Technical guidance for builders and code officials on IBHS FORTIFIED Roof requirements across Kentucky, Indiana, and Ohio.
The Insurance Institute for Business & Home Safety (IBHS) revised the FORTIFIED Home Standard in 2025, and the changes ripple directly into how Kentucky builders specify roof coverings on new construction and reroofs. Insurance carriers underwriting properties in Kentucky, Indiana, Ohio, Tennessee, Illinois, and Missouri increasingly require third-party verification of FORTIFIED Roof or FORTIFIED Silver designations before issuing wind-mitigation credits. HECS serves as an IBHS FORTIFIED Home Evaluator across this region and routinely documents the gap between design intent and field installation.
FORTIFIED is not a building code — it is a beyond-code designation layered on top of the 2024 IRC and 2021 IRC (the editions most jurisdictions in HECS's service area currently enforce). The program requires a designated FORTIFIED Home Evaluator to verify compliance through documentation review and site inspection, then submit the project to IBHS for designation issuance. That third-party verification is the deliverable insurance carriers actually rely on.
The FORTIFIED Roof standard addresses six failure modes the IBHS research identified after Hurricane Katrina and subsequent wind events: roof covering loss, roof deck failure, water intrusion through the deck, roof-to-wall connection failure, wall failure, and continuity from roof to foundation. For the roof covering itself, the standard locks down three categories: shingle attachment, sealed roof deck, and flashing/drip edge transitions.
For asphalt shingle installations on FORTIFIED Roof projects in our region, HECS verifies the shingle starter course is sealed at both the eave and rake, that field shingles meet the manufacturer's high-wind attachment pattern (commonly a six-nail pattern rather than the four-nail code minimum), and that hip and ridge cap shingles are rated and installed per manufacturer high-wind guidance.
| FORTIFIED Roof Component | 2024 IRC Baseline | FORTIFIED Requirement |
|---|---|---|
| Asphalt shingle nailing | 4 nails per shingle (manufacturer std) | 6 nails per shingle in field, high-wind zones |
| Roof deck sealing | Not required | Sealed deck — taped seams and joints |
| Drip edge | Required at eaves and rakes | Required, with overlapping joints per FORTIFIED detail |
| Underlayment | ASTM D225 or D4869 | ASTM D1970 self-adhering at eaves/valleys/rakes |
Need HECS for your project?
NCI-certified testing and certification across KY, IN, OH, TN, IL, MO.
Call (859) 983-7382 Get a QuoteThe sealed roof deck requirement is the single most common failure point HECS documents during FORTIFIED Roof evaluations. The standard requires that all roof deck seams be sealed with a compatible flashing tape or self-adhering membrane, applied in a manner that prevents wind-driven rain from penetrating the deck if the primary roof covering is lost. HECS inspectors routinely find seams left unsealed at penetrations, valleys, and transitions to wall cladding — the kind of detail that passes a municipal framing inspection but fails FORTIFIED.
For underlayment on FORTIFIED Roof projects, the 2025 FORTIFIED Home Standard requires a self-adhering membrane conforming to ASTM D1970 (or equivalent) applied at eaves, valleys, rakes, and around all roof penetrations. Field underlayment on the remaining deck may be a standard synthetic or felt underlayment per the shingle manufacturer's listing. HECS project data shows that the average FORTIFIED submission requires one to two corrective site visits before the sealed deck documentation passes review — typically for missing valley membrane runs or unsealed flashing transitions.
Drip edge must be installed per FORTIFIED detail at both eaves and rakes, with overlapping joints (a minimum of roughly 3 inches at lap joints per common manufacturer guidance, though HECS defers to the specific FORTIFIED detail drawing on each project). Step flashing at sidewalls, kick-out flashing where roof terminates against wall cladding, and chimney saddles all fall under the flashing verification scope. HECS documents each transition with date-stamped photography for the IBHS submission packet.
