Schluter®-KERDI-SHOWER-KIT


The Schluter-KERDI-SHOWER-KIT offers everything
needed to create a waterproof, vapor-tight shower assembly. The kit contains all the components necessary
to prepare your shower for tile, in one convenient package. Let’s take a look at what’s inside. A roll of KERDI waterproofing membrane is
included, which is used to protect walls from moisture penetration. You will also find KERDI-BAND waterproofing
strips, to seal all seams and connections. KERDI-KERECK preformed inside and outside
corners are supplied to easily seal vulnerable areas of your shower. A KERDI-SEAL-PS pipe seal and a KERDI-SEAL-MV
mixing valve seal are included. These are used
to seal pipe protrusions and protect moisture-sensitive solid backing panels. All kits contain a KERDI-SHOWER-T, TS or TT
sloped shower tray with integrated KERDI waterproofing. The trays are available in a variety of sizes
and configurations. You also get a KERDI-BOARD-SC shower curb
which is waterproof, lightweight and ready to tile. And finally, a KERDI-DRAIN floor drain with
an integrated bonding flange that connects to the KERDI waterproofing membrane on the
tray. KERDI-DRAIN accepts the included fully adjustable
square grate assembly. KERDI-SHOWER-KITS are available in a variety
of shapes and configurations. Some kits do not include the drain or grate
to allow for more flexibility in flange and grate selection. Let’s take a look at how to install the
kit. Always refer to the Schluter®-Shower Installation
Handbook, which provides specific installation requirements and instructions. Now let’s start by installing Schluter®-KERDI
waterproofing membrane over the walls. In this shower, gypsum board is used as solid
backing, though other panels, such as tile backer boards, may be used instead. If the Schluter-KERDI-BOARD-SN prefabricated
shower niche (sold separately) will be used, consider installing the niche prior to the
KERDI membrane. Please refer to the KERDI-BOARD-SN Shower
Niche within KERDI Assembly Video for details. The KERDI membrane is bonded to the walls
using any of our Schluter® Thin-set mortars or an unmodified thin-set mortar. The mortar is mixed to a fairly fluid consistency,
but still able to hold a notch. A 1/4 inch x 3/16 inch V-notched trowel or
the Schluter-KERDI-TROWEL, which features a 1/8 inch x 1/8 inch square-notched design,
is used to apply the mortar. Wipe down the walls with a damp sponge to
remove any dust. For particularly dry and porous substrates
it is recommended to wet the substrate first, in order to help prevent premature drying
or skinning of the thin-set mortar. Apply a thin layer of mortar to the wall with
the flat side of the trowel to produce solid contact with the surface and then comb additional
mortar using the notched side of the trowel. The walls must be covered with the KERDI membrane
up to the showerhead at minimum. Embed the KERDI membrane into the thin-set
mortar using the flat side of the trowel or a drywall finishing knife to ensure full coverage
and remove air pockets. Periodically peel the KERDI back to check
for coverage. Proper installation results in full contact
between the fleece and thin-set mortar. Re-embed the membrane. The KERDI membrane application is continued
on adjacent walls. Waterproof integrity is maintained at joints
by using a 2 inch overlap. Here we are demonstrating a lap seam on the
plumbing wall. In a lap seam the second piece of KERDI is
placed over top of the first with a minimum 2“ overlap. Be sure to get the KERDI tightly into the
corner without damaging the membrane. Next, on the back wall, we will install KERDI-BAND
over a butt seam. In a butt joint he KERDI sheets are placed
edge to edge and then covered with a piece of KERDI-BAND centered over the joint. Using the flat side of the trowel apply thinset
mortar to the area where the banding is to be installed. Then apply additional mortar using the notched
side. Embed the KERDI-BAND into the thin-set mortar. Since KERDI-BAND is one-half the thickness
of the KERDI membrane, build-up at seams is minimized using this method. Next we will install the KERDI-SEALs at the
pipe protrusion and mixing valve. Apply thin-set mortar to the area where the
KERDI-SEALS will be installed. Place the seals and embed them into the mortar. Schluter-KERDI-SEAL-PS is used to seal protrusions
through the KERDI membrane at the showerhead. Schluter-KERDI-SEAL-MV is used to protect
moisture-sensitive solid backing such as gypsum board at the mixing valve. As an alternative to using the KERDI-SEAL’s,
KERDI-FIX or other suitable sealant can be used in these areas. The walls are now waterproof and vapor tight. Schluter-KERDI-SHOWER-T, -TS, and -TT prefabricated
sloped shower trays are made of lightweight, expanded polystyrene with integrated KERDI
waterproofing. They are ideal for constructing shower bases
and can be cut to size with a utility knife or extended with dry pack mortar as required. If there is access to the plumbing from below
and the waste line can be connected to the Schluter-KERDI-DRAIN after installation, the
tray can be installed prior to the drain. When there is no access to the plumbing from
below, install and connect the KERDI-DRAIN to the waste line prior to the installation
of the shower tray. Please refer to the No Access Plumbing Demonstration
with KERDI-DRAIN & KERDI-SHOWER Trays Video for this method and return to this video when
that work is complete. The substrate must be clean, even and load-bearing. Any leveling of the floor must be done prior
to the installation of the shower tray. The shower tray is installed using any of
