PURPOSE: To enhance construction performance for vertical panelling for longitudinal splice joints in dry type wall members in appearance, waterproofness and caulking.

CONSTITUTION: A water drip is made up of two members, that is, a bed batten B roughly in L shape in cross section and in continuous length, which has a fitting section for engagement and an engaging section at its end sections, and a cover C, and furthermore, the fitting section of the bed batten B is made higher in height than the engaging section of the cover C. The fitting section is integrated with the engaging section of the cover in such a way that the decorative surface section of the cover C does not cover the stationary section of the bed batten B.