How To: Install the Collapsible Water Dam In A Round Shower Stall

March 21, 2018

How To: Install the Collapsible Water Dam In A Round Shower Stall

Collapsible water retainer shower dams are essential for all roll-in showers.

The Collapsible Water Dams are designed to prevent dangerous and costly water spillage in the curbless shower stall. Controlling water spillage will reduce your home or facility's potential liability and maintenance.

The proper installation of the dam must begin with determining your shower stall's corner design.The dams are available for modular showers, which have the rounded corners. The dams are also available for tile showers or shower pans with square corners.

Each of these style shower stalls requires different measurement and end caps. Below is an overview of the proper installation of a Collapsible Dam into a rounded shower with the rounded or radius style end cap. This style end cap and installation process are ideal for shower stalls with a rounded corner.


collapsible water dam - radius

The threshold dam is intended to follow the shower's corner edge up the stall and the threshold dam's end cap will give it a sealed and finished look. If your shower has a right-angled or square style corner, here is our guide to installing the dam into a tile shower or where the dam's square style end caps would be required. 


Before You Start:

Determine if you have the proper radius or rounded end cap for your shower. These caps will create a proper fit and finish. They will also help in keeping the shower’s curtain within the dam's barrier.

Incorporating an adequately measured Weighted Shower Curtain will provide the most complete and effective water control solution. Ensure you have the correct length of the dam for your shower’s opening. Typically for radius corners, you will need to purchase 6" ( 3" on either side) more than the shower's opening to cover the transition effectively. 

(Custom length water dams are available)

Special Note: 1.5” wide flat surface is necessary for proper mounting.

Determine where you will be mounting the Collapsible Water Dam. See if your fiberglass-reinforced shower has a small molded ridge or “water runoff assist” design. This ridge should be on the floor roughly 1-3” from the front entry edge of your shower unit. The inside of the edge of the dam should rest on the crown of the ridge allowing the water to run off properly. Use this ridge as your guide to mounting the collapsible barrier parallel to this ridge.

If your shower does not have the water run-off style design ridge, you must then decide the proper location for installation.

Tools & Materials Required:

Utility Knife
Tape measure
Straight edge
Clear or white silicone adhesive caulk
Masking tape
Rubbing alcohol
Bucket of water
Clean rags


1. Clean the threshold’s surface of all soap scum and debris using regular bath cleanser. Then, chemically clean the threshold’s surface with rubbing alcohol

2. Double check the required length for your Collapsible Water Dam by estimating the vertical rise necessary in the corner’s transition. Make sure that there is enough Water Dam to make this rise on either end.

3. Measure and mark the center point of the shower

4. Measure and make the center point of the Collapsible Water Dam’s strip

5. Turn over the Water Dam and cut on the orange peel of strip at the halfway mark. Peel of a small portion (roughly 4”) of the orange strip in one direction to expose the adhesive.

6. Line up the water dam with the pre-determined halfway mark or molded ridge crown of the shower starting at the halfway mark. Press on and stick the 4” strip of exposed adhesive. Pull and stretch the water dam and align before removing the remainder of the orange peel of strip. Press firmly into place

7. Peel, stretch, aline and pull the remaining half of the Water Dam to the wall. Press firmly into place

8. Push in the male end of the end cap into the water dam. Stick the end cap to the Water Dam with clear or white adhesive caulk and wipe clean.

9. Use masking tape to temporarily hold the Water Dam’s end cap in place until the caulk has dried.

10. (Optional) The outer edges beneath the retainer may be caulked if desired to prevent soap or shower debris from getting underneath the Water Dam. The Dam’s adhesive intentionally does not extend to the dam’s edge to allow it to absorb the impact of a rolling shower chair (collapse). Clean off any of this extra caulk and let dry before beginning use of the shower.

Now your Modular shower has a long-lasting, easy to clean, bacterial and stain resistant barrier.

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