What is the likelihood of roof leakage from asphalt shingles exposed to UV light?

Asphalt shingles are designed with materials that can withstand exposure to UV light, but prolonged exposure can lead to wear and degradation over time. The likelihood of roof leakage from asphalt shingles specifically due to UV exposure is considered rare if the shingles are properly installed and maintained. While UV light can contribute to the aging process and reduce the integrity of the shingle over many years, it does not typically cause immediate leakage. Factors such as age, environmental conditions, and installation quality are more critical in determining leakage potential.

Additionally, when asphalt shingles are installed correctly with appropriate underlayment and flashing, they are capable of shedding water effectively, which further reduces the likelihood of leaks developing solely from UV exposure. Frequent or common leak occurrences are generally tied to other issues, such as improper installation, damage from weather events, or poor maintenance, rather than UV exposure alone. This understanding places the likelihood of leakage from UV exposure at a rare occurrence, reflecting the durability of modern asphalt shingles in typical conditions.