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How to Make a Shower Out of River Rock

River rocks are naturally smooth due to the tumbling environment of flowing rivers and streams. The smooth and sleek rocks lend themselves perfectly to a tiling application, such as installing flat river rocks instead of standard ceramic tiles on shower walls to create a natural- and rustic-looking shower space. Collect river rocks for free, where permitted, while on a nature walk, or purchase them inexpensively from a home-improvement store. Use 1/2-inch thick, flat river rocks for the project.

Things You'll Need

  • Electric sander
  • Fine-grit sanding belt
  • Shop vacuum cleaner
  • Medium grout
  • Trowel
  • Washcloth
  • Waterproof, polyurethane sealant
  • Paintbrush, 3 inches wide
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Instructions

    • 1

      Sand the surface of the bare shower walls using an electric sander with a fine-grit sanding belt. That task will remove debris and roughness from the surface.

    • 2

      Vacuum the shower walls and surrounding areas with a shop vacuum cleaner.

    • 3

      Spread a 1-inch thick layer of medium grout over the shower walls with a trowel.

    • 4

      Press 1/2-inch thick, flat river rocks halfway into the grout, spacing the rocks 1/4 inch apart from each other.

    • 5

      Spread a 1/4-inch thick layer of medium grout over the rocks. Scrape off excess grout with the trowel.

    • 6

      Wipe off the surface of each river rock with a damp washcloth. Allow the river rock walls to air-dry for 24 to 36 hours.

    • 7

      Provide ventilation for the shower area. Apply a layer of waterproof, polyurethane sealant over each entire river rock wall using a 3-inch wide paintbrush. Continue to ventilate the area well while you apply the sealant. Allow the sealant to dry for eight hours.