Working with HECS: HECS handles FORTIFIED Home Evaluation for projects in Kentucky, Indiana, Ohio, Tennessee, Illinois, and Missouri. Our scope begins at the FORTIFIED designation kickoff and ends with the submitted compliance packet to IBHS. For a scope call: (859) 983-7382 or hecsusa.com/contact/.
For asphalt shingles rated for high-wind zones, FORTIFIED requires the manufacturer's high-wind nailing pattern — almost universally a six-nail pattern on laminated architectural shingles in the HECS service region. HECS verifies nailing pattern through site observation during the in-progress roof inspection (before underlayment and shingles fully obscure the deck), and through photographic documentation at strategic locations across the roof field.
Starter strip shingles must be either a manufacturer-produced starter strip or hand-cut shingles with the sealant strip aligned at the eave edge, and they must be sealed at both eave and rake. HECS project data indicates that hand-cut starters with sealant misalignment are a recurring deficiency in projects that have not previously worked under FORTIFIED protocols.
For metal roof coverings, FORTIFIED references the manufacturer's engineering guide for clip spacing, fastener type, and seam sealant requirements. HECS defers to the specific metal manufacturer installation documentation on metal roof projects.
The most frequent deficiencies observed across HECS FORTIFIED Roof projects include missing self-adhering membrane in valleys, unsealed roof deck penetrations (plumbing vents, HVAC line sets, attic vents), starter course sealant strips not aligned at rakes, and drip edge laps installed backwards or without adequate overlap. Documentation gaps also cause resubmissions — missing or unlabeled photographs, missing manufacturer installation guides, and missing fastener packaging labels all trigger review comments from IBHS.
HECS addresses these issues at the pre-construction kickoff by walking the builder and roofer through the FORTIFIED Roof compliance checklist before any shingles go down. That early alignment has consistently reduced the number of corrective site visits required.
What does a FORTIFIED Home Evaluator in Kentucky actually verify on a reroof project? HECS verifies the sealed roof deck, shingle attachment pattern, drip edge and flashing details, and roof-to-wall connections per the 2025 FORTIFIED Home Standard. Documentation includes date-stamped photographs, manufacturer installation guides, and a signed compliance statement submitted to IBHS for designation. The deliverable is the FORTIFIED Roof or FORTIFIED Silver designation certificate.
Does IBHS High Wind designation in Kentucky require a different roof covering than standard FORTIFIED? The High Wind designation layers on top of FORTIFIED Roof and requires enhanced roof-to-wall connection verification (typically double-wrap straps or engineered connectors) plus documentation of continuous load path. Roof covering requirements overlap with the standard FORTIFIED Roof designation. HECS handles both scopes on qualifying projects.
Can FORTIFIED Roof be combined with ENERGY STAR or NGBS certification on the same home? Yes. HECS routinely sequences FORTIFIED Home Evaluation alongside ENERGY STAR Multifamily Reviewer and NGBS Green Certified Verifier scopes on new construction. Documentation overlaps where blower door testing and thermal imaging are required by both programs, and HECS consolidates the inspection calendar to limit site visits.
HECS provides FORTIFIED Home Evaluation, ENERGY STAR certification, NGBS Green Certification, EarthCraft Certification, blower door testing, duct leakage testing, HVAC testing and balancing, radon testing, and 45L Tax Credit Certification across Kentucky, Indiana, Ohio, Tennessee, Illinois, and Missouri. Project kickoff begins with a scope call to align FORTIFIED designation targets with the builder's construction schedule. Contact HECS at (859) 983-7382 or hecs@hecsusa.com, or submit a scope request at hecsusa.com/contact/. Full service descriptions are at hecsusa.com/services/. HECS also serves Louisville KY, Lexington KY, Cincinnati OH, Indianapolis IN, Nashville TN, St. Louis MO, Chicago IL, Evansville IN, and Columbus OH — with regional teams positioned to respond to FORTIFIED project schedules on short notice.
One short email per month with code updates, testing data, and what HECS is seeing in the field across KY / IN / OH / TN / IL / MO. Unsubscribe in one click.