Tiled showers and bathtub surrounds require proper moisture management to ensure successful long-term performance. KERDI-BOARD is light-weight, easy to cut, inherently waterproof and vapor-retardant, thus greatly reducing the prep work required to create an ideal substrate for the application of tiles in wet areas.

Multifunctional tile substrate

- Waterproof and vapor-retardant

- Thermally insulating, reduces heat loss

- Dimensionally stable

Simplifies tile installation

- Lightweight, easy-to-handle and transport

- Easy-to-cut and dust-free

- Printed gridlines for precise cutting

- Quick and easy to install

Typical Applications

KERDI-BOARD

KERDI-BAND

KERDI-DRAIN Corners

Pipe and mixing valve seals

KERDI Shower Tray or mortar base

KERDI Shower Curb or built-up curb

KERDI-BOARD

KERDI-BAND

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Lightweight, waterproof tile backer for showers and bathtub surrounds.Schluter®-KERDI-BOARD

Material properties:KERDI-BOARD consists of an extruded polystyrene foam panel, with a special reinforcement facer on both sides and fleece webbing for effective anchoring in thin-set mortar.

Application:The 1/2" thick (12.5 mm) KERDI-BOARD can be applied over existing gypsum or masonry walls, wood stud framing, and other finished wall surfaces for bathtub and shower surrounds.

Requirements:Structures on which KERDI-BOARD is to be installed must be stable and meet local building code and any other project-specific requirements.

IMPORTANT: The maximum allowable stud spacing for the application of KERDI-BOARD is 16" (40 cm). Stud spacing exceeding 16" will require the placement of additional studs to meet this requirement.

Showers with KERDI tray or mortar base Bathtub surrounds

3a

3b

3a

3b

www.kerdi-board.com

Schluter Systems L.P. • 194 Pleasant Ridge Road, Plattsburgh, NY 12901-5841 • Tel.: 1-800-472-4588 Fax: 1-800-477-9783

Schluter Systems (Canada) • 21100 Chemin Ste-Marie, Ste-Anne-de-Bellevue, QC, H9X 3Y8 • Tel.: 1-800-667-8746 Fax: 1-877-667-2410 Item

#: 5

5360

0

InstallationThe following instructions include the steps necessary to install KERDI-BOARD over wood framing within a bonded waterproofing assembly.

Applying KERDI-BOARD over wood stud framing

KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set.

IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs.

Abut the individual panels over the center of the studs or other solid backing. Screws may be placed between adjacent panels such that the washers fasten both panel edges.

The maximum allowable on-center spacing for fasteners:

Vertical: 12" (30 cm)

Horizontal: 16" (40 cm)

1 2 3

Tools and materials• 1/2" KERDI-BOARD

32" x 48" (81 cm x 122 cm) 64" x 48" (162.5 cm x 122 cm) 96" x 48" (244 cm x 122 cm)

• KERDI-BOARD screw and anchor set (40 units each)

• KERDI-BAND

• Utility knife

• Level

• Power drill and mixing paddle

• Trowel to set the tiles (See store associate on trowel size appropriate to set your tile)

• Margin trowel

• KERDI-FIX or equivalent sealant

1 Unmodified thin-set mortar

All KERDI components and tiles must be installed using an unmodified thin-set mortar meeting ANSI A118.1 (no premixed mortar).

• Not intended for exterior applications • Not intended for floor applications• 1/2" (12.5 mm) thick KERDI-BOARD not suitable for use as support for partition walls, shower benches, etc.

• Certain glass tiles, moisture-sensitive stones, e.g., green marble, or resin-backed tiles may not be compatible with the KERDI system or may require special setting materials. Consult tile manufacturer and Schluter Systems for more information.

• If installing bathroom fixtures such as grab bars in showers, or other heavy objects, the fixtures must be anchored in the structure or solid blocking behind KERDI-BOARD.

Joints, corners, and fastener penetrations must be sealed with KERDI-BAND using unmodified thin-set mortar1. The KERDI-BAND must overlap panel joints and fastener penetrations by at least 2" (5 cm).

4

Max. 16"

Max. 12"

Shower base

Floor/wall connections must be sealed with KERDI-BAND using unmodified thin-set mortar1. The BAND must overlap joints by at least 2" (50 mm).

Bathtub surround

Construct tub/wall connections by placing painter’s tape along the tub deck and leaving a 1/4" (6 mm)-wide gap between KERDI-BOARD and tub. Apply unmodified thin-set mortar1 to the KERDI-BOARD and completely fill the 1/4" (6 mm)-wide gap with KERDI-FIX or an equivalent sealant.

Shower niches

Use KERDI-BOARD to create a niche, ensuring that all corners and joints are sealed with KERDI-BAND using unmodified thin-set mortar1.

Mixing valve and pipe protrusions

Install KERDI-SEAL-PS at the shower head and body sprays, etc, and KERDI-SEAL-MV at the mixing valve. As an alternative, KERDI-FIX or an equivalent sealant can be used to seal pipe protrusions.

Solidly embed KERDI-BAND in the unmodified thin-set mortar1 and KERDI-FIX (or equivalent sealant).

Repeat the same procedure for vertical tub/wall connections.

Max. 16"

2" 2"

2"

Limitations

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For complete installation instructions, please refer to the Schluter

KERDI-BOARD Data Sheet. For comprehensive details and installation instructions regarding Schluter-Shower System applications, including showers, steam showers, and bathtub surrounds, please refer to the Schluter-Shower System Installation Handbook. The data sheet and handbook are available on our website at schluter.com.

www.kerdi-board.com

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