What is one common reason for roof leaks?

One common reason for roof leaks is the improper installation of roofing materials. When roofing materials are not installed according to the manufacturer's specifications or best practices, it can lead to vulnerabilities that allow water to penetrate the roof. For example, misaligned shingles, inadequate sealing around flashings, or incorrect overlapping can all create pathways for water to enter.

In contrast, while heavy roofing materials could pose a structural concern if the underlying framing isn't adequately designed to support them, they are not a direct cause of leaks. Natural wear from age is a factor, but it tends to be a gradual process and does not encompass the immediate issues that arise from improper installation. Decorative features, while they may affect the aesthetics or drainage of a roof, do not typically contribute to leaks directly unless they interfere with proper sealing or water flow. Hence, the significance of proper installation cannot be underestimated in maintaining a watertight roof.