A roof ridge shingle unit including: a substantially elongated cover element shaped like a plurality of shingles longitudinally overlapping partially each other and having a substantially inverted V-shaped transversal cross-sectional configuration defining a pair of opposed side edges and a zenith ridge extending longitudinally therealong between the side edges, the cover element defining a top surface and an opposed bottom surface, the cover element defining longitudinally opposed first and second ends; and a first end attachment provided substantially adjacent the first end and a second end attachment provided substantially adjacent the second end. The first and second end attachments are configured and sized so that the first end attachment of the roof shingle unit is attachable to the second end attachment of a similar roof shingle units so that the roof ridge shingle units are secured to each other in a predetermined positional relationship relative to each other.