Schlüter-Systems - Schlüter®-KERDI-BOARD (2023)

Areas of Application and Installation

Installation: Fully embedded Schlüter®-KERDI-BOARD

1. The adhesive must bond with the substrate and mechanically set in the anchoring fleece of Schlüter®-KERDI-BOARD. Standard dry set adhesives as defined by EN 12004 are suitable for most substrates; otherwise select another suitable adhesive, carefully checking for any incompatibilities of materials.
2. The thin-bed adhesive is applied either over the substrate or onto Schlüter®-KERDI-BOARD with a notched trowel.
3. The anchoring fleece of the Schlüter®-KERDI-BOARD panels are fully embedded in the adhesive bed. Observe the curing times of all materials.
4. Tightly abut the individual panels and align them appropriately.
5. The tiles can be installed immediately after adhering the Schlüter®-KERDI-BOARD panels, using a dry setting adhesive that meets the requirements of the covering. Choose a notched trowel to match the tile format. The curing times of the thin bed adhesive must be observed.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Attachment of Schlüter®-KERDI-BOARD with dabs of adhesive

1. Place dabs of adhesive on the Schlüter®-KERDI-BOARD panel at intervals of approx. 30 cm and ensure that all board edges are fully supported with adhesive. Depending on the required thickness of the layer, use a suitable bonding adhesive.
2. Set the panels at the wall, firmly press them in place and align them with the use of a spirit level.
3. The tiles can be installed immediately after adhering the Schlüter®-KERDI-BOARD panel, using a thin-bed adhesive that meets the requirements of the covering. Choose a notched trowel to match the tile format. The curing times of the thin-bed adhesive must be observed.

Note: If no lasting adhesion can be created between the dabs of adhesive and the substrate, additional mechanical attachment with the corresponding wall anchors or screws is required.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Use of Schlüter®-KERDI-BOARD on stud frame structures

1. Schlüter®-KERDI-BOARD can be installed and screw-mounted vertically or horizontally on professionally constructed stud frames. If using the system fixings, the panels may be tightly abutted when fixing the screws. The selected screws should be of sufficient length to reach a depth of at least 20 mm in wooden studs and at least 10 mm in metal studs. The distance between the screws should not exceed 25 cm. Depending on the project requirements, the panel thickness for installation on stud frame structures (centre line 62.5 cm) should be at least 19 mm.
2. In the case of vertical installation, abut the individual panels over the centre of the studs and insert additional noggins if required to support the board. In the case of horizontal installation, ideally ensure that all board joints are either supported by a stud or nogging. However seal all vertical joints that are not located over a stud with tile adhesive, Schlüter®-KERDI-FIX or the double sided adhesive tape Schlüter®-KERDI-BOARD-ZDK, if suitable for the installation. Such abutting joints should be offset.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Use of Schlüter®-KERDI-BOARD in partition wall systems

1. Schlüter®-KERDI-BOARD is adhered to the permanent wall with the abutting edge to make sure that the tile covering to be installed on the permanent wall includes the Schlüter®-KERDI-BOARD partition wall. If possible, the partition wall should be stabilised between Schlüter®-KERDI-BOARD panels adhered to the permanent wall. As an alternative, you can also screw-mount a matching angle or U-shaped profile on the permanent wall for the attachment of the partition wall.
2. Open ended partition walls can be further stabilised with the U-shaped components of the attachment hardware. If you plan to screw fittings to the U-shaped profile, adhere the matching flat plastic profile Schlüter®- KERDI-BOARD-ZFP to the back of the U-shaped profile to improve the fixing of the screws. U-shaped profiles may also be used for connections in the wall and ceiling area.
3. All vertical and horizontal joints of Schlüter®-KERDI-BOARD panels must be sealed with thin-bed adhesive or Schlüter®-KERDI-FIX, if applicable. In the case of partition walls, a matching angle or U-shaped profile may be included in one or several abutting joints for improved stability.
4. Depending on the individual construction site requirements, such partition walls are considered lightweight walls without structural analysis. As a rule, use the 50 mm panels for this kind of structure. Panels from a thickness of 19 mm may be used for building shelving. Again, this must be evaluated in accordance with the building specifications.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Panel coverings made of Schlüter®-KERDI-BOARD

1. The angle and U-shaped components of the Schlüter®-KERDI-BOARD attachment hardware allow for quick and easy panelling of piping and electrical installations.
2. The components with V-shaped grooves are supplied flat and can easily be cut to the required size. As an alternative, you can also cut a single U-shaped component into two angled elements with shorter legs.
3. The components are folded for installation, with a prepared adhesive strip holding them together in a V-shaped groove.
4. Adhere the edges of Schlüter®-KERDI-BOARD U-shaped or angled components to the existing walls, using either thin-bed adhesive or Schlüter®-KERDI-FIX. If required, mount the angle profile Schlüter®-KERDI-BOARD-ZW on the wall area first to attach the panel.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Curved wall areas made of Schlüter®-KERDI-BOARD

