What is a FORTIFIED Roof, and why do states keep paying for it?

Who created it, and why

IBHS is an independent, nonprofit research organization funded by the insurance industry. It exists to figure out, empirically, which building practices actually reduce storm damage — and FORTIFIED is the output of that research applied to roofs. It's not a government standard, but state insurance departments have adopted it as the bar for their grant programs because it comes with real engineering behind it, not a marketing claim.

The three tiers

• FORTIFIED Roof — the base tier. Focuses entirely on the roof: sealed roof deck, reinforced roof edges, and impact-rated or wind-rated shingles/materials, along with stronger attachment (typically ring-shank nails instead of standard nails). This is the tier most state grants target.
• FORTIFIED Silver — everything in Roof, plus protection for the rest of the building envelope: reinforced gable ends, bracing for attached structures like porches and carports.
• FORTIFIED Gold — everything in Silver, plus a continuous load path — engineered connections from roof to foundation so the whole structure resists uplift as one unit, not just the roof.

Most grant programs on this site fund the base Roof tier only; a few (South Carolina, Mississippi's later phases) can extend toward Silver-level items like opening protection if funding allows.

What it actually changes, physically

The failure point in most wind and hail damage isn't the shingles themselves — it's the roof deck losing its seal, letting wind get underneath and peel the roof off, or letting water in once the surface is breached. FORTIFIED's core requirements target exactly that: a fully sealed roof deck (taped seams or self-adhering membrane) so that even if shingles are damaged, water can't get in; reinforced edges and stronger fastening so the deck itself doesn't lift.

Why it comes with insurance discounts

IBHS has published research showing FORTIFIED homes suffer measurably less damage and generate fewer claims in real storms — the Alabama Department of Insurance's study after Hurricane Sally is one of the more commonly cited examples. That's the actuarial basis several states now cite when mandating insurance discounts for FORTIFIED-certified homes (Oklahoma, Kentucky, Louisiana all require it by law once certified).

How certification actually happens

• A certified FORTIFIED Evaluator inspects the home before work begins and again after, verifying the work meets spec — this fee is separate from the grant and paid by the homeowner in every program on this site.
• The evaluator submits documentation to IBHS, which issues the official designation.
• Designations typically need renewal (often every 5 years) since the standard is about verified construction, not a one-time claim.

Where this shows up on this site

Nine of the twelve programs tracked here are built directly around FORTIFIED Roof: Alabama, Oklahoma, Florida, Louisiana, North Carolina, Kentucky, Mississippi, South Carolina, and Arkansas. Texas's proposed grant is modeled on the same standard. New Mexico and California instead target wildfire-specific standards (Wildfire Prepared Home, and California's own fire-safe roofing requirements) — see Zone Zero for the wildfire-side equivalent.

Sources

• Insurance Institute for Business & Home Safety (IBHS) — fortifiedhome.org, the standard's publisher and certifying body.
• Alabama Department of Insurance / University of Alabama Center for Insurance Information and Research — post-Hurricane Sally damage study cited across multiple state programs.

Last reviewed: August 28, 2026