The Complete Guide to Stone Coated Steel Roofing: Profiles, Brands & Performance

Stone coated steel roofing has been one of the fastest-growing premium roofing categories over the last decade, and for good reason. These products combine the durability of steel with the aesthetic appeal of traditional tile, shake, and shingle profiles — all at a fraction of the weight of genuine clay or concrete tile. At Lifetime Construction Builders, we have installed thousands of stone coated steel roofs across Arkansas and Michigan using DECRA, TILCOR, and Westlake Royal products, and this guide covers everything you need to make an informed decision.

Table of Contents

What Is Stone Coated Steel Roofing?

Stone coated steel roofing is a category of metal roofing panels formed from galvanized or Galvalume steel and coated with an acrylic base layer embedded with natural stone granules. The granules are then sealed with an acrylic overglaze that locks the stones permanently to the panel surface. The result is a product that looks like traditional tile, wood shake, or asphalt shingles from the street, but performs like steel under the weather.

Unlike standing seam metal panels — which have a distinctly industrial or commercial aesthetic — stone coated steel products are engineered specifically for residential applications where curb appeal matters. HOA communities that restrict exposed metal roofing frequently allow stone coated steel because it mimics approved traditional materials. If you’re comparing these two technologies, our post on stone coated steel vs. standing seam metal covers that decision in depth.

The technology has roots in New Zealand and Australia, where DECRA (an acronym for Drexel Engineering Corporation of Raintite of Australia) pioneered the product category in the 1950s. Today DECRA operates under the Boral umbrella, and the market includes major brands like TILCOR and Westlake Royal alongside dozens of regional manufacturers.

How Stone Coated Steel Is Made

Understanding the manufacturing process helps explain why stone coated steel costs more than asphalt and performs better over time. The process involves five key stages:

1. Steel Substrate

Most quality stone coated steel panels start with 26-gauge or 28-gauge steel that has been galvanized (zinc coated) or treated with Galvalume (zinc-aluminum alloy). The Galvalume coating provides superior corrosion resistance compared to standard galvanized steel, especially in coastal or high-humidity environments. The panels are roll-formed into the desired profile shape — the deep embossing that creates the tile, shake, or shingle appearance is done at this stage.

2. Acrylic Base Coat

An acrylic adhesive base coat is applied to the formed panel. This layer must bond to steel while remaining flexible enough to expand and contract with temperature cycling without cracking or delaminating. Premium formulations use UV-stabilized acrylic that resists degradation from years of sun exposure.

3. Stone Granule Application

Natural basalt stone granules are pressed into the wet acrylic base coat under controlled pressure. The granules are pre-colored using mineral-based pigments that resist UV fading far better than organic dyes. Granule size, depth of embedment, and coverage density all affect the final visual appearance and how well the coating weathers over decades.

4. Acrylic Overglaze

A clear acrylic overglaze is applied over the granules, locking them to the substrate and providing an additional weather barrier. This topcoat determines much of the panel’s long-term performance — cheaper products use thinner overglaze formulations that allow granule shedding after 10-15 years.

5. Panel Interlocking System

Most stone coated steel panels use an interlocking tongue-and-groove or concealed fastener system along the panel edges. The concealed fastener systems — like those used in TILCOR CF products — hide all fasteners beneath the overlapping panels, eliminating potential water entry points and creating a cleaner visual appearance. Exposed fastener systems, while easier to install, require periodic checking for fastener seal integrity.

Profile Types: Tile, Shake & Shingle

Stone coated steel is available in three primary profile categories, each designed to replicate a traditional roofing material. Our detailed post on stone coated steel roofing profiles covers the visual and performance differences between these options in full detail — here is a summary of each:

Tile Profiles

Tile profiles replicate the S-curve or barrel shape of Spanish clay tile or the flatter profile of Tuscan-style flat tile. They deliver a Mediterranean, Spanish Colonial, or high-end residential aesthetic at roughly one-fifth the weight of genuine clay tile (approximately 1.4 lbs/sq ft vs. 8-12 lbs/sq ft for clay). This weight difference often eliminates the need for structural reinforcement that clay tile requires.

Products in this category include the DECRA Villa Tile (authentic S-curve profile), DECRA Tile (low-profile flat tile), TILCOR Bond Tile (interlocking tile system), and Westlake Royal Pacific Tile and Barrel Vault Tile. These products are particularly popular in the Sun Belt and for homeowners who want a distinct Mediterranean look without the structural and cost burden of genuine clay.

