What builders and re-roof contractors need to verify before the next permit pulls in Jefferson County and across CZ 4A.

What Changed and Why It Matters in Kentucky

The 2025 FORTIFIED Home Standard, effective November 1, 2025, tightened the High Wind & Hail (inland) designation's roof covering provisions for the entire project pipeline. Louisville sits in climate zone 4A on the DOE Building America climate map, and northeastern Kentucky (Boyd, Carter, Greenup, Bath, Rowan, Elliott) crosses into 5A — both inland zones that must meet the same FORTIFIED High Wind designation as the bulk of Kentucky permits.

The practical change: roof covering selection alone no longer carries a FORTIFIED designation. The standard now treats roof covering, roof deck attachment, and roof-to-wall connection as a sequenced system. Builders who pull a 2026 permit expecting the 2022-era "shingle upgrade" shortcut are seeing Silver and Gold denials at the documentation review stage.

The failure pattern HECS sees most often in Kentucky is also the one that costs the most: the shingle meets IBHS impact testing, but the underlayment at the eave and valley wasn't replaced down to the deck during the re-roof. That single omission disqualifies the FORTIFIED Gold designation regardless of how the rest of the roof was installed.

The 2025 Standard and the Underlying Energy Code

The roof covering requirements sit inside the 2025 FORTIFIED Home Roof chapter — Silver requires a tested, labeled roof covering plus sealed deck; Gold adds the roof-to-wall connection verification. Designations are Bronze / Silver / Gold within High Wind & Hail; Hurricane is a separate designation that Kentucky projects almost never need.

Air sealing work on the same project must satisfy 2024 IECC R402.4.1.2, which requires blower door testing per ASTM E779 and a verified rate at or below Table R402.4.1.1. That table is 3.0 ACH50 across climate zones 3-8, which includes all of Kentucky. Multi-family can use sampling per Table R405.4.2(1) — the same protocol path we use on ENERGY STAR MFNC v1.3 (Rev05) National projects.

Ducts outside the conditioned space are sealed to 2024 IECC R403.3.5: verified leakage to outside ≤ 4 CFM25 per 100 ft² of conditioned floor area. NGBS-2023 §704.1 references the same duct-sealed target through ANSI/RESNET/ICC 850. FORTIFIED does not override the energy code — both standards run side-by-side, and the verifier checks both.

Quick Comparison — FORTIFIED High Wind Tiers

What HECS Actually Verifies on a FORTIFIED Job

A FORTIFIED Home Evaluator walks the roof and the envelope with the IBHS technical checklist. For High Wind roofs in Kentucky, HECS documents the shingle or panel rating label, the starter course and valley underlayment (must extend to the deck per the sealed-deck requirement), the deck nailing pattern measured at the eave and ridge, and the strap or clip count at the top plate from inside the attic.

On the energy side of the same project, HECS runs an HVAC testing and balancing sweep, a blower door test to confirm the 3.0 ACH50 ceiling, and a duct leakage test to confirm the 4 CFM25 per 100 ft² target when ducts run through the attic. The blower door number that earns the FORTIFIED label is not the same as the IECC threshold — FORTIFIED has its own air-sealing check that runs tighter on most Louisville homes. Two separate passes, one combined report.

For the IBHS evaluator role specifically, HECS is credentialed and the deliverable is a FORTIFIED compliance letter uploaded to the IBHS registry. For the energy verification — blower door, duct leakage, HVAC Functional Testing Checklist for ENERGY STAR MFNC — HECS issues the RESNET-style rater letter. One field trip, two sets of deliverables, one set of corrections if a number fails.

Working with HECS

HECS delivers FORTIFIED Home evaluations, blower door, and duct leakage testing for residential and small multifamily projects across Kentucky and Indiana. For a scope call: (859) 983-7382 or hecsusa.com/contact/.

Deliverables That Show Up in the HECS Report

The HECS FORTIFIED packet includes the IBHS-required photo set with geo-tagged timestamps, the deck fastening pattern count, the roof-to-wall connection count, the underlayment lap photo at eaves and valleys, and the shingle label photograph showing the IBHS impact rating. The energy side of the same packet includes the blower door result (multi-point or single-point per ASTM E779), the duct leakage to outside number at rough-in and post-construction where both are scheduled, and the HVAC airflow verification at each register when the HVAC testing and balancing scope is on the contract.

HECS has completed 90+ projects in this category and has been NCI Certified since 2024. Reports reference the exact section of the 2025 FORTIFIED Home Standard that each photo supports, so the IBHS reviewer does not have to re-interpret the field data.

Frequently Asked Questions

Does FORTIFIED 2025 require replacing the entire roof deck on a re-roof? No. The sealed-deck requirement applies where the existing deck is exposed. Full-deck tear-off triggers the requirement; partial re-roofing where the underlayment is intact may not. The IBHS evaluator confirms scope at the pre-construction walk.

What happens if the 2024 IECC blower door result is 3.2 ACH50 in Jefferson County? The 2024 IECC binding limit for CZ 4A is 3.0 ACH50 under Table R402.4.1.2, so 3.2 fails the IECC pass — but it still may pass the FORTIFIED High Wind air sealing check, which is a separate, typically tighter, threshold. Remediation is the contractor's call, not the verifier's.

Can a contractor self-certify FORTIFIED on a single re-roof? No. FORTIFIED requires third-party evaluation by an IBHS FORTIFIED Home Evaluator. HECS is credentialed and issues the compliance letter through the IBHS registry; the contractor signs the acknowledgment but does not self-issue the designation.

How to Engage HECS

For FORTIFIED Home High Wind evaluations paired with blower door and duct leakage verification, contact HECS at (859) 983-7382 or [email protected]. HECS serves Louisville KY, Lexington KY, Cincinnati OH, Indianapolis IN, Nashville TN, Evansville IN, and the rest of Kentucky, North Carolina, Alabama, Georgia, West Virginia, Kansas, and Missouri. Scope requests and pre-construction walks are scheduled through hecsusa.com/contact/, with full service descriptions at hecsusa.com/services/. For Kentucky FORTIFIED projects specifically, ask for the combined IBHS evaluator + energy rater scope to keep the field trip, the report, and the registry upload on a single deliverable.