Exploring the different residential metal roofing options

By Mitch Heitsch, Westlake Royal Building Products.

Residential metal roofing is often discussed in terms of standing seam and stone-coated steel, what's the difference?

Metal roofing has seen substantial growth in residential markets, from low single digits to the mid-teens over the past two decades, as homeowners increasingly associate metal with strength, fire resistance and dependable performance during severe weather. In general, residential metal roofing comes in two options — standing seam (panels) and stone-coated steel (shingles).

Standing seam roofs feature feature continuous vertical panels with raised seams and few exposed fasteners, giving them a sleek architectural appearance. This clean look paired with the aforementioned durability of metal has made them a popular choice for homeowners who like a modern aesthetic. 

As for stone-coated steel systems, such as Westlake Royal Roofing Products' Unified Steel, they come in a variety of profiles that replicate everything from shake to tile and shingles. This offers homeowners a wide variety of aesthetics while maintainnig the core benefits of metal, including impact resistance, fire performance and high wind ratings.

Comparing the two options

Installation

Standing seam panels may be manufactured by a controlled producer, but there is a growing trend of contractors forming panels onsite with portable roll formers, an approach that can reduce cost but may introduce variability in panel dimensions, finish or warranty eligibility. Alternatively, stone-coated steel is factory-manufactured under controlled conditions, with established quality checks that help support long-term reliability and consistent fit across the entire roof system.

Price

Standing seam is generally the higher-priced metal option due to specialized installation, continuous-panel fabrication and precise fastening methods. Stone-coated steel is typically more cost-effective while still delivering premium performance and strong protection from wind, fire and hail.

Longevity

Both systems are capable of lasting several decades with proper installation. Each style, material and brand may have different levels of durability. For example, stone-coated steel systems, such as Unified Steel, are engineered for severe weather conditions including hail impact, wind-driven rain, heavy snow and fire. Unified Steel also provides a fully transferable 50-year limited warranty, enhancing long-term value.

In short, there are advantages to each system

Standing seam metal benefits: 

• Sleek, modern, architectural appearance
• Minimal exposed fasteners
• Excellent long-term durability
• Strong fit for contemporary or modern home designs 

Stone-coated steel advantages:

• Replicates the look of shake, shingle or tile
• Lightweight for most reroof applications
• Strong resistance to wind, hail and fire
• Textured surface may help reduce rapid snow-shed in some climates