designer shingles can approximate the look at a fraction of the weight, or explore our full Residential Roofing service line. Start with a free roof inspection.

Frequently Asked Questions