Shake Profiles

Shake profiles replicate the textured, rustic appearance of hand-split cedar wood shakes — a look that is extremely popular in the Pacific Northwest, mountain regions, and Craftsman-style architecture. Stone coated steel shake panels capture the irregular surface texture and shadow lines of real wood while delivering fireproof performance. Real wood shakes are Class C fire rated; stone coated steel shake is Class A.

Products include the DECRA Shake XD (extra-deep shadow lines for a premium wood appearance), TILCOR CF Shake (concealed fastener system for clean installation), and Westlake Royal Unified Steel Pine-Crest Shake. These are popular for Craftsman bungalows, mountain homes, and any property where the rustic wood aesthetic matters but durability cannot be compromised.

Shingle Profiles

Shingle profiles are the most versatile stone coated steel option because they replicate the familiar appearance of dimensional asphalt shingles — the most common residential roofing material in North America. For homeowners in traditional neighborhoods or HOA communities that require a conventional roofing appearance, stone coated shingle profiles deliver premium durability without an obvious departure from neighborhood norms.

Products include the DECRA Shingle XD (architectural shingle profile with deep shadow lines), TILCOR CF Shingle Concealed Fastener (clean installation with no exposed fasteners), Westlake Royal Granite-Ridge Shingle, and Westlake Royal Cottage Shingle (smaller scale for traditional colonial homes). When homeowners ask whether stone coated steel is better than asphalt shingles, the shingle profile comparison is usually where we start.

Brand Comparison: DECRA, TILCOR & Westlake Royal

At Lifetime Construction Builders, we install three primary stone coated steel brands, each of which brings different strengths to different projects. Our full DECRA vs. TILCOR vs. Westlake Royal brand comparison digs deeper into the specifics — this section provides an overview.

DECRA

DECRA is the original stone coated steel manufacturer, with over 70 years in the market. Their panels are manufactured in California and carry some of the most recognized brand recognition in the premium roofing market. DECRA’s Villa Tile, Shake XD, Shingle XD, and Tile lines cover the full profile range. DECRA products carry a limited lifetime transferable warranty and are known for aggressive granule adhesion formulations that resist shedding through decades of thermal cycling.

DECRA panels are approved for installation over existing roofing (re-roof applications) in most jurisdictions, which reduces tear-off cost and landfill waste. This makes DECRA a popular choice for homeowners looking to minimize disruption and installation cost while still upgrading to a premium system.

TILCOR

TILCOR is a New Zealand-based manufacturer with a strong North American presence, known particularly for their concealed fastener (CF) product line. The TILCOR CF Shingle, CF Shake, and Bond Tile systems use a locking panel design that routes all water away from fastener points. This concealed fastener architecture produces a cleaner visual result with fewer potential leak points over the roof’s lifespan.

TILCOR products are manufactured to Australian/New Zealand standards that historically required higher wind uplift performance than minimum US code — a meaningful advantage in Arkansas and Michigan where severe weather is a regular concern. Our post on stone coated steel for hurricane and hail zones discusses TILCOR’s wind ratings in more detail.

Westlake Royal

Westlake Royal (operating as Unified Steel) produces several stone coated steel lines including the Pine-Crest Shake, Granite-Ridge Shingle, Pacific Tile, Barrel Vault Tile, and Cottage Shingle. Westlake Royal has a strong distribution network in the Midwest and South, making them a cost-accessible option with competitive warranty terms.

The Pine-Crest Shake in particular has found popularity in Michigan where the wood shake aesthetic has traditional roots and homeowners want to replicate the look without the fire risk and maintenance burden of real wood. The Barrel Vault Tile is a strong choice for more dramatic Mediterranean or Spanish Colonial applications in both markets.

Performance Specifications: Wind, Fire & Hail

Stone coated steel consistently earns the highest available ratings across all three major performance categories. For Arkansas homeowners in tornado country and Michigan homeowners dealing with lake-effect storms and ice, these ratings translate directly to real-world protection — and in many cases, meaningful insurance premium reductions.

Our dedicated post on stone coated steel wind and impact ratings explains each rating system and what it means for your home — here is a summary:

Wind Uplift

Stone coated steel panels — particularly interlocking systems — achieve wind uplift ratings between 120 and 170 mph depending on the product and installation method. Standard three-tab asphalt shingles are typically rated to 60-70 mph; dimensional asphalt shingles to 110-130 mph. The panel-to-panel mechanical interlocking in stone coated steel systems creates a continuous diaphragm effect that dramatically reduces uplift force per fastener point compared to individual shingles.

