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How To Build A Walk In Shower Floor: A Step-By-Step Guide in 2023

When it comes to showers, there are a lot of different designs and styles that you can choose from. However, one type of shower that has become increasingly popular in recent years is the walk-in shower. A walk-in shower is a great option for those who want a stylish and modern looking shower, without having to sacrifice any space in their bathroom. And, while they may seem like they would be difficult to build, with our tips and tricks, we’ll show you how easy it can be!

What You’ll Need

Assuming you want to start from scratch, you will need these materials:
-Shower pan
-Pre slope
-Shower drain
-Waterproofing membrane
-Thinset mortar
-Sealer (optional)
In addition to these materials, you will need some tools:
-Tape measure
-Pencil or pen
-Chalk line
-Notched trowel
You may also need these depending on your circumstances:
-Drill and bits (to install the drain)
If you have any questions about whether or not you need something, feel free to reach out and ask!

Step One: Preparing The Area

If you are planning to build a walk in shower floor, the first step is to prepare the area. This means making sure that the space is clean and free of any debris or obstacles that could trip you up while working.

Once the area is prepped, you will need to measure the space so that you know how much material you will need to purchase. Then, it’s time to start building!

Step Two: Laying The Base

If you’re planning on having a tile floor in your shower, you’ll need to start with a solid base. This can be accomplished by using either mortar or cement backer board.

Mortar is a mixture of sand and cement that is used to set tiles. It is generally not recommended for use in showers because it is not as waterproof as other options.

Cement backer board is a type of drywall that is made specifically for wet areas like showers. It is important to use the right kind of screws when installing cement board so that it doesn’t come loose over time.

Once you have your base laid, you’re ready to move on to step three!

Step Three: Installing The Drain

After the mortar has dried, it’s time to install the drain. The first step is to mark the center of the drain hole on the floor. Then, using a hole saw, cut out the drain hole. Next, fit the rubber gasket onto the bottom of the drain and place it over the hole.

Now it’s time to attach the drain body to the gasket. There are typically two ways to do this: with screws or with a snap-fit connection. If your drain has screws, simply screw them in until tight. If your drain has a snap-fit connection, push down on it until you hear it click into place.

Once the drain is secure, finish up by attaching the overflow tube and cover plate (if applicable).

Step Four: Adding The Waterproofing Membrane

After the mortar bed has cured, it’s time to add the waterproofing membrane. This is a very important step in ensuring that your shower floor is properly protected from water damage.

There are a few different types of waterproofing membranes that can be used for this project. We recommend using a sheet membrane like Schluter Kerdi or NobleSeal TS. These products are easy to work with and will provide a great barrier against water.

To install the membrane, simply follow the manufacturer’s instructions. Generally, you’ll need to spread a layer of adhesive over the surface of the mortar bed and then lay down the sheet of membrane. Once the adhesive has dried, you can then grout the joints between the sheets of membrane.

Step Five: Applying The Thinset

After the mud is dry, it’s time to apply the thinset. This is a special type of mortar that is used for setting tile. It’s important to use thinset, rather than regular mortar, because it will bond better with the tile and waterproof your shower floor.

To apply the thinset, you’ll need a notched trowel. First, mix up a small batch of thinset according to the manufacturer’s instructions. Then, spread it onto the floor with the notched trowel. Cover an area that is about two feet square.

Now, it’s time to lay down your first tile. Center it in the middle of the area you just spread thinset on. Press it into place firmly. Then, continue laying down tiles until your entire shower floor is covered.

Once all of the tiles are in place, let the thinset cure for at least 24 hours before grouting or using your shower.

Step Six: Adding The Tile

After the mortar has had time to set, you can begin adding tile to the floor of your shower. Start by spreading a layer of thinset mortar over the area where you will be laying tile. Then, using a notched trowel, spread more thinset over the back of each individual tile. Be sure to smooth it out so that there are no air pockets.

Next, carefully place each tile into position on the floor. Once all of the tiles are in place, use a level to make sure that they are even and then let them sit for at least 24 hours before grouting.


A walk in shower floor can be a great addition to your home, and it’s not as difficult to build as you might think. With a little planning and some basic construction skills, you can have a beautiful new shower in no time. Use our tips to help you get started on your project, and don’t forget to consult with a professional if you have any questions along the way.

Samantha Allen

Samantha Allen

Samantha Allen is an authority on high-end spa treatments and steam showers. Through her blog, she provides insight and guidance into home improvement, deluxe spas, and steam showers. She offers comprehensive instructions for those wishing to maximize their at-home spa experience. Samantha has devoted countless hours to researching and evaluating various steam shower models to determine the finest ones available. Moreover, she is a practiced DIYer who has created video tutorials on a variety of topics related to home renovation and luxurious spa activities.