KERDI-SHOWER pre-fabricated trays are ideal for constructing a shower base and designed
to integrate with the Schluter Shower System. They are lightweight and easy to install. They
can also be cut to size and extended with dry pack mortar if required.
KERDI-SHOWER trays are available in an expanded range of sizes and configurations.
Some of these sizes feature reduced thickness to help facilitate curbless shower applications.
Our trays are also available with integrated waterproofing,
making shower installation even easier. Let’s take a look at the installation of
one of our KERDI-SHOWER-TT thin trays. Cut a hole in the substrate for the
Schluter-KERDI-DRAIN and coupling to the waste line using the template provided.
Do not use the opening in the shower tray as a guide. You must limit the diameter of
the hole to five inches maximum to ensure proper support for the tile assembly.
If there is access to the plumbing from below and the waste line can be connected
to the KERDI-DRAIN after installation, you can install the tray prior to the drain.
When there is no access to the plumbing from below, you will need to install
and connect the KERDI-DRAIN to the waste line before installing the shower tray.
Please refer to the No Access Plumbing Demonstration with
KERDI-DRAIN & KERDI-SHOWER Trays Video. The substrate must be clean, even,
load-bearing and level. Any leveling of the floor must be done prior to installing the tray.
The KERDI-SHOWER-TT is installed using any of our Schluter thin-set
mortars or…an unmodified thin-set mortar. A one-quarter inch by three-eighths inch square
or U-notched trowel is used to apply the mortar. Apply a thin layer of mortar to the subfloor
with the flat side of the trowel and then comb additional mortar using the
notched side of the trowel. Place the shower tray and
solidly embed in the mortar. If you are not immediately installing
the KERDI-DRAIN clean the mortar from the step in the shower tray and the area surrounding the
hole in the subfloor. Otherwise the dried mortar might interfere with your drain installation.
A curbless application can be achieved by installing a plywood or OSB
underlayment and DITRA-HEAT or DITRA-XL membranes over the bathroom floor.
Since we are raising the floor, the transition to the adjacent room must be checked.
The transition will typically be manageable when the adjacent floor covering is relatively thick,
such as a carpet with pad or three-quarter inch thick hardwood.
Another option for a curbless shower is to recess the floor. The shower subfloor is recessed and
DITRA-HEAT or DITRA-XL is installed over the bathroom floor to create a flush transition.
Proper support of all structures is critical for this assembly. Refer to the recessed curbless
shower video for more installation details. 015C When neither raising the bathroom floor
nor recessing the shower floor is not an option, a prefabricated shower tray and ramp,
like the KERDI-SHOWER-T or-TS shower tray and KERDI-SHOWER-SR shower ramp,
facilitate the transition between the shower and
bathroom floors. Montage of shower ramp installation and waterproofing. Finished
shot of a shower with a ramp. See brochure. 015D It is installed in the same manner as the
shower tray shown previously. The KERDI-SHOWER-
SR ramp adheres to the slope ratio required by the ADA.
The tray can also be installed in conjunction with our pre-fabricated shower curbs.
The KERDI-BOARD-SC shower curb is installed as per usual, using any of our Schluter thin-set
mortars….or an unmodified thin-set mortar. Make sure the mortar is applied to all points of
contact with the curb, including the subfloor, walls and the edge of the
shower tray for proper support. Embed the curb and make sure it is level.
Next we will install the KERDI-DRAIN. Fill the step in the shower tray and the
area surrounding the hole in the subfloor completely with thin-set mortar.
Press the KERDI-DRAIN firmly into the mortar for full support of the bonding flange.
Clean excess mortar from the bonding flange to prepare for the KERDI collar installation.
Use a Schluter®-KERDI-TROWEL or a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel
for the KERDI-installation. Using the flat side of the trowel
apply l thin-set mortar over the bonding flange and within the recessed area of the shower tray
surrounding the drain. Then comb additional mortar using the notched side of the trowel.
Center the included KERDI collar, over the KERDI-DRAIN and embed using the flat side of
the trowel or a dry wall taping knife. Make sure this connection is secure.
Using the same technique, install the KERDI-KERECK corners and KERDI-BAND waterproofing strips to
seal the shower tray to the walls and curb. Depending on project requirements and installer
preferences, the order of installation may vary. Two inch overlaps must be maintained
at all seams. The system is designed to be flexible and meet the needs of the installer.
The installation of the KERDI-SHOWER-TT thin tray, KERDI-DRAIN and waterproofing are now complete.
Schluter shower trays reduce installation time and make shower installation easier than ever.