Shower Installation Guide

INSTALLATION — Shower Assembly with Prefabricated Tray and Curb 13
a
10
If there is access to the plumbing from below
and the waste line can be connected after
installing the KERDI-DRAIN, apply unmodified
thin-set mortar to the entire shower tray surface
and completely fill the step in the shower tray.
9
a) The KERDI-DRAIN is pressed firmly into the thin-set mortar, ensuring full support of the bonding
flange. b) When KERDI-DRAIN must be set by the plumber prior to the KERDI-SHOWER-ST tray (or
when there is no access to the plumbing from below), the KERDI-DRAIN is connected to the waste line
and set to the appropriate height using the detachable center section (1) of the tray or the foam spacers
(2) included with the drain. Before installing the KERDI-SHOWER-ST tray, apply thin-set mortar to the
substrate and to the top and bottom of the detached center section. Slide the center section into place
below the drain to ensure solid and uniform support of the bonding flange.
Note: Schluter
®
-Systems recommends installing the KERDI-SHOWER-ST tray prior to setting KERDI-
DRAIN whenever possible. This allows greater control over the final position of the drain and makes it
easier to obtain full support under the bonding flange.
10
When using the ABS or PVC drain, apply
additional unmodified thin-set mortar to the
top of the fleece-laminated bonding flange.
When using the stainless steel drain, KERDI
is adhered to the bonding flange with the
KERDI-FIX adhesive/sealant. The stainless steel
bonding flange must be clean and free of
grease or other contaminants prior to KERDI-
FIX application.
11
Embed the KERDI waterproofing membrane
into the mortar and work the matting onto
the entire surface of the tray to ensure proper
adhesion and to remove air pockets. Be sure
the connection between the KERDI and KERDI-
DRAIN is secure.
12
If necessary, cut the KERDI-SHOWER-SC curb
to length using a handsaw. Apply unmodified
thin-set mortar to the floor and to the edge of
the shower tray and walls using a 1/4" x 3/8"
(6 mm x 10 mm) square- or U-notched trowel,
and press the curb firmly into place. Check
the underside of the curb to ensure that full
coverage and support is achieved.
13
Use KERDI-KERECK-F pre-formed inside and
outside corners to seal the shower curb and/
or bench to the walls and tray. The curb/tray
and the bench/tray junctions are sealed using
KERDI-BAND. Cover the curb and bench with
KERDI.
14 15
The KERDI waterproofing application is now
complete. Prior to setting tile, wait 24 hours
minimum before water testing to allow for final
set of thin-set mortar and ensure waterproof
performance at seams and connections.
Before and during tile installation, the tray and
KERDI must be protected in a suitable manner
(e.g., cardboard can be laid over the floor to
protect against mechanical damage). Using
a trowel that is appropriate for the size of the
tile, apply unmodified thin-set mortar directly to
the exposed KERDI surface and install the tiles,
ensuring full coverage.
16
The grate assembly is installed in conjunction
with the tile. Place the height adjustment collar
inside the lateral adjustment ring and snap the
grate into place. Fill the step in the bonding
flange with thin-set mortar and back-butter the
underside of the grate to ensure full support.
Press the assembly into the mortar and install
the surrounding tiles. Position the grate to
match the joint pattern of the tile covering and
press flush with the tile surface.
Note: Protect the visible surface of the
grate from contact with setting and grouting
materials. In particular, anodized aluminum is
sensitive to alkaline materials.
Detachable center section
(1)
Foam spacer
(2)
b
10