Identical asphalt shingles in different climates may perform differently due to variations in what?

Identical asphalt shingles can indeed perform differently in varying climates primarily due to the differences in climate zones. Each climate zone, whether hot, cold, humid, or dry, poses unique challenges and conditions that affect the lifespan and effectiveness of roofing materials, including asphalt shingles. For instance, in harsher, colder climates, shingles may be more prone to cracking and thermal expansion issues, while in hotter climates, they might experience issues with UV degradation and thermal fatigue. These climate-related factors influence how materials react over time, leading to a variance in longevity and performance, even among products that are otherwise identical.

Other factors like installation techniques, color and texture, and underlayment type do play a significant role in the overall roofing system performance but do not create the fundamental differences attributable to climate influences. Therefore, while they can affect the integrity and lifespan of a roofing system, the primary reason for performance variability between identical shingles is rooted in the distinct environmental conditions presented by different climate zones.