1. The grooved version of the Schlüter®-KERDI-BOARD panel is designed for creating rounded and curved structures.
2. First, cut the grooved panels to the required size. If a larger expanse of panels is required, several panels can be connected along the edges with double sided adhesive tape.
3. If the grooved surface points toward the inside, it is recommended to fill the grooves with tile adhesive prior to installation.
4. Exterior grooves should be filled with thin-bed adhesive prior to or during the tile installation.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Use of Schlüter®-KERDI-BOARD in floor areas

1. Schlüter®-KERDI-BOARD is equally suitable for creating level substrates in floor renovation projects, for example in bathroom installations. To install Schlüter®-KERDI-BOARD in 5, 9, 12.5 and 19 mm thicknesses the substrate must be level, ready to bear weight and free of all substances that may weaken the bond. Any levelling must be completed prior to installing Schlüter®-KERDI-BOARD.
2. The adhesive must bond well with the substrate and mechanically set in the anchoring fleece of Schlüter®-KERDI-BOARD. Standard dry set adhesive as defined by EN 12004 is suitable for most substrates. Otherwise, select another suitable adhesive, carefully checking for any incompatibilities of materials.
3. Apply thin-bed adhesive over the substrate with a notched trowel and fully embed the anchoring fleece of the Schlüter®-KERDI-BOARD panels in the adhesive bed. Tightly abut the individual panels and align them appropriately. Observe the curing times of all materials.
4. Provided the substrate is sufficiently load-bearing, Schlüter®-KERDI-BOARD panels from a thickness of 28 mm can be installed with spots of thin-bed adhesive or other suitable adhesive, followed by height alignment. To ensure proper weight bearing of the covering, place the dabs of adhesive closely together. Apply thin-bed adhesive to the joints at the edges of the panels and ensure they are supported by dabs of adhesive from below.
5. Use an edge strip to eliminate the build-up of tensions in Schlüter®-KERDI-BOARD and the tile covering in edge areas.
6. The tiles (minimum size: 5 x 5 cm) can be installed immediately after fully embedding the Schlüter®-KERDI-BOARD panels, using a dry setting adhesive that meets the requirements of the covering. If using dabs of adhesive, allow them to cure first for full weight bearing of the substrate. Choose a notched trowel to match the tile format. The curing times of the thin-bed adhesive must be observed.
7. Observe the applicable technical standards for movement joints used in field definition and edge and connection joints.

Note: See section “Waterproofing" on the use of Schlüter®-KERDI-BOARD in bonded waterproofing assemblies.

Waterproofing with Schlüter®-KERDI-BOARD

Schlüter®-KERDI-BOARD can be used in accordance with the German waterproofing standard DIN 18534. Water exposure classes: W0-I to W3-I*. Furthermore, Schlüter®-KERDI-BOARD features the national technical approval (abP) required in Germany. Moisture load class according to ZDB: 0 to B0 and A and C.

Schlüter®-KERDI-BOARD features European Technical Approval (ETA) pursuant to ETAG 022 (watertight covering kits) and bears a CE mark. It must be ensured that only system-approved thin-set adhesives are used in areas that require CE conformity or compliance with the general certificate of national technical approval. Please contact the address specified in this data sheet for further information on suitable thin-set adhesives and the corresponding test certificates.

* With abP and/or in compliance with ETA according to ETAG 022. Please contact our Application Technology department for further information regarding use and installation.

If constructing designs of load category B, “Containers" (e.g. swimming pools), we recommend the use of our waterproofing membrane Schlüter®-KERDI (see product data sheet 8.1 Schlüter®-KERDI).

For this purpose, the joints and corners of Schlüter®-KERDI-BOARD in the area must be fully covered with the sealing band Schlüter®-ERDI-KEBA (minimum width 12.5 cm), embedding the sealing adhesive Schlüter®-KERDI-COLL-L. The sealing band should have at least 5 cm of overlap.

Schlüter®-KERDI-KEBA band is also suitable for creating functional connections to fixed structural elements such as door openings or windows of metal, wood or plastic. For this purpose, apply Schlüter®-KERDI-FIX on the adhesive area of the fixed structures and Schlüter®-KERDI-COLL-L on the adhesive area of Schlüter®-KERDI-BOARD and cover the entire joint area with sealing band.

The suitability of Schlüter®-KERDI-FIX for the built-in components must be verified in each individual case. The feasibility of the connections must be evaluated on the basis of individual construction requirements. Implement all connections with great care. Separate Schlüter®-KERDI-BOARD above the existing movement joints and structural joints and cover the abutting joints with Schlüter®-KERDI-FLEX. Schlüter®-KERDI-FLEX is also recommended for flexible edges.

Plaster and trowel-applied coatings over Schlüter®-KERDI-BOARD

These materials may adjoin tiled coverings (e.g., tiled skirtings) or be applied to entire walls in other areas. Abutting joints within the area, at the internal and external corners, and at exposed edges must be reinforced and covered with a trowel-applied material. The self-adhesive joint reinforcement tape Schlüter®-KERDI-BOARD-ZSA should be used for this purpose.