What is a consequence of improperly placed fasteners in roofing?

Improperly placed fasteners in roofing can result in shingle movement, which is a significant concern for the overall integrity of the roof system. When fasteners are not installed correctly, either too far from the edge or not spaced adequately, shingles can become loose or shift over time. This movement can lead to gaps that expose the underlying materials to water infiltration, increasing the risk of leaks and damage to the roofing structure. Proper fastening ensures that shingles remain secure and aligned, maintaining their protective function and preventing premature wear or failure.

In contrast, better waterproofing, lower installation cost, and more aesthetic appearance are not direct outcomes of improper fastener placement. Improper installation often compromises the roof's ability to keep water out, potentially increases installation costs due to future repairs, and does not enhance the look of the roofing system.