our Schluter® thin-set mortars or an unmodified thin-set mortar. A 1/4 inch x 3/8 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 to produce solid contact with the surface and then comb
additional mortar using the notched side of the trowel. Place the shower tray and solidly embed in
the mortar. Cardboard can be placed over the tray to protect
it. Next, we will install the KERDI-KERECK inside
corners and KERDI-BAND along the tray to wall connections. Completing this step now, will help us to
avoid working over the shower curb later on. Using the flat side of the trowel apply thin-set
mortar to the area where the KERDI-KERECK corners will be installed. Then comb additional mortar using the notched
side of the trowel. Embed the KERDI-KERECK using the flat side
of the trowel or a dry wall finishing knife. Repeat the process at the remaining inside
corners. Holding one side of the corner in place while
embedding the other side in the mortar helps keep corner installation simple and easy. Next we’ll use KERDI-BAND along the perimeter
of the shower tray. Measure and cut sections of KERDI-BAND so
that a 2 inch overlap is achieved at all junctions. A 2 inch overlap can be achieved at KERDI-KERECK
corners without continuing KERDI-BAND all the way to the corner of the shower. This will limit build-up of the membrane in
these areas and make setting small tiles easier. KERDI-BAND may be creased prior to installation
to help maintain tight corners and make subsequent tile setting as easy as possible. Using the flat side of the trowel apply thin-set
mortar to the area where the banding is to be installed. Then apply additional mortar using the notched
side. Embed the KERDI-BAND into the thin set mortar
using the flat side of the trowel or a drywall finishing knife. Repeat this process at all remaining joints
ensuring that the minimum two inch overlap is achieved at all transitions. The next step is to install the KERDI-DRAIN
bonding flange. Fill the step in the shower tray completely
with thin-set mortar and apply additional mortar up to the cutout in the subfloor. Press the KERDI-DRAIN firmly into the mortar
to ensure full support of the bonding flange and check for level. Using the flat side of the trowel apply 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. Clean the excess mortar from the step in the
bonding flange. Make sure this connection is secure. Next we’ll install the curb. The KERDI-BOARD-SC is installed using any
of our Schluter® thin-set mortars or an unmodified thin-set mortar similar to the KERDI-SHOWER
tray. Keep in mind that the curb can be easily cut
to size. Apply the mortar to the subfloor, edge of
the shower base, and walls. Press the curb firmly into place. Verify that the curb is level. Now that the curb is installed, we can complete
the remaining waterproofing connections with KERDI-KERECK and KERDI- BAND. The Schluter-Shower System is designed to
be flexible and meet the needs of the installer. Depending on project requirements and installer
preferences, the order of Schluter-KERDI waterproofing installation may vary from that demonstrated,
provided that all surfaces are covered and 2 inch overlaps are maintained at all seams. The waterproofing installation is now complete. If tile is to be set on floors adjacent to
the shower, consider the use of the Schluter-DITRA uncoupling and waterproofing membrane, which
can be sealed to the Schluter-Shower System to provide comprehensive waterproofing in
the bathroom. More information is available in the “DITRA
Connection to Shower Base Video”. A water test is recommended before setting
tile to verify a successful waterproofing installation. This evaluation may be required by building
code officials on some projects. Wait 24 hours after the membrane installation
is complete before water testing. This will allow for final set of the mortar
and will ensure waterproof performance of the assembly at seams and connections. Please refer to the How to Perform a Water
Test Video for this method and return to this video when that work is complete. Next we will install the grate assembly. The grate assembly is installed in conjunction
with the tile. Fill the step in the bonding flange with thin-set
mortar. Then we place the height adjustment collar
is placed inside the lateral adjustment ring Be sure to back-butter the underside of the
grate to help ensure full support. Press the assembly into the mortar and install
the surrounding tiles, ensuring full coverage. Position the grate to match the joint pattern
of the tile covering and press flush with the tile surface. Remove all excess setting material immediately. Schluter Profiles can be used to replace sealant
joints and finish tile edges in shower applications. The integrated Schluter-Shower-System eliminates
leaks, reduces efflorescence and mold growth in the system, and dramatically reduces installation
time to ensure success and make shower installation easier than ever.

5 thoughts on “Schluter®-KERDI-SHOWER-KIT

  1. Been using this system for over 10 years. Only had 3 failures. Each one was covered by schluter warranty and was all taken care of by schluter. Thank you for those times. I have all the confidence in your product…. I swear one day I will be working for y’all.

  2. Hi Schluter
    I fear that that hollow shower curb will fail. It seems too flimsy. Once someone steps on it repeatedly it will flex and crack the grout and maybe the tile and thin set and all hell will brake loose. Maybe a solid foam piece or add re-enforcement like pressure treated wood.

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