PURPOSE: To improve the efficiency of execution, and to contribute the title method to labor saving by a method wherein a previously dressed building member is surrounded by a curing sheet, and fixed onto an external-wall, other surfaces are faced, and the exposed sheet is broken and discarded.

CONSTITUTION: In an external-wall finishing method ii which a previously dressed building member 1 is incorporated to one part of an external wall section 5 and the upper sections of other surfaces are faced, the building member 1 is surrounded by a curing sheet 3 having flexibility first. The curing sheet 3 is fixed temporarily and bonded at one position or more of the surface of the building member 1, and void sections are evacuated and the curing sheet 3 is fast stuck to the building member 1. The building member 1 surrounded by the curing sheet 3 is fastened at the required locations of the external wall section 5, the upper sections of other surfaces of the external wall section 5 are faced in a necessary manner, and the exposed sections of the curing sheet 3 are broken and discarded. Accordingly, surface protective operation at the time of the transport of the building member 1 and masking operation at the time of facing spraying can be worked in combination.