Arkansas sits in the heart of Tornado Alley, and Bryant (our headquarters) has seen multiple significant tornado events in the past decade. Michigan’s southwestern counties face severe Great Lakes storm systems each year. In both markets, the difference between 130-mph and 160-mph wind rating is not academic — it is the difference between a roof that survives a near-miss and one that requires replacement.

Impact Resistance

The UL 2218 Class 4 impact rating is the highest available rating under the industry’s standard hail simulation test. A Class 4 product must withstand a 2-inch steel ball dropped from 20 feet without cracking, fracturing, or exposing the underlying substrate. All of the primary stone coated steel products we install — DECRA, TILCOR, and Westlake Royal lines — achieve Class 4 rating.

For context: standard asphalt shingles typically rate Class 1-2. Atlas Pinnacle Pristine — one of the premium asphalt products our team also installs — achieves Class 3. Class 4 stone coated steel provides one full tier above even the best asphalt impact-resistant products.

Fire Resistance

All stone coated steel products earn a Class A fire rating — the highest available classification under ASTM E108. Steel does not ignite, and the stone granule surface provides no fuel for flame spread. This is a significant advantage over wood shake roofing (Class C) and comparable to premium asphalt (Class A with fire-resistant underlayment).

In wildfire-adjacent areas of Arkansas and the rural wooded communities of Michigan, Class A fire rating provides meaningful protection against airborne embers that can ignite a roof surface even when the fire source is blocks away.

Cost & ROI

Stone coated steel is a premium roofing investment. Our detailed answer to how much does a stone coated steel roof cost breaks down the numbers fully — here is the overview:

Expect to pay $10-18 per square foot installed for a stone coated steel roof, or roughly $20,000-$36,000 for a typical 2,000 sq ft home. Tile profiles sit at the high end; shingle profiles at the low end. Complexity factors — roof pitch, valleys, dormers, existing tear-off — add to the base material and labor cost.

Compare this to quality dimensional asphalt shingles at $4-7/sq ft installed ($8,000-$14,000 for the same home). The upfront premium for stone coated steel is significant. The ROI case rests on three factors:

  1. Lifespan: A stone coated steel roof installed today should outlast 2-3 asphalt replacement cycles. Over a 50-year horizon, the total cost of ownership often favors stone coated steel when you account for tear-off costs on each asphalt replacement.
  2. Insurance discounts: Many insurance carriers offer 10-30% premium discounts for Class 4 impact-resistant roofing. In Arkansas and Michigan — both active hail states — these discounts can recoup thousands of dollars over the roof’s life.
  3. Home value: Premium roofing material adds to appraisal value. A transferable lifetime warranty is a meaningful selling point for homebuyers comparing properties.

Installation Process

Stone coated steel installation differs significantly from asphalt shingle work, which is why not every roofing contractor should be handling these products. Our full stone coated steel installation guide walks through what to expect during a project — here is the core process:

Tear-Off vs. Re-Roof

Many stone coated steel products are approved for installation over one existing layer of asphalt shingles in jurisdictions that permit re-roofing. This saves tear-off labor and disposal costs. When a complete tear-off is required (two existing layers, structural damage, or inadequate substrate), the process begins with full decking inspection and any necessary sheathing replacement.

Underlayment

A high-performance synthetic underlayment is installed over the decking before panels go down. Unlike asphalt felt, synthetic underlayments resist tearing, wrinkling, and moisture absorption during installation. Some manufacturers specify their own proprietary underlayment product to maintain warranty compliance.

Battens (Product-Specific)

Tile and some shake profiles require horizontal wood or composite battens installed over the underlayment. Panels attach to the battens rather than directly to the decking, creating an air gap that improves ventilation and drainage. The batten spacing is precisely specified by the manufacturer — incorrect spacing voids the warranty and affects panel alignment.

Panel Layout & Installation

Panels are installed from eave to ridge, with each row overlapping the previous to direct water down-slope. For concealed fastener systems (TILCOR CF), each panel is secured through a hidden flange that is covered by the overlapping panel above — this is the key differentiator that makes these systems particularly water-tight. Fastener type, count, and placement are all manufacturer-specified and affect the warranty.

Flashing, Valley & Ridge Details

Transition details — valleys, chimneys, skylights, pipe penetrations, wall intersections — are handled with purpose-made metal flashing. Ridge caps are manufacturer-supplied matching profiles, not site-fabricated pieces. The quality of these detail areas determines whether the roof will be watertight through decades of freeze-thaw cycling, heavy rain, and ice dam conditions common in both Arkansas and Michigan winters.

