Metal Roof Warranty Guide — What's Actually Covered

Metal roof warranties are the most misunderstood document in residential roofing. A typical homeowner sees "50-year warranty" on a brochure and assumes the entire roof is covered for 50 years. In reality there are four separate warranties on every metal roof, each covering a different failure mode, each with its own duration, exclusions, and transferability. If you don't know which one applies to a given problem, the manufacturer and the installer will both point at each other and your claim goes nowhere. This page is the contractor's-eye view of how those four layers actually function — and where they fail.

Layer 1 — Substrate Warranty (the metal itself)

What it covers: Perforation of the steel or aluminum base material from corrosion working through from the back side. Specifically: rust-through that creates a hole in the panel.

Duration: 25 years on standard Galvalume steel, 35 years on heavyweight Galvalume Plus, 40 years on aluminum (typically lifetime on aluminum from premium manufacturers), 50+ years on copper.

What it doesn't cover: Surface rust, edge rust where panels were field-cut and the cut edge wasn't primed, galvanic corrosion from mixing dissimilar metals (e.g. copper flashings on galvanized panels), and any corrosion within ~1,500 feet of saltwater unless aluminum substrate was specified. The salt-air exclusion catches Bolivar Peninsula and Galveston West End installs constantly — it's why we refuse to quote steel substrate near the coast.

Layer 2 — Paint / Coating Warranty (the finish)

What it covers: Color fade beyond a defined ΔE value (typically 5–7 Hunter units), chalking beyond a defined ASTM rating, film adhesion failure (peeling), and cracking.

Duration: Kynar 500 / Hylar 5000 (PVDF fluoropolymer) — 30 years no fade, 35–40 years prorated. Standard SMP (silicone modified polyester) — 20–25 years prorated, with much weaker fade specs. The Kynar upgrade is the single best dollar you'll spend on a Houston metal roof — our UV load destroys SMP coatings in 12–18 years on south- and west-facing slopes.

The prorated trap: Most paint warranties are prorated against original cost. A "40-year warranty" that pays out at 30% of original panel cost in year 25 isn't going to fund a re-roof. Read the proration schedule before signing.

Layer 3 — Weathertight (System) Warranty

This is the warranty that actually matters and the one most homeowners don't get because their installer wasn't certified.

What it covers: Water intrusion through the installed roof system, including the panels, the seams, the flashings, the penetration boots, and the trim. If a leak develops anywhere in the assembly the manufacturer comes out and pays for the repair (and in some programs, the resulting interior damage).

Duration: 10, 15, or 20 years depending on manufacturer program tier. Englert, Petersen PAC-CLAD, Drexel Metals, and ATAS all offer system warranties at varying tiers.

The catch: Issued only on installs performed by manufacturer-certified contractors following published assembly specs, with all certified components (panels, clips, flashings, fasteners, sealants from the same manufacturer's approved list). A roofer who installs the panels but uses generic flashings and an off-brand butyl sealant has voided your weathertight warranty before he leaves the driveway. RISE Roofing is certified with Englert, Drexel Metals, Petersen, and DECRA — we file the weathertight warranty paperwork as part of every certified install.

Layer 4 — Workmanship (Contractor) Warranty

What it covers: Anything that fails because of how the roof was installed — flashing details, fastener pattern, penetration boots, valley assemblies, trim transitions. The substrate, paint, and panels are someone else's warranty; the install is the contractor's.

RISE Roofing's coverage: 10-year workmanship warranty on every metal install we do — transferable once at sale, no proration, no gotchas. If our crew installed it wrong, we fix it. We sit at the top of the 1–10-year range typical in the trade because our metal install crews are direct employees, not subcontractors, and we control the install discipline end-to-end.

What Voids Each Warranty (the actual list)

• Substrate: Coastal exposure without aluminum spec, galvanic contact with copper or lead, abrasive cleaning, embedded metal debris (rebar tie-wire, steel wool from gutter installers).
• Paint: Pressure washing above ~1,200 PSI, harsh solvents, contact with petroleum-based roof cement, debris ponding (tree leaves left on the roof for months).
• Weathertight: Any modification by a non-certified contractor — including HVAC techs cutting curbs, solar installers drilling mount points, satellite dish installers. Always route any post-install penetration through us.
• Workmanship: Owner-performed modifications, storm damage (covered under homeowners insurance, not warranty), tree impact, intentional damage.

Warranty Transfer at Sale

Most substrate and paint warranties are non-transferable; the original owner is the only beneficiary. Weathertight and workmanship warranties from RISE Roofing transfer once at sale with a written transfer request — a meaningful resale advantage if you sell within the warranty period. We process transfers free of charge.

Want a copy of the specific warranty package we file on your project? Call (832) 345-9527 — we'll walk you through every layer line by line before you sign the contract.