Waterproof grade one -level metal roofing of upright lockstitching a border

The utility model relates to a waterproof grade one -level metal roofing of upright lockstitching a border, the technical problem of the waterproof grade of improvement metal roofing engineering will be solved to the purpose, belongs to roof bracing system engineering technical field. The technical scheme who adopts is: put waterproof liner between metal roofing support and the flexible waterproof coiled material, the identical unanimous recess of shape, size and support bottom is put to the upper surface of waterproof liner, and the peripheral and peripheral inseparable laminating of metal support lower extreme of recess, the interior side that some annular protrusion were put to the lower surface of waterproof liner has and bores fixed screw in advance. The beneficial effects are that: the support bottom surface is peripheral closely laminates with waterproof liner is peripheral, prevents effectively that the rainwater from permeating in the screw fixation hole of waterproof liner, waterproof liner lower surface annular protrusion's interior side has to bore in advance fixes the screw, stops the rainwater outside annular protrusion. Whole waterproof performance is good for the roofing, reaches waterproof grade one -level, simple, simple to operate rational in infrastructure.