Use and Care Manual

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SHOWER SYSTEM

12.1 Schluter

-KERDI-BOARD

Property Method Value

Water vapor permeance ASTM E96

0.36 perms - 1/2" (12.5 mm)

Thermal resistance (R-value) ASTM C518

R 9.1 – 2" (50 mm)

R 2.2 – 1/2" (12.5 mm)

R 0.9 – 3/16" (5 mm)

Service temperature range -58

°F to 158°F (-50°C to 70°C)

Flame spread/smoke developed ASTM E84 Pass

Thermal barrier evaluation NFPA 286 Pass

2,3

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.

KERDI-BOARD is suitable for: creating tile

substrates on masonry walls, wood or metal

framing, and other finished wall surfaces;

creating straight or curved partition walls;

creating straight or curved bathtub and shower

surrounds; concealing pipes and columns; as

well as creating bathtub platforms, vanities,

storage shelves, countertops, and various other

bathroom structures.

The boards are simply cut to size with a utility

knife. The gridlines, which are printed on the

surface, are helpful for neat and quick cuts

and installation. KERDI-BOARD can be fully

adhered in wall areas or spot-bonded with

thin-set mortar. If necessary, the material may

be secured with additional wall anchors. In the

case of stud framing, KERDI-BOARD is attached

with screws and washers from the matching

hardware system. Tiles can be installed directly

over KERDI-BOARD using the thin-set method.

L-shaped and U-shaped KERDI-BOARD panels

are available for creating pipe and column

coverings, and grooved panels are available for

creating curved elements. Schluter

-Systems

also offers profiles and attachment hardware for

wall connections and finishing edges, as well as

matching wall anchors and screws.

Material Properties and

Areas of Application

KERDI-BOARD is made from extruded

polystyrene foam, with a cement-free

reinforcement layer laminated to both sides and

an anchoring fleece webbing. The surface of the

board has gridlines consisting of 3/8" x 3/8" (10

x 10 mm) squares printed on one side.

KERDI-BOARD is waterproof and vapor

retardant and can withstand all chemical

stresses that typically occur in conjunction with

ceramic tile coverings. KERDI-BOARD may be

used in bonded waterproofing assemblies where

required. KERDI-BOARD is completely flat and

will not warp, even with one-sided exposure to

temperature and moisture fluctuations. It will not

rot or decay. KERDI-BOARD can be used in a

multitude of different application areas. In special

cases, the suitability of the material must be

verified based on the anticipated chemical and

mechanical stresses. The information provided

below is intended as general guidelines.

Structures on which KERDI-BOARD is to be

installed must be stable and meet any other

project-specific requirements. Select a suitable

material thickness if using KERDI-BOARD

for the construction of freestanding partition

walls, shelving, or similar structures, and use

reinforcement profiles as necessary. Arrange

supports made of KERDI-BOARD at regular

intervals consistent with conventional building

practices. Select the material thickness and

installation method depending on the evenness

of the substrate. KERDI-BOARD can be spot-

bonded to walls to correct substrate variations

or fully embedded in thin-set mortar where walls

are sufficiently even and plumb.

Maintenance

Storage

KERDI-BOARD should be stored flat. In case of

outdoor storage, protect the material from direct

sunlight and weather exposure.

Shower Drains

Conventional two-stage drains are designed to

connect to shower pan liners below the mortar

bed and do not allow a secure, watertight

connection to bonded waterproof membranes at

the top of the drain assembly. KERDI-DRAIN and

KERDI-LINE are designed specifically to ensure

a simple and secure connection to bonded

waterproof membranes, such as KERDI, at the

top of the assembly rather than below it, thereby

reducing the risk of leakage, efflorescence, and

mold growth.

Application and Function

8.2 Schluter

-KERDI-DRAIN is a floor

drain specifically designed to allow connections

to KERDI or other load-bearing, bonded

waterproof membranes. The membrane is

adhered to the large integrated bonding flange

to form a waterproof connection at the top of

the drain assembly. KERDI-DRAIN consists of a

drain casing and fully adjustable grate assembly

or covering support to which tile is applied.

The grate assembly accommodates a wide

range of tile thicknesses and allows lateral and

tilt adjustment as well. The covering support is

placed flush with the top of the bonding flange

and can therefore accommodate any thickness

tile covering.

The standard KERDI-DRAIN is attached directly

to the waste line. The drain casing is available in

ABS, PVC, or stainless steel. The plastic drain

casings feature a fleece-covered bonding flange.

They are available with standard 2" (50 mm) and 3"

(75 mm) outlets and attached to the pipe

using an appropriate solvent cement. The

stainless steel drain casings are available with

standard 2" (50 mm) or 3" (75 mm) no-hub

outlets or 2" (50 mm) threaded outlet. The

no-hub outlets are attached to the pipe using an

appropriate mechanical (e.g., flexible or no-hub)

coupling. The threaded outlets are attached

to the pipe using thread sealing compound or

tape. The simple connection to standard drain

outlets makes KERDI-DRAIN suitable for new

construction and renovation.

The KERDI-DRAIN adaptor kit is designed to

convert clamping ring drains by equipping them

with an integrated bonding flange. The adaptor

kit includes a stainless steel adaptor ring with

an over-molded rubber gasket and a variety of

perforated hole patterns that align with most

common clamping ring shower drains. The

adaptor ring replaces the clamping ring and is

attached to the drain body using the clamping

ring bolts. This connection is made watertight

via the rubber gasket and KERDI-FIX adhesive/

sealant. The integrated bonding flange slides into

the adaptor ring, with the over-molded rubber

gasket ensuring a watertight seal. KERDI-DRAIN

8.2 Schluter

-KERDI-DRAIN

Schluter

-KERDI-DRAIN-H

8.7 Schluter

-KERDI-LINE

Using the desiccant method at 100°F (38°C) and 90% RH

Per International Building Code Requirements

Porcelain tile used as thermal barrier over 1/2" (12.5 mm) -thick KERDI-BOARD on wood framing