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Shower Pan Curb Prep for Wedi Fundo Primo

Part 2 of How to Build a Curbed Subway Tile Shower

As Seen On
Shower Pan Curb Prep

Learning how to install a shower pan begins with good prep.

And installing shower pan systems like the Wedi Fundo Primo requires the correct curb and pan size.

But some installers carelessly jump right into the shower pan curb installation.

Doing that without considering how the curb will affect the shower tile can be a BIG mistake.

Today, we’ll show you the shower kit we used and how to plan the curb location so that your finished tile looks awesome.

The Wedi Fundo Primo Shower System

We chose the Wedi Fundo Primo shower system for this shower for several reasons.

wedi Fundo Primo Shower System

First, the Fundo Primo’s lean curb makes the shower feel larger. The curb is only 2 inches wide and 3.5 inches tall.

This allowed us to use a 4 inch quartz top instead of a 6 inch top.

Second, the Fundo Primo’s shower pan can be cut to size. Customization like this helps with the drain installation.

Third, the kit comes with everything you need to completely waterproof a curbed walk-in shower. This is HUGE and takes the guesswork out of what’s necessary for the project.

Finally, the Fundo Primo is super easy to install and works very well with the Wedi backer boards.


We liked this shower kit for all these reasons and think it’s one of the most user friendly out there.

Keep in mind, Wedi also has a great curbless shower system. That installation is different but also very straight forward.


Shower Pan Curb Prep

First, cut out the subfloor next to the old drain using a reciprocating saw.

Cut plywood for wedi fundo primo

Then cut out the old drain and P-Trap using the same saw or multi-tool.

We like Fein’s MultiTalent for jobs like this because it fits in tight spaces.

Cut down the Fundo Primo’s lean curb using a miter saw or hack saw. Our video shows how easy it is to cut.

Cut wedi Fundo Primo Shower Curb

If the shower has a bench, cut a piece of Wedi backer board and screw it to the side of the bench.

Then position the Wedi Fundo Primo Lean curb in the shower pan area.

And dry fit a piece of wood or marble that’s the same width as the curb top.

Dry fit curb top

Account for the curb top’s overhang and dry fit it such that the top is flush with edge of the Wedi on the vertical part of the shower bench.

This will set the width of the shower pan at both the front and back of the shower.

You’ll see in our video why shower pan curb prep is critically important for the wall tile.


Cut the Existing Tile Floor

In this bathroom we kept the old tile floor.

As such we marked and cut the tile using Fein’s WSG7 angle grinder and Montolit’s CGX115 diamond blade.

Cut floor tile for wedi curb

You’ll see in the video that Steve held a sponge on the blade to cut down on dust.

PLEASE be super careful when using an angle grinder and don’t do anything that would harm yourself or others (our disclaimer!!).

If you’re replacing the tile floor we highly recommend using DITRA or DITRA-HEAT underneath it to prevent cracked tiles.

Plus, having a heated floor in cold climates (like Pittsburgh!) is awesome.

Watch our video for all the details on how to properly do shower curb prep for the Wedi Fundo Primo


What’s Next

Our prior tutorial in this series shared how to install a shower bench seat using 2x4s and plywood. This is a great way to save money during a shower remodel.

If you’re doing a bathroom remodel and want to simplify the process enroll into the Bathroom Repair Tutor Video Library

We show how to build showers (Schluter, Wedi, Curbless, etc.), install tile, upgrade basement bathrooms, and more.

The extra guidance is invaluable

Enroll Today



Jeff Patterson





  1. Beck says:

    Wow. Something to consider wedi shower kit all in one. Thank you.

    1. Thanks Beck, it’s a great system and nice option for homeowners.

  2. Nigel William says:

    Excellent article as always! This article saved my life today! Thank you.

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