Abstract: A system is provided for converting a bathtub area into an enclosed substantially waterproof shower enclosure by means of adding or modifying the shower curtain installation by providing inner closure channels at each end of the shower curtain as well as corresponding outer retention channels that are easily fixed onto opposed walls in the bathtub enclosure for sealingly receiving the side edges of the curtain in a waterproof relationship. Each end of the shower curtain is retained within a vertically disposed U-shaped inner channel having longitudinal ridges within the U-shaped channel for retention of a flexible slit grommet spline or locking rod running lengthwise. The edge of the shower curtain is inserted into the flexible spline or locking rod which is then pressed fitted into the inner U-shaped channel.

Abstract: A system from converting a bathtub area into an enclosed substantially waterproof shower enclosure. Closure frames are mounted at each end of the shower curtain to engage retention frames mounted on opposed walls of the enclosure. Each end of the shower curtain is retained within a vertically disposed U-shaped channel having longitudinal ridges therein and a flexible rubber grommet spline or locking rod running lengthwise. The preferred material is rigid PVC. The edge of the shower curtain is rolled about the flexible spline which is then press filled into the U-shaped channel. The curtain is frictionally secured between the spline and the internal walls of the U-shaped channel.