Use and Care Guide

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SHOWER SYSTEM

Schluter

-KERDI-BOARD-KIT combines all

of the necessary components to waterproof

the walls of your bathtub and acrylic shower

base using waterproof building panels. The

kit includes ½" x 48" x 38" (1.25 cm x 122

cm x 97 cm) KERDI-BOARD waterproofing

panels, KERDI-BAND, pipe and mixing valve

seals, screws and washers, plus 290 ml of

KERDI-FIX sealant in bright white. The KERDI-

BOARD-KIT provides enough KERDI-BOARD

to cover up to 101 ft² (9.4 m²) of wall area.

Material Properties and

Areas of Application

SHOWER-T/-TS/-TT/-LT/-LTS/-SR

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 have a density of 3.75 lb/ft

(60 kg/m

)

and the shower ramp, 4.0 lbs/ft

, all with a 48

psi (331 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/-SR 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 polyproplyene

on both sides. KERDI-DS features a high-

density polyethylene (HDPE) core with non-

woven polyproplyene 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.

8.1 Schluter

-KERDI