Schluter®-KERDI-BOARD is a multifunctional tile substrate and building panel that gives
tile setters more control over their projects by providing them with the means to simply and
easily create ideal substrates for tile. KERDI-BOARD can be used to create a tiled
corner shelf within a shower. To finish the face of the shelf there are many options
available using Schluter® Profiles. To begin, select the panel thickness
according to the size and expected stresses of the project. Please refer to the KERDI-BOARD Technical
Datasheet for more information on choosing the panel thickness suitable for your application.
In this example, we will be using a one inch thick panel. This is sufficient to support the
expected shower accessories and can be elegantly finished with the Schluter°-RONDEC-CT profile.
While KERDI-BOARD can be cut with a utility knife,
in this application we will be using a jigsaw to ensure precise cuts.
Dry fit the shelf into place to ensure a proper fit is achieved. Adjust if required.
Begin the installation process by determining the desired shelf elevation and mark with a level
line. You may want to consider the wall tile layout and position the shelf to help make any
cuts to the adjacent tiles as simple as possible. The shelf can be prepared and finished with
tile and profiles beforehand for a quick and simple installation.
Prior to tiling the shelf, we seal the joints and corners of the KERDI-BOARD with KERDI-BAND
waterproofing strips since the shelf will be installed in a wet area. The KERDI-BAND must
overlap the edges by at least two inches. The face of the shelf can be finished in a
number of ways using Schluter Profiles: The KERDI-BOARD-ZA brushed stainless steel
U-profile can be used in combination with matching Schluter-RONDEC or Schluter-QUADEC profiles.
Another option is to use the RONDEC or QUADEC profiles, but finish the face with tile.
We will be using the Schluter-RONDEC-CT profile in this installation. It provides a rounded edge
on the top and bottom and a recessed section to which tile is bonded on the face of the shelf.
The RONDEC-CT and tiles are installed using unmodified thin-set mortar.
Using the one-inch thick KERDI-BOARD and three-eighths inch thick tile produces
a flush transition between the tile on the underside of the shelf and the profile.
Set the wall tile up to the level line. Depending on the shelf placement, you may
need to cut adjacent tiles to fit. Apply thin-set mortar to the
area where the shelf is to be placed. Butter the sides of the shelf with unmodified
thin-set mortar and solidly embed it onto the wall, resting on the previously installed tile.
Align with spacers or wedges. The shelf may be raised at the back to create a slope,
or the tile may be set on a slope during installation, to prevent water from
pooling in the finished application. A brace may be needed to hold the shelf
into place until the thin-set mortar sets. Continue setting the remaining wall tile.
KERDI-BOARD gives tile setters more control over their projects by
providing them with the means to simply and easily create ideal substrates for tile.