Under the new rules, a home with a newly installed asphalt shingle roof generally can remain eligible for FORTIFIED designation for up to 15 years from its initial designation. For an existing roof with a documented installation date, the 15-year clock instead begins with the roof's installation date.

New research showing significant differences in how asphalt shingles withstand wind after a decade of weather exposure is helping reshape eligibility requirements for the Insurance Institute for Business & Home Safety's (IBHS) FORTIFIED Home program.

The organization released findings from its long-running Roof Materials Aging Farm program in September, revealing that while many asphalt shingles initially gain wind resistance, most begin losing that resistance between five and 10 years of exposure. The rate of deterioration varies considerably by product, climate and installation conditions.

The changes could significantly affect roofing contractors in hurricane- and high-wind-prone markets, particularly those installing FORTIFIED roof systems or helping homeowners maintain their designations.

Research Reveals Wide Differences in Shingle Performance

IBHS scientists compared asphalt shingles exposed to 10 years of natural weathering at research sites in South Carolina, Wisconsin and Ohio with laboratory baseline products and shingles weathered for five years. The results showed substantial differences in long-term wind resistance, even among products carrying the industry's highest wind classification under current standards. Some products maintained strong wind resistance after a decade, while others experienced significant declines.

"Through our Roof Aging Farm program, we're learning how roofing materials perform throughout their service life, not just when they are new," said Jake Sorber, IBHS research project scientist and engineer. "These findings reinforce the importance of identifying products that can maintain durability and wind performance over time and across different climate regions."

Researchers identified shingle unsealing as the leading contributor to wind vulnerability. When the adhesive bond holding shingles against the roof weakens or fails, shingles become significantly more susceptible to wind damage. Products with the greatest tendency to unseal consistently demonstrated the highest probability of wind-related failure.

"One of the most important findings from this research is that multiple age-dependent variables govern the wind performance of asphalt shingles," Sorber said. "Some products maintained strong performance after 10 years, while others showed a significant decline in wind performance."

The findings also challenge assumptions about initial product ratings. Although every product evaluated carried the highest wind classification, researchers found those ratings did not reliably distinguish how individual products would perform after years of exposure.

Geography further complicated the results. Differences in solar radiation, temperature fluctuations and latitude affected sealant activation and long-term wind resistance. Roof orientation also influenced performance, with aging patterns varying among products and locations. The findings suggest contractors and property owners should consider more than initial wind ratings when evaluating roofing materials for long-term resilience.

FORTIFIED Introduces 15-Year Eligibility Limit

 Beginning Jan. 1, 2027, homes with asphalt shingles covering all or part of the required roof areas will be subject to a 15-year eligibility limit. FORTIFIED designations generally require renewal every five years, with inspections and documentation confirming that the property continues to meet program requirements. Under the new rules, eligibility depends on when the roof was installed and how the property originally qualified:

• New Roof designation: Homes receiving a FORTIFIED designation when a new asphalt shingle roof was installed will remain eligible for up to 15 years from the initial designation date.
• Existing Roof designation with a documented installation date: Eligibility is limited to 15 years from the roof's installation date, rather than the date the home first received its FORTIFIED designation.
• Existing Roof designation with an unknown installation date: Homes may receive one initial designation term of up to five years but cannot qualify for re-designation until the existing asphalt shingle roof covering is replaced.

Designation terms may also be shortened to prevent an expiration date from extending beyond the applicable eligibility limit. The new requirements apply to FORTIFIED Roof, Silver and Gold designations under the program's Hurricane and High Wind standards.

IBHS emphasizes that the 15-year limit is not a determination that asphalt shingle roofs must be replaced after 15 years. Instead, the restriction applies specifically to eligibility for the FORTIFIED program and does not establish the service life of asphalt shingles or determine whether an individual roof remains suitable for continued use.

What Happens to Existing FORTIFIED Roofs?

The bulletin includes provisions protecting existing designations. Homes with FORTIFIED designations issued before Jan. 1, 2027, will retain their current expiration dates, even if those dates extend beyond the new eligibility limit. However, applications for subsequent re-designations submitted on or after that date must comply with the updated requirements.

The rules also establish pathways for homeowners to restart eligibility after roof replacement. For homes covered entirely with asphalt shingles that have reached the eligibility limit, the entire roof system must be replaced and documented under current FORTIFIED New Roof requirements. Homes with a combination of asphalt shingles and other roofing materials have additional options. Those properties may qualify for another Existing Roof designation term after replacing the applicable asphalt shingle areas, provided the remaining roof coverings satisfy the program's requirements. A complete roof replacement can also restart eligibility under the New Roof designation pathway. 

Certified FORTIFIED Evaluators must document roof-covering type, condition and continued compliance during re-designation. When installation dates determine eligibility, supporting documentation must establish when the asphalt shingles were installed.  

What the Changes Mean for Roofing Contractors

The new eligibility requirements place greater emphasis on roof age, product identification and installation records. For roofing contractors participating in FORTIFIED projects, maintaining accurate documentation of roof installation dates could become increasingly important as homeowners approach their re-designation deadlines.

Contractors working on existing FORTIFIED properties may also need to explain the distinction between a roof's physical condition and its eligibility for continued program designation. A roof could remain serviceable beyond 15 years while no longer qualifying for FORTIFIED re-designation under the new rules.

The requirements could also influence replacement discussions in markets where FORTIFIED designations are tied to insurance incentives or resilience programs. Homeowners seeking to maintain their designations may need to consider replacement timelines separately from conventional assessments of roof condition. Meanwhile, the research raises broader questions about how manufacturers evaluate and communicate long-term shingle performance.  

For contractors, the emerging findings reinforce the importance of proper installation, maintaining shingle sealant bonds and understanding how individual products respond to years of weather exposure. The research also suggests that a shingle's initial wind classification may tell only part of the story about how well it will protect a home years after installation.