The Schluter®-KERDI-BOARD-KIT is the perfect solution for waterproofing walls in tile applications
around bathtubs and acrylic shower bases.
It is easy to handle and transport.
The kit contains everything you need, all in one convenient package.
Let's take a look at what you're getting.
Eight pieces of one-half inch thick KERDI-BOARD are included, which is enough material to
cover a standard surround for a bathtub or an acrylic shower base with eight foot ceilings.
The KIT can also be used with Schluter® pre-fabricated shower trays.
The KERDI-BOARD-ZT washers and ZS screws are supplied to fasten the KERDI-BOARD to the wood studs.
For installations over metal studs, additional self-tapping screws must be purchased separately.
You will also find KERDI-BAND waterproofing strips to seal seams, corners and fastener penetrations.
KERDI-SEAL-MV mixing valve seals and KERDI-SEAL-PS pipe seals are included as well.
Both one half inch and three quarter inch size pipe seals are included.
Two cartridges of KERDI-FIX sealant are also provided.
The KERDI-BOARD-KIT is quick and easy to install.
Please refer to the included instruction sheet and
the Shower System Installation Handbook prior to installation.
KERDI-BOARD can be mounted either vertically or horizontally.
The layout may vary depending on what style of tub you are using.
For example, if you are using a shorter bathtub, a vertical layout will be most practical.
Keep in mind, the vertical edges of each panel must be positioned over
the center of a stud or other solid backing.
The maximum allowable stud spacing for one-half inch thick KERDI-BOARD is sixteen inches on center.
Install additional studs or solid backing if required.
Measure the area to be covered to determine your KERDI-BOARD layout prior to cutting the board.
Cut the KERDI-BOARD to size.
It is easily cut with a utility knife.
We will also measure and cut openings for the pipe protrusions and mixing valve.
When KERDI-BOARD is installed on a bathtub that has a thin flange,
the back of the board can be notched to cover it.
Leave a one-quarter inch -wide gap between the KERDI-BOARD and tub deck.
When KERDI-BOARD is installed above the tub flange, the board can be abutted flush with the flange.
Fasten the boards to the wood studs using the included washers and screws.
The maximum allowable fastener spacing is twelve inches on-center.
With the protective film removed from the bathtub, place painter's tape around the tub deck for protection.
The tape should be placed closely to the lip of the tub, but not underneath the KERDI-BOARD.
KERDI-BOARD is sealed to the bathtub using KERDI-FIX in conjunction with thin-set mortar and KERDI-BAND.
Apply KERDI-FIX to the tub flange.
and spread using a small notched trowel.
Using the KERDI-TROWEL or a one-quarter inch by three-sixteenths inch V-notched trowel,
apply a minimum of five inches of any Schluter thin-set mortar.
or an unmodified thin-set mortar to the KERDI-BOARD.
Apply mortar using the flat side of the trowel, and then
comb additional mortar over the area where the KERDI-BAND is to be installed.
The thin-set mortar is mixed to a fairly fluid consistency but still able to hold a notch.
Apply KERDI-BAND and embed the membrane into the mortar and KERDI-FIX to ensure full coverage.
Make sure you have two inch overlaps at all seams.
This process of embedding the KERDI-BAND into the KERDI-FIX and thin-set mortar
is repeated around the entire bathtub.
When the bathtub has a thin flange, completely fill the one-quarter inch-wide gap with KERDI-FIX.
Then apply the thin-set mortar and finally, the KERDI-BAND.
Immediately after the waterproofing around the tub deck is complete,
carefully remove the painters tape.
All KERDI-BOARD joints, corners, and fastener penetrations must be sealed with KERDI-BAND.
Again, a two inch overlap is required at these areas.
KERDI-SEAL-PS is used to seal protrusions through the KERDI-BOARD
at the tub spout and showerhead.
KERDI-SEAL-MV is used at the mixing valve.
When transitioning to drywall, KERDI-BAND in conjunction with thin-set mortar is appropriate
to maintain waterproof integrity while also providing a transition at this joint.
Corner bead can be used when transitioning at corners such as partition walls.
In our installation, we are installing KERDI-BAND in this area.
We will finish this corner with a Schluter profile to protect the edges of our tile and
to provide a clean finish.
The KERDI-BOARD-KIT installation is now complete.
The bathtub surround is waterproof and ready for tile.
When the KERDI-BOARD-KIT is used with an acrylic shower pan, the process for installation is the same.
Depending on the type of flange on the shower pan, the board can either be abutted flush
with the top of the flange, or notched and installed one-quarter inch above the pan as shown previously.
The boards can be mounted horizontally to cover the shower area and fastened with the
supplied screws and washers.
Remember, the vertical edges of each panel must be positioned over the center
of a stud or other solid backing.
Add support if required.
Waterproofing is completed as shown previously.
Use KERDI-FIX with thin-set mortar and KERDI-BAND to seal the KERDI-BOARD to the shower pan.
Then use more KERDI-BAND, KERDI-SEAL-PS, and KERDI-SEAL-MV to seal all seams,
fastener penetrations and pipe protrusions.
The KERDI-BOARD-KIT installation in a shower application is now complete and ready for tile.
To replace sealant joints and protect tile edges, consider the use of Schluter Profiles such as DILEX-AS.
Another option would be the DILEX-BWA profile.
These profiles provide a clean and maintenance-free finishing touch to bathtub and shower surrounds.
If tile is to be set on adjacent floors, consider the use of the Schluter-DITRA uncoupling
and waterproofing membrane, which can be sealed to the Schluter-Shower System
to provide comprehensive waterproofing in the bathroom.
Please visit Schluter.com for more product information and to view our installation videos and handbooks.