PURPOSE: To perform roofing efficiently.

CONSTITUTION: A scaffold is erected on a wall face of a house 2, and a proper roofing member is additionally provided in a region A1 from an eaves end of roof to a predetermined position on the surface of the roof in a proper position of the scaffold 1. A ladder 4 having a length to a position of an upper end of the region A1 of which upper end is roofed is provided continuously at a proper position of the scaffold 1. Another roofing member 3 is additionally provided at the surface of the roof to a region A2 positioned upper than the region A1 roofed on the ladder 4. Then, another ladder 4' having the length to the position of the upper end of the region A. substantially is continuously provided at the ladder 4. Another roofing member 3 is additionally provided on the roof face to a region A3 at the position upper than the region A2 roofed on the ladder 4', and roofing work on the ladders 4, 4' as well as the continuous provision work of ladders are repeated to thereby additionally provide roofing members 3 in order from the end of eaves to the eaves direction.