COMBINATION OF REFORMING BUILDING MATERIALS FOR STAIRCASE

PROBLEM TO BE SOLVED: To decorate an inner side surface of a stringer by sequentially arranging a unit decorated side plate, a long decorated material main body, and a drooping piece connected to the main body and covering an inner side surface upper portion of the unit decorative side plate. SOLUTION: A unit decorated side plate 18 is stuck to an inner side surface 3a of a stringer 3 such that right and left edges of each of a decorated tread 12, a decorated riser 13 and a step edge decorative material 14 are covered. Thus, the inner side surface of the stringer 3 can be decorated, which leads to further complete reforming. Further, an upper surface of the stringer is decorated with a long decorative material 19 formed of a synthetic resin or the like. The long decorative material 19 has a main body 19a covering an upper surface of the unit decorated side plate 18 stuck to an upper surface and the inner side surface 3a of the stringer 3, and a drooping piece 19b covering the inner side surface upper portion of the unit decorated side plate 18 sequentially connected thereto. Thus, the inner side surface upper portion of the unit decorated side plate can be covered.