Why is the angle of wind critical for asphalt shingle performance?

The angle of wind is crucial for the performance of asphalt shingles primarily because it impacts wind resistance. When shingles are installed, they are designed to resist uplift forces created by wind. If the wind blows at an angle that is not favorable, it can create pressure differences on the surface of the shingles, potentially leading to premature lifting, tearing, or even dislodgment of the shingles.

Different angles of wind can also cause water to be driven under shingles, which can increase the likelihood of leaks and water damage. Understanding wind angles helps ensure that shingles are installed in a manner that mitigates these risks, especially in areas prone to high winds. Proper installation techniques and guidelines can enhance shingles' ability to resist these forces, preserving the integrity of the roofing system. This consideration is vital for ensuring the long-term durability and performance of asphalt shingles.