What is the typical minimum headlap for tile roofing?

The typical minimum headlap for tile roofing is 3 inches. Headlap refers to the vertical distance that the upper course of roofing tiles overlaps the tiles below, which is crucial for preventing water infiltration and ensuring proper drainage. A minimum headlap of 3 inches helps ensure that any water running down the surface of the tiles will be directed away from the seam where the tiles overlap, thereby reducing the risk of leaks and extending the life of the roofing system. This specification is generally recommended by roofing manufacturers and construction codes, as it strikes a balance between effective waterproofing and material efficiency. Properly installing tiles with the correct headlap not only assures a weather-tight assembly but also promotes the overall durability of the roofing structure.