Use and Care Guide
5
FLOOR DRAINS
5
5 mm) V-notched trowel or the DITRA-
TROWEL, which features an 11/64" x 
11/64"  (4.5 x 4.5 mm) square-notched 
design. Solidly embed the matting into the 
bond coat using a float, screed trowel, or 
DITRA-ROLLER.
2.   Apply Schluter SET
®
, Schluter ALL-SET
®
, 
Schluter FAST-SET
®
 or unmodified thin-
set mortar to the membrane surrounding 
KERDI-LINE with a 1/4" x 3/16" (6 x 5 mm) 
V-notched trowel or the KERDI-TROWEL, 
which features a 1/8" x 1/8" (3 x 3 mm) 
square-notched design. Embed the KERDI 
collar in the bond coat to ensure full 
coverage and remove air pockets.
Grate assembly
Grate
1.   Apply Schluter SET
®
, Schluter ALL-SET
®
, 
Schluter FAST-SET
®
 or unmodified thin-set 
mortar to the underside of the grate frame 
and place it in the channel body ensuring 
full coverage and support of the frame.  
Insert the foam spacers in the grate frame 
to reinforce it during the remainder of the 
installation.
 Note: The tape on the grate frame does 
not need to be removed. It is intended 
to help keep setting material out of the 
channel body during installation.
2.   Slide the plastic height adjustment spacers 
with threaded bolts onto the tabs along 
the inside of the grate frame to adjust the 
elevation of the frame. The spacers may 
be adjusted simply by turning the bolts by 
hand. The elevation should be set such 
that the frame will be flush with the surface 
of the tile covering.
3.   Apply Schluter SET
®
, Schluter ALL-SET
®
, 
Schluter FAST-SET
®
 or unmodified thin-
set mortar to the substrate and install the 
tiles, ensuring full coverage. Once the tile 
covering is set and grouted, remove the 
spacers from the grate frame and insert the 
grate.
   Note: Protect the visible surfaces of the 
grate frame and grate from contact with 
setting and grouting materials. Setting 
and grouting materials must be removed 
immediately.
KERDI-LINE-FC
1.   Install KERDI-LINE channel bodies end-
to-end and overlap the KERDI collars 
using Schluter SET
®
, Schluter ALL-SET
®
, 
Schluter FAST-SET
®
 or unmodified thin-set 
mortar to ensure a waterproof connection. 
KERDI-LINE-FC is subsequently installed 
in conjunction with the KERDI-LINE grate 
assembly and adjacent tiles. 
 Note: KERDI-LINE-FC may be used with 
tiles that are 1/4" (6 mm) thick or greater.
2.   Apply a sufficient amount of thin-set mortar 
to the substrate and/or the back of KERDI-
LINE-FC and press the profile into the 
mortar until its surface is flush with the 
adjacent tile and grate assembly. 
3.   Leave a space of approximately 1/16" – 
1/8" (1.5 – 3 mm).
4.   Fill the joints completely with grout or 
setting material. 
Tileable Covering Support
Wall Installation
1. Peel protective foil off the cover strip and 
adhere the strip to the bonding flange 
adjacent to the wall(s). Position the strip 
along the edge of the channel. The cover 
strip hides and protects the KERDI surface 
under the tile.
2.   Insert the tile spacers into the channel body. 
Install the surrounding tile on the adjoining 
walls and mortar bed up to the spacers 
using Schluter SET
®
, Schluter ALL-SET
®
, 
Schluter FAST-SET
®
 or unmodified thin-set 
mortar, ensuring full coverage. Remove all 
excess setting material.
3.   Apply tile to the top of the covering support 
using Schluter SET
®
, Schluter ALL-SET
®
, 
Schluter FAST-SET
®
 or unmodified thin-
set mortar. The tile is installed flush with 
the front side of the covering support 
to provide the drainage opening and 
overhanging the back side of the covering 
support to cover the bonding flange along 
the wall. Measure and cut the tile such that 
an approximate 1/16" (1 mm) gap is left 
at the wall. When the ends of the channel 
body are located adjacent to walls, the 
tile is installed overhanging the end of the 
plate to cover the bonding flange along the 
walls. Measure and cut the tile such that an 
approximate 1/16" (1 mm) gap is left at the 
walls.
   Note: When the mortar bed is tiled beyond 
the ends of the channel, the tile on the 
ends of the covering support can be cut 
to either match the grout joints of the 
surrounding floor covering or to provide a 
perimeter drainage opening.
Intermediate Installation
1.   When the ends of the channel body are 
located adjacent to walls, peel protective 
foil off the cover strip and adhere the strip 
to the bonding flange adjacent to the walls. 
Position the strip along the edge of the 
channel. The cover strip hides and protects 
the KERDI surface under the tile. When the 
mortar bed will be tiled beyond the ends of 
the channel, the cover strip is not required.
2.   Insert the tile spacers into the channel 
body. Install the surrounding tile on the 
adjoining walls (if applicable) and mortar 
bed up to the spacers using Schluter SET
®
, 
Schluter ALL-SET
®
, Schluter FAST-SET
®
or unmodified thin-set mortar, ensuring 
full coverage. Remove all excess setting 
material.
3.   Apply tile to the top of the covering support 
using thin-set mortar. The tile is installed 
flush with the front and back of the covering 
support to provide the drainage openings.   
When the ends of the channel body are 
located adjacent to walls, the tile is installed 
overhanging the end of the plate to cover 
the bonding flange along the wall. Measure 
and cut the tile such that an approximate 
1/16" (1 mm) gap is left at the wall.
   Note: When the mortar bed is tiled beyond 
the ends of the channel, the tile on the 
ends of the covering support can be cut 
to either match the grout joints of the 
surrounding floor covering or to provide 
perimeter drainage openings.
   Note: For acid-resistant coverings, use an 
epoxy adhesive to set and grout the tile.
Maintenance
KERDI-DRAIN and KERDI-LINE require no 
special maintenance and are resistant to mold 
and fungi. The grate may be removed to clean 
the drain housing and the drain pipes.
Clean the grates and profiles using neutral 
cleaners. Avoid the use of strong acids (e.g., 
hydrochloric, hydrofluoric) and bases/alkaline 
cleaners (e.g., bleach, ammonia, chlorides).  
Do not use abrasive cleaning agents and tools.  
Even stainless steel requires periodic cleaning, 
which will maintain a neat appearance and 
reduce the risk of corrosion. Stainless steel 
surfaces develop a sheen when treated with a 
chrome-polishing agent.










