Use and Care Guide

ManualsBrandsSchluter Systems ManualsTile Edge TrimKerdi-Board 0.75-in W x 2-in L Steel Tile Edge Trim

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 mm 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 interior applications. 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 free-

standing 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.

KERDI-BOARD should be stored flat. In case

of outdoor storage, protect the material from

direct sunlight and weather exposure.

Installation

Fully embedded KERDI-BOARD

Any board thickness suitable

1. Remove all surface contaminants from

the substrate that may weaken the bond.

2. Apply thin-set mortar to the substrate

and/or onto KERDI-BOARD with

a notched trowel. The mortar must

bond to the substrate and mechanically

anchor the fleece on the KERDI-BOARD

surface.

3. Apply the panels to the wall and firmly

press them in place to ensure full

coverage.

4. Tightly abut the individual panels and

align them appropriately.

5. The tiles can be installed immediately

using Schluter SET™, Schluter ALL-

SET™, Schluter FAST-SET™ or

unmodified thin-set mortar. Choose a

notched trowel to match the tile format,

and back-butter the tiles, if necessary,

to attain full coverage.

Note: If the bond between the thin-set

mortar and substrate is questionable,

additional mechanical attachment

with the KERDI-BOARD-ZSD anchors

or KERDI-BOARD-ZT washers and

corresponding screws is required.

Fasteners are installed after the thin-set

mortar has hardened.

Note: See section “Waterproofing” on

the use of KERDI-BOARD in bonded

waterproofing assemblies.

Spot-bonded KERDI-BOARD

Minimum board thickness = 3/8" (9 mm)

1. Remove all surface contaminants from

the substrate that may weaken the

bond.

2. Place spots of thin-set mortar on the

KERDI-BOARD panel or substrate

in intervals of approx. 12" (30 cm).

The mortar must bond to the substrate

and mechanically anchor the fleece on

the KERDI-BOARD surface.

3. Apply the panels to the wall, firmly press

them in place, and align them with a

straight-edge or level.

4. The tiles can be installed immediately

using Schluter SET™, Schluter ALL-

SET™, Schluter FAST-SET™ or

unmodified thin-set mortar. Choose a

notched trowel to match the tile format,

and back-butter the tiles, if necessary,

to attain full coverage.

Note: If the bond between the thin-set

mortar and substrate is questionable,

additional mechanical attachment

with the KERDI-BOARD-ZSD anchors

or KERDI-BOARD-ZT washers and

corresponding screws is required.

Fastener locations must coincide with

mortar spots. This may be ensured by

making holes in the KERDI-BOARD at

the desired fastener locations prior to

applying mortar spots. Fasteners are

installed after the thin-set mortar has

hardened.

Note: See section “Waterproofing” on

the use of KERDI-BOARD in bonded

waterproofing assemblies.

Use of KERDI-BOARD on wood or

metal framing

Minimum board thickness = 1/2" (12.5 mm)

for studs spaced at 16" (40.6 cm) o.c.;

3/4" (19 mm) for studs spaced at

24" (61.0 cm) o.c.

1. KERDI-BOARD can be mounted

vertically or horizontally on wood or

metal framing with appropriate screws

(i.e., coarse thread wood screw for

wood studs and self-tapping for metal

studs) and corresponding KERDI-

BOARD-ZT washers.

2. The selected screws must be of

sufficient length to reach a depth of at

least 3/4" (20 mm) in wood studs and at

least 3/8" (10 mm) in metal studs. The

maximum allowable on-center fastener

spacing is 12" (30 cm) for walls and 6"

(15 cm) for ceilings. Screws may be

placed between adjacent panels such

that the washers fasten both panel

edges.

3. The tiles can be installed immediately

using Schluter SET™, Schluter ALL-

SET™, Schluter FAST-SET™ or

unmodified thin-set mortar. Choose a

notched trowel to match the tile format,

and back-butter the tiles, if necessary,

to attain full coverage.

Schluter

-KERDI-BOARD

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

Per International Building Code Requirements, contact Schluter

-Systems for more information

Specific building categories, contact Schluter

-Systems for more information

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

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

CAN/ULC S102.2

Pass

Thermal barrier evaluation NFPA 286 Pass

2,4