How To Build A Shower Bench Seat – DIY Guide

Nowadays, building a spa-like shower is fast becoming a common trend among many homeowners and it is for a good reason. A shower bench seat can really make your showering experience much more enjoyable. Apart from giving you comfort while showering, a bathroom bench can also to keep a wide range of showering accessories. In addition, it serves as a useful bathing accessory for the elderly.

Now that we have seen how valuable a shower bench is, we will learn how to make one presuming that the shower stall is already in place. With that, here are the steps on how to build a shower bench seat that will enhance your bathroom experience and increase your home value.

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How To Build A Shower Bench Seat

Materials That You Will Need:

  • Galvanized screws
  • Concrete anchor screws
  • Concrete bit
  • Drill
  • 2/4-inch lumber
  • 0.75-inch plywood
  • Tubes of silicone
  • Saw
  • Tape measure
  • Mortar
  • Trowel
  • Ceramic Tile
  • Backer boards
  • A PVC pan liner

Step 1: Measuring and Making Plans

Presuming that your shower stall has already been built, you will now need to determine the size and shape of your bench about your shower size. To do this, measure the size of your shower stall and select the location you want your shower bench to be in.

The most common place for seating a shower bench is the corner of the shower stall which gives the seat a triangular shape. Now use an old chair to determine the right height for your shower bench seat. After you have come up with these measurements, you can now draw your plan and buy the materials as per your measurements.

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Step 2: Framing

With your plan in mind, mark the position of your shower bench seat. When building the frame, keep in mind that there needs to be a slight slope of about 0.5 inches for every foot to allow water to easily run off.

Attach the frame to the backside of your shower stall. Apply silicone in each and every place where wood meets with tile to prevent any leakages. This should be done in the subsequent steps as well.


Step 3: Attaching the Side and Sub-Seat

After you have framed the bench, measure and cut two pieces from your 0.75-inch plywood. Use one half for the sub-seat and the other half for the side. Using galvanized screws, attach the two parts securely to the farming. Use silicone to seal everything.

Step 4: Waterproofing

To waterproof your shower bench, spread the PVC pan liner over the sub-seat and also on the downward sides of the shower bench seat. You can fasten it to the framing by nailing or stapling it. Seal the edged using silicone to keep water from seeping in below the liner.

Step 5: Adding the Backer Boards

The backboard should be installed from the bottom up to enable all the other pieces to overlap the lower portions of the bench. Cut your backer boards and use galvanized screws to attach them in the same manner as you did with the plywood pieces.

Step 6: Tiling and Grouting

Using the trowel, apply a light layer of mortar to coat the backer boards. After that, lay the ceramic tile and let it set for not less than 48 hours.

Mix some grout and use a sponge to smooth it into the seams. Wait for at least 30 minutes and then wipe the tiles using a clean sponge. Wait for 24 hours before you seal the grout.

Tiling and Grouting

NB: It is advisable to give the mortar from 3 to 4 days to dry before you run any water in your shower. You should also contact an authorized plumber before embarking on the drilling to prevent accidentally puncturing pipes or causing any other damage.


Whatever the reason may be for building a shower bench, it will definitely be an exceptional addition that significantly enhances the look and value of your home. It will allow you to sit down while in the shower and give you a spa-like atmosphere.

A person who is suffering from an injury will be able to shower without having to stand, and even someone in a wheelchair will be able to use it to transition from their wheelchair easily and safely into the shower.

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