Partition walls serve many purposes, but in each case, they set something apart from the rest of a room. The same is true for the bathroom. In order for a partition wall to work well in a bathroom there must be sufficient room. Otherwise, the room becomes crowded and feels small. Since they do not have to go from floor to ceiling, in most cases, this is a do-it-yourself project that can be accomplished with confidence.
Locate and mark two studs in the area of the existing wall where the proposed partition wall will tie in. Measure from the existing wall out to the desired length of the partition wall and mark the floor accordingly.
Place the two 48-inch pieces (top and bottom plates) on a worktable. Measure from one end and make a mark every 16-inches. Next, make a mark 3/4-inch on either side of the 16-inch marks. Place the framing square on the marks and draw lines across the lumber.
Set the 69-inch lumber between the lines on the top and bottom plates and secure them with 16-penny nails. Secure one stud on each end of the wall in the same manner and set the frame in place. Put the carpenter's level on the wall and adjust it until it is plumb. Trace the edge of the stud onto the wall for reference.
Hold the end stud on the line and drill three holes through it and the wall with the 1/8-inch drill bit. Change the drill bit to the size that matches the width of the spring-wing nut of the toggle bolt when squeezed together. Drill on top of the holes you just drilled to make them large enough to accept the nut.
Remove the nuts from the bolts. Slip a washer over the bolt, insert it through the hole in the stud and thread the nut back on. Position the toggle bolts over the holes in the wall, squeeze the nuts together and push them through the holes. Tighten them with a screwdriver.
Measure the distance from the shower to the partition wall where it meets the existing wall. Adjust the other end of the wall until it is the same measurement. Secure the bottom plate to the floor with 2 1/4-inch drywall screws.
Install the 48 by 72-inch pieces of drywall on the 48-inch sides of the partition wall with 1 1/4-inch drywall screws. Secure the 4 3/4-inch piece of drywall on the end of the partition wall in the same manner.
Put the 1 by 8 by 49-inch lumber on the worktable (wall topper). Make marks on one end of the lumber 2-inches from the corners. Place the framing square on the mark and draw a 2-inch line. Stick the point of the compass on the end of the line and draw an arc from the end to the long edge.
Cut the arcs with a jigsaw and sand the cut edge. Center the topper on top of the wall and push it against the existing wall. Secure it with the finish nails.
Finish the partition wall as desired.
Do not leave power tools within the reach of children. Do not leave loose nails within the reach of children.