Abstract: A method for forming a coved backsplash system, comprising two adjacent perpendicular wall sections joined by a curved corner joint. In particular, a designed relief, or groove, is formed on the rear surface of the material at a predetermined depth. The grooved material is placed on a shaped mandrel having the capacity of maintaining controlled heating, limited to the area being formed on the material. The grooved area is also heated by a device in conjunction with the surface area being heated by the mandrel. The solid surface material is brought to a thermoforming temperature by conductivity of the heat generated in the mandrel and heating devices. A wiping arm is used to form the solid surface material to the mandrel, the solid surface material being brought in contact with a flat work surface by the wiping arm. The non-grooved, flat surface areas of the material are then held in place by the wiping arm while the solid surface material begins the cooling process.