A roofing coupler is a device used to connect two pieces of roofing material together. It is used to join two sections of a roof and to provide a secure connection. Roofing couplers come in a variety of shapes, sizes, and materials and are usually used to connect two sheets of metal, such as those found in a standing seam system. They are also used to join two sections of asphalt shingles, tile, or other roofing material. Roofing couplers are designed to be waterproof and provide a secure connection between the two pieces of material.