PURPOSE: To secure the non-skid foot in roofing and carry out the smooth drainage by structuring the roofing members by arranging a plurality of uneveness parts formed from the projecting and recessed stripes on the upper surface of a roof ground, in parallel in a specific direction.

CONSTITUTION: On a roof member ground A, a plurality of recessed grooves 2 are formed in an equal interval so as to be parallel in the longitudinal direction by heating and pressing the upper surface of a waterproof sheet member 1 which is formed by laminating the synthetic resin sheets 1b. Between the contiguous recessed grooves 2, a number of projecting stripes 3 which are inclined aslantly, keeping a specific angle are formed in parallel, and the part between the contiguous projecting stripes 3 is formed to a projecting stripe 4. Further, each direction of the projecting stripe 3 and the recessed stripe 4 between the recessed stripes 2 is formed reverse, and the edge part of each recessed stripe 4 is allowed to communicate to the recessed groove 2. Then, a roof member is structured on the constitution in which the roof member sheet A which is thus constituted is laid over the whole surface on the roof ground such as the sheathing roof board.