Facing having two-layered structure and manufacturing method for the same

A backing molding material preparation step 21 for a two-layered facing 1 has a papermaking step 22 in which a paper is made that is coated with a binding agent and dried to obtain a paper sheet 4; a cutting step 23 in which the paper sheet 4 is cut into a tape-like form; a bending step 24 in which a lengthwise crease is made in the tape-like paper sheet 4; a winding step 25 in which the creased paper sheet 4 wound into a ring shape to obtain backing molding material 5. Afterwards, in the molding step 31, the two-layered facing 1 having multiple air cavities 6 is manufactured by laminating together the front material 2 manufactured in front material preparation step 11 and the creased backing molding material 5 manufactured in the backing material preparation step 21 and thermally molding the two materials integrally together while applying pressure.