#None #asphalt shingles #IBHS #Richburg #Wind Performance

Exploring the Long-Term Aging Effects on Asphalt Shingles

Introduction

In recent research conducted by the Insurance Institute for Business & Home Safety (IBHS), it was revealed that asphalt shingles, a common roofing material, display varying levels of wind performance as they age under real-world weather conditions. This study sheds light on the importance of understanding these differences for homeowners and contractors alike.

Research Overview

The IBHS initiated its Roof Materials Aging Farm program in 2013 to evaluate how different roofing materials withstand aging processes like wind, hail, and fire exposure across various climates. The focus has been on observing how asphalt shingles perform over a decade, with assessments being made in South Carolina, Wisconsin, and Ohio.

Key Findings

Variability in Wind Performance

One of the most striking findings of this study is the significant variability in wind performance among different asphalt shingle products. Although many products demonstrate enhanced wind resistance in their initial years, a notable decline in performance generally occurs between the five- and ten-year marks. The rate and severity of this decline, however, vary significantly from one product to another.

Jake Sorber, an IBHS research project scientist, revealed, "Through our Roof Aging Farm program, we're learning how roofing materials perform throughout their service life, not just when they are new." This finding emphasizes the necessity for homeowners to identify shingles that will maintain durability in both performance and longevity.

Sealant Vulnerability

Another critical discovery from the research was that the unsealing of shingles greatly contributes to their vulnerability during high winds. Loss of the sealant—which firmly holds the shingles against the roof—heightens the risk of failure when facing strong winds. Products with a higher tendency to unseal were consistently found to have a greater risk of experiencing wind-related failure.

Age-Dependent Variables

The research determined that wind performance in asphalt shingles is governed by multiple age-dependent factors. While some products performed well after ten years, others suffered a significant reduction in their wind resistance. Consistent sealing and the integrity of the sealant bond over time emerged as vital factors in determining performance during severe weather events.

Influence of Geography

Geographical conditions play a significant role in the aging of asphalt shingles. Variations in solar radiation, temperature cycles, and latitude significantly influenced how shingles aged and performed. For instance, the study highlighted that differences in climate can affect the activation of sealants and long-term wind resistance, illustrating a complex relationship between environmental conditions and shingle performance.

Conclusion

The IBHS's findings extend beyond mere product classification. Current industry standards may label many tested shingles with the highest wind resistance ratings, yet the long-term results reveal a dichotomy in performance outcomes after aging. Understanding the intricate variables influencing long-term performance is essential for future homeowners and builders in making informed decisions.

As the IBHS continues its Roof Material Aging Farm program until at least 2045, we can expect to gather a comprehensive dataset on roofing material performance that will aid in enhancing construction practices for durability against natural disasters. The complete report titled "10-Year Wind Performance of Asphalt Shingles" is available through IBHS for those interested in the intricate dynamics of roofing material longevity.

About IBHS

The Insurance Institute for Business & Home Safety is dedicated to conducting objective research that promotes resilience in homes and communities against natural disasters. Their mission focuses on strengthening building techniques for enhanced safety and reliability.