Fire Rating
Fire Rating | Metal Roofing | Roofing | Charleston
Charleston’s coastal climate demands a roof that can stand up to salt-laden air, summer heat, and the occasional wayward ember. HEP’s fire-rated metal roofing delivers unrivaled peace of mind, boasting a Class A fire rating that resists ignition even under flying sparks and radiant heat. Available in an array of colors and profiles that complement historic downtown cottages and modern waterfront homes alike, our panels lock tightly to repel hurricane-driven rain while their reflective finishes help keep interiors cooler and energy bills lower.
Backed by HEP’s decades of local expertise, every installation pairs premium materials with precision craftsmanship and generous warranties. From the first on-site consultation to the final inspection, our Charleston team guides you through product choices, permitting, and maintenance tips so your investment stays beautiful and protective for decades. Discover how lightweight durability, curb-appeal, and top-tier fire resistance come together—schedule your free assessment today and experience the lasting advantages of metal roofing with HEP.
FAQs
What makes metal roofing one of the highest fire-rated roofing materials?
Steel, aluminum, and copper panels are non-combustible—they do not ignite, burn, or contribute fuel to a fire. When tested under ASTM E108/UL 790, most standing-seam and through-fastened metal systems earn a Class A rating, the highest available. Unlike asphalt shingles or wood shakes, metal will not curl, melt, or shed embers. In the event of a lightning strike, the roof safely dissipates the electrical energy without catching fire. These inherent properties are why code officials and insurers consistently rank metal among the safest roofing options.
What specific fire ratings do metal roofs carry, and which codes apply in Charleston, SC?
Metal panels installed over a non-combustible deck or approved underlayment are typically listed as Class A under UL 790/ASTM E108. Charleston follows the South Carolina Building Code, which references the International Building Code (IBC) and International Residential Code (IRC). Both codes recognize Class A, B, and C assemblies; Class A is required for most commercial and multifamily structures and is recommended for single-family homes in wildfire-exposed areas. Always ask your contractor for documentation showing the roof assembly’s UL listing to ensure it meets local code and insurance requirements.
How does a metal roof's fire resistance compare to traditional asphalt shingles?
Asphalt shingles rely on fiberglass or organic mats impregnated with petroleum-based asphalt, which can ignite under extreme heat or when embers lodge between tabs. Even Class A asphalt shingles can lose their rating if they age, crack, or are installed over combustible decking. In contrast, metal panels remain non-combustible throughout their lifespan and resist ignition at temperatures well above 1,200 °F. In side-by-side burn tests, metal roofs prevent flame spread and do not generate burning debris, giving occupants more time to evacuate and firefighters a safer structure to defend.
Will installing a fire-rated metal roof lower my homeowner’s insurance premiums in Charleston?
In many cases, yes. Because Class A metal roofs significantly reduce the risk of flame spread and roof ignition, insurers often categorize them as “superior” or “preferred” roofing materials. Policy discounts in South Carolina commonly range from 5 % to 15 %, depending on the carrier and the home’s overall risk profile. To qualify, you may need a certificate or UL assembly number verifying the Class A rating. Check with your insurance agent before installation so you can submit the required documentation immediately after the roof is completed.
Are special underlayments or assemblies required to achieve a Class A rating on a metal roof?
Most steel and aluminum panels achieve Class A when installed over a solid, non-combustible deck such as 5⁄8-inch Type X gypsum, or over a standard plywood deck with a self-adhered, ASTM E108-rated fire barrier underlayment. In high-slope residential applications, a synthetic or high-temperature ice-and-water shield that carries its own Class A classification is typically specified. Your Charleston roofing contractor should follow the exact assembly listed in the UL directory—including clip spacing, fastener type, and ventilation details—to preserve the rating and pass final inspection.
What maintenance practices help preserve the fire resistance of my metal roof in Charleston’s coastal climate?
Metal panels themselves do not lose fire resistance, but debris buildup can create combustible nests. Keep valleys, gutters, and panel seams free of pine straw, oak leaves, and bird nests at least twice a year—more often after hurricanes or fall leaf-drop. Inspect and clean vent openings and ridge caps so embers cannot enter the attic. Check for scratched or rusted areas; apply manufacturer-approved touch-up paint to prevent corrosion from salt-laden air. Finally, trim overhanging branches so limbs can’t scrape the panels or drop flammable material onto the roof surface during dry, windy periods.