Use and Care Manual

12.1 Schluter
®
-KERDI-BOARD
Property Method Value
Water vapor permeance ASTM E96
1
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 Pass
2
Thermal barrier evaluation NFPA 286 Pass
2,3
suitable preparation of the abutting seams
and joint areas, the panel may be used for
bonded waterproofing assemblies.
KERDI-BOARD is suitable for: creating
tile substrates on masonry walls, wood
or metal framing, and other finished wall
surfaces; creating straight or curved
partition walls; creating straight or curved
bathtub and shower surrounds; concealing
pipes and columns; as well as creating
bathtub platforms, vanities, storage shelves,
countertops, and various other bathroom
structures.
The boards are simply cut to size with a
utility knife. The gridlines, which are printed
on the surface, are helpful for neat and
quick cuts and installation. KERDI-BOARD
can be fully adhered in wall areas or spot-
bonded with thin-set mortar. If necessary,
the material may be secured with additional
wall anchors. In the case of stud framing,
KERDI-BOARD is attached with screws
and washers from the matching hardware
system. Tiles can be installed directly over
KERDI-BOARD using the thin-set method.
L-shaped and U-shaped KERDI-BOARD
panels are available for creating pipe and
column coverings, and grooved panels
are available for creating curved elements.
Schluter
®
-Systems also offers profiles and
attachment hardware for wall connections
and finishing edges, as well as matching
wall anchors and screws.
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 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 different application areas. 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
freestanding 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.
Maintenance
Storage
KERDI-BOARD should be stored flat.
In case of outdoor storage, protect the
material from direct sunlight and weather
exposure.
Shower Drains
Conventional two-stage drains are
designed to connect to shower pan liners
below the mortar bed and do not allow a
secure, watertight connection to bonded
waterproof membranes at the top of the
drain assembly. KERDI-DRAIN and KERDI-
LINE are designed specifically to ensure a
simple and secure connection to bonded
waterproof membranes, such as KERDI, at
the top of the assembly rather than below
it, thereby reducing the risk of leakage,
efflorescence, and mold growth.
Application and Function
8.2 Schluter
®
-KERDI-DRAIN is a floor
drain specifically designed to allow
connections to KERDI or other load-
bearing, bonded waterproof membranes.
The membrane is adhered to the large
integrated bonding flange to form a
waterproof connection at the top of the drain
assembly. KERDI-DRAIN consists of a drain
casing and fully adjustable grate assembly
or covering support to which tile is applied.
The grate assembly accommodates a
wide range of tile thicknesses and allows
lateral and tilt adjustment as well. The
covering support is placed flush with the
top of the bonding flange and can therefore
accommodate any thickness tile covering.
The standard KERDI-DRAIN is attached
directly to the waste line. The drain casing
is available in ABS, PVC, or stainless
steel. The plastic drain casings feature a
fleece-covered bonding flange. They are
available with standard 2" (50 mm) and 3"
(75 mm) outlets and attached to the pipe
using an appropriate solvent cement. The
stainless steel drain casings are available
with standard 2" (50 mm) or 3" (75 mm)
no-hub outlets or 2" (50 mm) threaded
outlet. The no-hub outlets are attached to
the pipe using an appropriate mechanical
(e.g., flexible or no-hub) coupling. The
threaded outlets are attached to the pipe
using thread sealing compound or tape.
The simple connection to standard drain
SHOWER SYSTEM
4
8.2 Schluter
®
-KERDI-DRAIN
8.7 Schluter
®
-KERDI-LINE
1
Using the desiccant method at 100°F (38°C) and 90% RH
2
Per International Building Code Requirements
3
Porcelain tile used as thermal barrier over 1/2" (12.5 mm) -thick KERDI-BOARD on wood framing