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Button punch

Button punching is a metalworking technique used to create a mechanical interlock between two metal panels, typically used in standing seam metal roofing systems. The process involves using a punch tool to create a small dimple or “button” on one panel and then crimping the adjacent panel into the dimple using a mechanical tool. This creates a secure connection between the two panels and helps to prevent water infiltration and air leaks. This technique also enhances wind resistance and improves the overall durability of the roofing structure, providing long-term reliability. Button punching is a common method for creating standing seam roof panels, which are used in both commercial and residential roofing applications.