The shape of roofing tiles is critical to a home's structural integrity. Interlocking profiles create a mechanical barrier that prevents lateral water migration, while curved tiles (like S-tiles) facilitate rapid drainage and airflow, reducing heat retention. High-profile shapes break wind speed, preventing "wind uplift" that can detach flat shingles. By directing runoff into specific channels, tile geometry ensures moisture exits the roof deck before it can penetrate the underlayment.