Installation Guide
Grate: 
Place the height adjustment collar inside the 
lateral adjustment ring and snap the grate into 
place.  Note: For the 6" (150 mm) grates, the 
height adjustment collar is integrated with the 
grate. For the residential adaptor kit, there is no 
lateral adjustment ring.
1
Fill the step in the bonding flange with thin-set 
mortar and back-butter the underside of the 
grate to ensure full support. Place the assembly 
into the mortar and install the surrounding tiles, 
ensuring full coverage.
2
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. Note: Protect the visible surface of 
the grate from contact with setting and grouting 
materials. In particular, anodized aluminum is 
sensitive to alkaline materials.
3
Tileable Covering Support:
Fill the step in the bonding flange with  
thin-set mortar. Place the tile spacer in the lateral 
adjustment ring and press the assembly into the 
mortar. Install tiles up to the tile spacer, ensuring 
full coverage. Embed the tiles on the integrated 
tabs on the lateral adjustment ring, which provide 
for a flush transition to the covering support. 
Position the tile spacer to match the joint pattern 
of the tile covering. The tiles may be held back 
from the spacer as required to match the layout. 
Remove all excess setting material.
1
Apply tile to the top of the covering 
support using Schluter SET
®
, ALL-SET
®
,  
FAST-SET
®
, or unmodified thin-set mortar. 
The tile may overhang the covering support 
provided that a drainage opening of at least 3/16"  
(5 mm) is provided.
2
After the tile is set and grouted, remove the tile 
spacer and insert the tiled covering support into 
the lateral adjustment ring.
3
Grate assembly
Apply Schluter SET
®
, ALL-SET
®
, FAST-SET
®
, 
or unmodified thin-set mortar to the bonding 
flange and recess area in the tray with a 1/4" 
x 3/16" (6 mm x 5 mm) V-notched trowel or 
the KERDI-TROWEL. The thin-set mortar must 
be mixed to a fairly fluid consistency, but still 
able to hold a notch. Embed the KERDI collar 
membrane 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. 
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.
4
INSTALLATION — Shower base with Schluter
®
-KERDI-DRAIN 29










