What should be monitored to ensure roof longevity with asphalt shingles?

Monitoring granule loss and the integrity of the asphalt shingles' surface is crucial for ensuring the longevity of the roof. The granules on asphalt shingles serve multiple purposes, including UV protection and minimizing the risk of algae growth and other forms of weathering. When granules are lost due to age or severe weather conditions, the shingles become more vulnerable to damage from the elements.

Additionally, any compromise to the integrity of the surface—such as cracks, blisters, or curling—can lead to leaks and further deterioration of the roofing system. By regularly inspecting for these issues, homeowners can take proactive measures to address them before they result in more significant problems, ensuring that the roof remains functional and extends its lifespan.

The other options present considerations that may not significantly impact roof longevity. The weight added from shingles over time is generally not a primary concern, as roofs are typically designed to bear the weight of shingles. Mixing different types of shingles can lead to aesthetic and performance issues, but it isn’t a direct factor in longevity if the materials are compatible. Finally, underlayment is essential for roof protection, and removing it can lead to significant performance issues rather than enhancing longevity.