What the IBHS standard changes mean for builders, roofers, and code officials along the Ohio Valley wind corridor.

The Problem: Roof Coverings Fail Before Walls Do

In the Ohio Valley, straight-line winds and tropical remnants routinely expose asphalt shingle assemblies to design loads the original installation never accounted for. IBHS post-event data consistently shows roof coverings detach first in high-wind events — once the deck is exposed, interior loss follows within minutes. Kentucky sits in a zone where 90–110 mph gusts are a design assumption, not a worst case.

Builders and roofers get three things wrong on most projects HECS evaluates:

• They install shingles to manufacturer nail-pattern specs without verifying the deck attachment underneath meets FORTIFIED wind-uplift continuity requirements.
• They seal flashing at penetrations but leave soffit-to-ridge ventilation gaps that defeat the sealed roof deck principle.
• They treat FORTIFIED as a shingle upgrade when the standard actually governs the entire roof system — deck, underlayment, attachment, edge metal, and covering.

The 2026 FORTIFIED Home update tightens the roof covering section in ways that affect product selection, fastener schedules, and the documentation HECS evaluators must verify in the field.

The Standard: FORTIFIED Home 2025 and the 2026 Supplement

The Insurance Institute for Business & Home Safety (IBHS) published the FORTIFIED Home 2025 standard as the active base document, with a 2026 technical supplement addressing roof covering updates. HECS evaluates to FORTIFIED Home 2025 with the 2026 supplement applied where adopted.

Key 2026 changes affecting Kentucky builders:

• Sealed roof deck requirements now explicitly reference ASTM D226 Type II or FORTIFIED-approved synthetic underlayment with documented 4-inch lap and 6-inch seam tape on all horizontal laps.
• Shingle attachment clarified for three-tab and architectural products — 6-nail pattern required on all FORTIFIED designations regardless of manufacturer 4-nail allowance.
• Edge metal drip edge must be fastened at 4-inch on-center with roofing nails; the prior 8-inch allowance is removed in the supplement.
• Roof covering starter course must use manufacturer-matched starter strip with continuous adhesive strip — hand-cut shingle starters are no longer accepted.

For the Kentucky wind zone, the practical effect is more fasteners, more tape, more documentation — and stricter third-party verification at the sheathing, dry-in, and final covering stages.

Working with HECS

HECS provides FORTIFIED Home Evaluator services across Kentucky, Indiana, Ohio, Tennessee, Illinois, and Missouri. Our IBHS-certified evaluator documents each verification checkpoint and submits the Designation package directly to IBHS. For a scope call on a current project: (859) 983-7382 or hecsusa.com/contact/.

The HECS Approach: Three Site Visits, One Designation

HECS structures FORTIFIED Home evaluations around the three mandatory verification points IBHS requires. Each visit produces a discrete deliverable that closes one stage of the designation.

The HECS methodology:

• Pre-construction review — confirms the roof geometry, exposure category, and shingle product meet FORTIFIED eligibility for the site's basic wind speed.
• Sheathing inspection — verifies 8d ring-shank nails at 6-inch on-center, ring-shank spacing at panel edges, and that H-clips or panel-edge clips are present where spans require them.
• Dry-in inspection — documents underlayment laps, seam tape application, and flashing before the covering goes down. This is the visit most projects fail.
• Final covering inspection — confirms nail pattern, edge metal, starter course, and ridge ventilation per the 2026 supplement.

HECS sequences these inspections into the contractor's schedule so rework stays minimal. The evaluator is on-site during scheduled windows, not at the convenience of a calendar driven by roofing crews.

What HECS Verifies: Documentation That Survives an Audit

The FORTIFIED Designation is only as strong as the documentation behind it. HECS produces a verification report at each stage that satisfies IBHS reviewer scrutiny and supports insurance carrier discounts.

The deliverables include:

HECS also coordinates the FORTIFIED Home Certificate package through IBHS once all three stages pass. The certificate is what unlocks carrier discounts — typically 5–35% on wind premium depending on insurer and designation level. In Kentucky, homeowners with FORTIFIED Roof or FORTIFIED Silver designations see meaningful reductions through participating carriers, though each carrier sets its own schedule.

For projects pursuing both FORTIFIED and an energy program, HECS cross-references roof assembly details against the HECS services page to avoid redundant documentation. On multifamily projects where NGBS-2023 or ENERGY STAR Multifamily New Construction v3.2 scopes align with FORTIFIED sealed-deck and fastener requirements, photo logs and verification forms can be shared across submissions when collection timing and documentation formats match.

Common Pitfalls on Kentucky FORTIFIED Projects

Three failure modes HECS sees repeatedly on Kentucky roofs in 2025–2026:

• Re-roof over existing layers — FORTIFIED requires tear-off to deck for any designation. Roofers who overlay lose the designation before it starts.
• Inadequate soffit ventilation continuity — the sealed roof deck requires balanced intake and exhaust. Missing soffit vents push the assembly out of compliance regardless of shingle quality.
• Photo gaps — IBHS reviewers reject submissions without time-stamped photos at each verification stage. Crews that cover tape before HECS arrives force a tear-out.

Each of these can be prevented with a pre-construction meeting that includes the roofer, builder, and HECS evaluator. The meeting is short — under an hour — and eliminates the rework that drives FORTIFIED cost premiums above the actual material difference.

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Frequently Asked Questions

Does the 2026 FORTIFIED supplement apply retroactively to projects already in progress?

No. The 2026 supplement applies to designations submitted under the 2025 standard on or after the supplement effective date. In-progress projects may continue under the 2025 base standard. HECS confirms the applicable version during the pre-construction review.

Can a Kentucky builder use 4-nail shingle patterns if the manufacturer allows them?

No, not under FORTIFIED. The 2026 supplement requires a 6-nail pattern regardless of manufacturer allowance for any FORTIFIED designation. HECS verifies nail count on a sample of installed shingles at the final covering inspection.

What documentation does HECS submit to IBHS for a FORTIFIED Roof designation?

HECS submits the FORTIFIED Compliance Checklist, three photo logs (sheathing, dry-in, final), the Roof Covering Verification Form, and a Designation Request signed by the evaluator and the builder. The complete package is filed through the IBHS FORTIFIED WiseR portal after the final inspection passes.

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How to Engage HECS

HECS handles FORTIFIED Home Evaluations across Kentucky, Indiana, Ohio, Tennessee, Illinois, and Missouri. Relevant services include FORTIFIED Home Evaluation, blower door and duct leakage testing for code compliance, and 45L Tax Credit Certification for energy-efficient new construction. To scope a project, call (859) 983-7382 or email [email protected]. Request service through hecsusa.com/contact/ or review the full service menu at hecsusa.com/services/. HECS also serves Louisville KY, Lexington KY, Cincinnati OH, Indianapolis IN, Nashville TN, and Evansville IN directly, with regional coverage extending to Columbus OH, St. Louis MO, and Chicago IL on scheduled visits. For Kentucky-specific FORTIFIED scope, see the Fortified Roof Evaluation Louisville page.