To shorten a construction period by greatly reducing field work and securing stable quality.

A functional member protruding to the front or back side of a waterproof sheet made of a urethane resin-based waterproof resin material is molded. The functional member is a part that is provided at an end of the sheet to serve as a water drip. Additionally, an insertion protrusion for making an entry into an anchor groove is formed on a base, and a water drip cover part is formed on the tip side of the base.