Installation Guide

24 INSTALLATION — Shower base with Schluter
®
-KERDI-DRAIN
Remove the clamping ring from the installed
drain and save the bolts. Align the bolt
pattern of the clamping ring with the adaptor
ring and punch the matching inserts through
the adaptor ring.
1
Apply a 1/4" - 3/8" (6 mm - 10 mm) bead
of KERDI-FIX to the installed drain flange.
Place the adaptor ring on the installed
drain, re-insert the bolts, and tighten evenly.
Make bolts finger-tight plus 1/4 turn;
over tightening may warp the ring and result
in leaks.
2
Slide the adaptor flange into the adaptor ring
and ensure full support under the adaptor
flange with mortar. The mortar bed is then
placed according to the instructions on
page 23.
3
Clamping Ring Drain Installed: If a clamping ring drain is installed, replace with KERDI-DRAIN or convert using the KERDI-DRAIN adaptor kit.
If necessary, cut the KERDI-BOARD-SC to length using a utility knife and KERDI-SHOWER-SC/-SR using a handsaw.
1
Apply unmodified thin-set mortar to the
floor and to the edge of the shower base
and walls using a 1/4" x 3/8" (6 mm x 10
mm) square- or U-notched trowel.
2
Press the curb or ramp firmly into place.
Check the underside of the curb or ramp
to ensure that full coverage and support
is achieved.
Schluter
®
-KERDI-BOARD-SC curb and Schluter
®
-KERDI-SHOWER-SC/-SR curb
or ramp
Waterproofing the shower base
The KERDI or KERDI-DS waterproofing membranes can be installed over the KERDI-SHOWER-ST tray immediately or over a mortar bed as soon as the
mortar bed can be walked upon using unmodified thin-set mortar. A pre-cut section of KERDI matching the dimensions of the tray is included with the KERDI-
SHOWER-ST for convenience. The thin-set mortar must be mixed to a fairly fluid consistency, but still able to hold a notch.
Apply unmodified thin-set mortar to the
bonding flange and surrounding shower base
with a 1/4" x 3/16" (6 mm x 5 mm) V-notched
trowel or the KERDI-TROWEL. Note: When
using the stainless steel drain, the membrane
is adhered to the bonding flange with KERDI-
FIX; clean the bonding flange prior to KERDI-
FIX application.
1
Embed KERDI or KERDI-DS in the bond
coat and work the membrane onto the
KERDI-DRAIN bonding flange and shower base
to ensure full coverage and remove air pockets.
The membrane is carried to the step in the
bonding flange (template provided) and to the
edges of the shower base.
2
When using KERDI-SHOWER-SC/-SR, repeat
the process to install the membrane over
the curb or ramp. Seams in the membrane
are constructed by overlapping the edges
by 2" (50 mm) or by abutting adjacent sheets
and installing KERDI-BAND centered over the
joint. Install KERDI-KERECK at all inside and
outside corners. When using KERDI-BOARD-
SC, seal the curb to the base and walls using
KERDI-KERECK and KERDI-BAND.
3
Note: Schluter
®
-KERDI-BOARD can be used to
build custom curbs.
Note: Schluter
®
-Systems recommends a leak test be performed on the connection between the drain
and the waste line prior to continuing with the remainder of the installation whenever possible.