Use and Care Manual

3
SHOWER SYSTEM
provides enough KERDI-BOARD to cover up to
101 ft² (9.4 m²) of wall area.
Material Properties and
Areas of Application
KERDI-SHOWER-T/-TS/-TT/-LT/-LTS/-R
prefabricated substrates are manufactured using
lightweight expanded polystyrene. The products
require no special disposal and can be recycled.
No CFCs or HCFCs are present in either the
products or in the manufacturing process. The
polystyrene foam trays and the shower ramp
each have a density of 3.75 lb/ft
3
(60 kg/m
3
) with
an 80 PSI (552 kPa) compressive strength at 10%
deformation. It is serviceable in temperatures up
to 175ºF (79ºC). The expanded polystyrene
used to manufacture KERDI-SHOWER-T/-TS/-
TT/-LT/-LTS/-R is treated with a flame retarding
agent. Expanded polystyrene should not be
exposed to hydrocarbons, esters, amines, and
aldehydes. All will deteriorate foam. Exposure to
ultraviolet rays (sunlight) for long periods of time
will result in partial degradation (dusting) at the
surface.
KERDI-BOARD-SB/-SC prefabricated substrates
are manufactured using KERDI-BOARD, made
from extruded polystyrene foam, with a cement-
free reinforcement layer laminated to both sides
with an anchoring fleece webbing. The surface
features printed gridlines consisting of 3/8" x 3/8"
(10 x 10 mm) squares for precise cutting. KERDI-
BOARD is waterproof and vapor-retardant and
can withstand all chemical stresses that typically
occur in conjunction with ceramic tile coverings.
KERDI-BOARD will not warp, rot, or decay. It is
serviceable in temperatures up to 158°F (70 °C).
Waterproofing Membrane
Since traditional shower pan liners are placed
below the mortar setting bed in conventional
assemblies, moisture is allowed to saturate
the mortar bed. This can increase the risk
of leakage, cause efflorescence, and foster
mold growth. Bonded waterproof membranes,
such as KERDI, are set on top of the mortar
bed and protect it from becoming saturated,
thus eliminating the problems associated with
traditional systems.
Application and Function
8.1 Schluter
®
-KERDI is a pliable, sheet-applied,
bonded waterproof membrane and vapor
retarder with limited crack-bridging capabilities.
It is made of soft polyethylene, which is covered
on both sides with a special fleece webbing to
anchor the membrane in the thin-set mortar.
Tiles can be installed directly on the KERDI
membrane using the thin-bed method. Other
trowel-applied covering materials, such as
plaster, can also be used. Schluter
®
-KERDI-DS
is a bonded waterproof membrane and vapor
retarder with very low water vapor permeance
for use in continuous use steam rooms and
similar applications.
Various KERDI waterproofing accessories are
available. Preformed, seamless corners include
the following. KERDI-KERECK-F are used to seal
90° inside and outside corners. KERDI-KERS-B
are used to seal 135° corners at triangular
shower benches and neo-angle shower curbs.
KERDI-KERS are used to seal floor/wall/
shower base connections in curbless shower
applications where the KERDI-LINE linear drain
is installed adjacent to the wall. KERDI-SEAL-
PS/-MV are prefabricated sections of KERDI
with overmolded rubber gaskets that are used
to seal pipe protrusions through the KERDI
waterproofing membrane (e.g., at showerheads
and tub spouts) and protect moisture-sensitive
backing panels at the mixing valve. Use KERDI-
BAND, in widths of 5" (12.5 cm), 7-1/4" (18.5
cm), or 10" (25 cm), to seal butt joints or corner
joints. KERDI-FLEX, in 5" (12.5 cm) or 10" (25
cm) widths, is used to seal expansion joints or
flexible edge joints.
Material Properties and
Areas of Application
KERDI features a modified polyethylene (PEVA)
core with non-woven polypropylene on both
sides. KERDI-DS features a high-density
polyethylene (HDPE) core with non-woven
polypropylene on both sides. KERDI is 8-mil
thick and has a water vapor permeance of 0.90
perms, when tested according to ASTM E96,
using Procedure E at 90% relative humidity.
KERDI-DS is 20-mil thick and features additives
to produce a water vapor permeance of 0.18
perms.
KERDI and KERDI-DS are waterproof
and resistant to most chemicals commonly
encountered in tiled environments. They are
resistant to aging and will not rot. KERDI
and KERDI-DS are highly resistant to saline
solutions, acid and alkaline solutions, many
organic solvents, alcohols, and oils. Information
regarding their resistance to specific substances
can be provided if concentration, temperature,
and duration of exposure are known. For acid-
resistant coverings, use an epoxy adhesive to set
and grout the tile.
KERDI and KERDI-DS are used on wall and
floor surfaces where protection against the
penetration of moisture or other harmful
substances is necessary. KERDI is suitable for
showers, intermittent use steam showers, tub
surrounds, and areas surrounding swimming
pools. Industrial applications include the food
industry, breweries, and dairies. KERDI-DS
is suitable for use in continuous use steam
rooms and other applications with similar vapor
management requirements.
KERDI and KERDI-DS meet the American
National Standard for Load Bearing, Bonded,
Waterproof Membranes for Thin- Set Ceramic
Tile and Dimension Stone Installations
(ANSI A118.10). The membranes are listed
by cUPC® and evaluated by ICC-ES (Report
Nos. ESR-2467 and PMG-1204). For
copies of these documents, please contact
Schluter
®
- Systems at 800-472-4588 (USA) or
800- 667-8746 (Canada) or by e-mail at info@
schluter.com. Links to the documents can also
be accessed at www.schluter.com.
KERDI and KERDI-DS have been evaluated
according to the "Standard Method for the
Testing and Evaluation of Volatile Organic
Chemical Emissions from Indoor Sources Using
Environmental Chambers, Version 1.1" for
California Specification 01350 and found to
comply with the VOC requirements. California
Specification 01350 is referenced by various
green building standards and rating systems.
Waterproof Building Panel
The KERDI-BOARD waterproof building panel
simplifies shower installation by combining the
tile backing and waterproofing installation into
a single step. KERDI-BOARD gives tile setters
more control over their projects by providing
them with the means to simply and easily create
ideal substrates for tile. Unsuitable substrates
can be remedied and new substrates can be
created while keeping the requirements of the
tile covering in mind.
Application and Function
12.1 Schluter
®
-KERDI-BOARD is a
multifunctional tile substrate and building panel,
which can also be used for creating bonded
waterproofing assemblies with tile coverings. It
consists of an extruded polystyrene foam panel,
with a special reinforcement material on both
sides and fleece webbing for effective anchoring
in thin-set mortar.
With the available panel thicknesses of 3/16",
3/8", 1/2", 5/8", 3/4", 1", 1-1/2", and 2"
(5, 9, 12.5, 15, 19, 25, 38, and 50 mm),
KERDI-BOARD covers a broad range of
application areas for creating flat, level, plumb,
square, and dimensionally stable substrates
for the installation of ceramic and natural stone
tiles. With suitable preparation of the abutting
seams and joint areas, the panel may be used
for bonded waterproofing assemblies.
8.1 Schluter
®
-KERDI
12.1 Schluter
®
-KERDI-BOARD