Lifespan & Warranty

Our dedicated answer to how long does a stone coated metal roof last covers this topic in full. The short version: properly installed stone coated steel roofs routinely last 40-70 years. Most manufacturers offer a limited lifetime transferable warranty on the product itself, with contractor workmanship warranties typically covering 5-15 years depending on the installer.

For comparison, quality dimensional asphalt shingles typically carry a 30-year product warranty but deliver a realistic lifespan of 20-25 years in Arkansas and Michigan climates where UV exposure, summer heat cycling, and winter ice and wind accelerate degradation. A standing seam metal roof carries a comparable lifespan to stone coated steel (40-60 years) with a different aesthetic and cost profile — see our standing seam comparison for details.

Key lifespan factors include:

  • Coating quality: Premium acrylic overglaze formulations last longer than budget products
  • Fastener system: Concealed fasteners eliminate a major long-term failure point
  • Ventilation: Proper attic ventilation prevents moisture buildup that accelerates substrate degradation
  • Installation quality: Manufacturer-certified installers follow specifications that protect the warranty
  • Climate: More extreme freeze-thaw cycling shortens lifespan — still far exceeding asphalt in both our markets

Pros & Cons of Stone Coated Steel Roofing

No roofing material is perfect for every situation. Our answer post on the disadvantages of stone coated metal roofing covers the negatives honestly — here is a balanced summary:

Advantages

  • Exceptional longevity: 40-70 year lifespan vs. 20-25 for asphalt
  • Class A fire, Class 4 impact, 120-170 mph wind ratings: Top ratings across all categories
  • Aesthetic versatility: Tile, shake, and shingle profiles for virtually any home style
  • Lightweight: 1.4-2.0 lbs/sq ft vs. 8-12 lbs for clay tile — no structural reinforcement needed
  • Insurance discounts: Class 4 rating earns premium reductions in active hail states
  • Low maintenance: No periodic resealing, staining, or repair cycles like wood shake
  • Re-roof eligible: Many products can be installed over existing asphalt (one layer)
  • Transferable warranty: Adds resale value at the time of home sale

Disadvantages

  • Higher upfront cost: 2-3x the cost of quality dimensional asphalt shingles
  • Fewer qualified installers: Not every roofing contractor has manufacturer training — verify credentials
  • Granule shedding: Budget products or aging coatings lose granules over time, reducing aesthetics
  • Noise: Some homeowners notice increased rain or hail noise vs. a heavily-insulated asphalt roof (though batten-installed tile profiles dampen this significantly)
  • Repair complexity: Individual panel replacement requires matching product availability — discontinued product lines can complicate future repairs

Is Stone Coated Steel Right for Your Home?

Stone coated steel is the right choice when two or more of the following are true for your situation:

  • You plan to stay in the home 10+ years and want to avoid another roofing project
  • You are in an active hail or severe wind zone (virtually all of Arkansas and Michigan qualify)
  • You want premium aesthetics — tile, shake, or architectural shingle — without the weight or fire risk of traditional materials
  • Your HOA restricts exposed metal roofing but allows traditional-profile materials
  • You are replacing a clay or concrete tile roof and want to eliminate the structural load concern
  • Insurance premium savings from Class 4 rating make the economics work in your market

Asphalt shingles remain the right answer when upfront budget is the primary constraint and you are comfortable with a 20-25 year replacement cycle. Our page on stone coated steel vs. asphalt shingles walks through the side-by-side comparison in detail.

If you are considering a re-roof or new construction project in Arkansas or Michigan, the team at Lifetime Construction Builders’ stone coated steel roofing service offers free inspections and product consultations. As an authorized installer for DECRA, TILCOR, and Westlake Royal products, we can show you physical samples of every profile in both states. Call us at (501) 307-1440 or use our online contact form to schedule your consultation.

You can also explore our metal roofing services page for a broader look at all metal roofing options we install, including standing seam, corrugated, and R-panel systems.

About the Author

Daniel Retana is the owner of Lifetime Construction Builders LLC, founded in 2009 and licensed in Arkansas (#RR0540591024) and Michigan (#252400088). Daniel is an Atlas Preferred Contractor and authorized installer for Atlas Pinnacle Pristine products. The company carries $1 million in liability insurance and $2 million in workers’ compensation coverage. Over 15 years, Lifetime Construction Builders has installed DECRA, TILCOR, and Westlake Royal stone coated steel systems on hundreds of homes across both markets. Contact the company at lifetime-built.com or (501) 307-1440.