Patent ID: 8156702

Claim:
A waterproof ceiling comprising: a hanger unit securable at an upper end thereof to a predetermined portion of an existing ceiling to support a load on a lower end of the hanger unit; a carrying channel connected to the lower end of the hanger unit so as to be at right angles with the hanger unit; a drain module bar connected and secured to a predetermined portion on the carrying channel, forming a predetermined angle to create a flow passage for leaked water; a waterproof panel fitted to each of both sides of the drain module bar, thus closing a space between drain module bars; and a water collecting pipe provided horizontally on an end of the drain module bar, thus collecting the leaked water and discharging the leaked water to an outside, wherein the drain module bar comprises: a sidewall bent at both ends thereof outwards, and having at an upper end thereof a sealing groove so that a sealing member is inserted into the sealing groove; a fitting groove formed inside the sidewall such that each of both ends of the waterproof panel is fitted into the fitting groove; and a groove-shaped rail provided in an outer surface of a bottom closing off lower ends of both sides of the sidewall so that a puzzle anchor can be inserted into the rail.