Product Brochure

wedi Building Panel (incl. wedi Vapor 85)
General Requirements
 1/2” (12.7 mm), 5/8” (15.9 mm) or 1” (25.4 mm) Building Panels
are the recommended minimum thicknesses for installation to framing
 Wood Framing: 2 × 4‘s (framing depth 3 1/2” [89 mm]), Maximum
stud spacing 16” (406.4 mm) o.c.
 Metal framing requirement 20 gauge or heavier studs with maxi-
mum 16” (406.4 mm) o.c. spacing
 Maximum allowed deflection L/360 based on gauge, stud material, de-
sign and connection points of framing, and consideration of total load.
 wedi 1” (25.4 mm) Building Panel or thicker can be used over 19.1”
(485 mm) o.c. spaced wall framing

2” (50.8 mm) wedi alkali resistant fiberglass mesh tape to be applied
over all seams in dry areas. wedi waterproof Joint Sealant or wedi Sealing
Tape to be applied over all seams and fastener locations/heads if a
waterproof installation is required

Attach wedi Building Panels with one fastener per every 12” (304.8 mm)
and in between adjacent panels (seams) over wall framing
 On ceilings, use one fastener per every 6” (152.4 mm) and in be-
tween adjacent panels (seams)
 wedi Waterproof Joint Sealant or wedi Sealing Tape to be applied over
all seams and fastener heads if a waterproof installation is required
 wedi Joint Sealant or wedi Subliner Sealing Collars are used where
plumbing or other equipment protrusions through walls must be sealed
 The Building Panel should be notched out at the bottom to install
safely and plumb against the flange of the tub. A bead of wedi Joint
Sealant is applied against the flange of a tub. Use wedi Tub sealing
tape with its butyl sealing strip to create such connections with non-
nailing flange tubs or trays.
 wedi Product Systems are only used for interior installations.
 wedi Building Panel is not a sound deadening product. While it may
reduce airborne sound, it is not IIC or STC rated and should not be
used to actively reduce or remove sound transmission.
 Do not use as a wear surface or without tile / stone or other suitable
coverings.
 wedi products are tested and classified with an A rating for fire be-
havior safety but are not a fire resisting barrier. An alternative backing
providing actual fire resistance must be installed (e.g. 90 minute fire
rated drywall)
 Do not use organic mastic adhesives for setting tile on wedi Systems
in wet areas.
 Adhesive coverage under tile or other suitable surface finishes in wet
area installations must be a minimum of 95%.
 In steam showers or steam rooms use only setting materials specifi-
cally recommended by the manufacturer for this application, and sub-
merged and hot temperature areas. Setting materials recommended
by wedi are commonly solid epoxies (meet or exceed ANSI 118.3) or
high performance modified mortars (meet or exceed ANSI 118.15).
Test the adhesion over vapor barriers.
 Use only thinset mortar setting materials suitable for installation and
adhesion to the specific substrate types.
 Ensure tile and setting materials incl. grout are suitable for the appli-
cation (e.g. submerged applications or steam rooms)
 Certain substrates must be primed prior to thinset mortar attachment.
 Do not use where substrate is subject to excessive moisture and mois-
ture content changes.
 A wedi installation does not replace the need for Expansion and/
or Movement joint placement within a tile installation. Please follow
recommendations found in the TCNA guidelines (Detail EJ171).
 All installations shall be in conformance with IRC for residential installa-
tions and IBC for commercial installations or applicable building codes
in a region including the consideration of properly designed substrates.
All installations including the consideration of properly designed sub-
strates should be in compliance with current TCNA Handbook for
Ceramic, Glass and Stone Tile Installation, use details specific to “Ce-
mentitious Coated Extruded Foam Backer Board”. wedi’s technical
recommendations supersede all requirements of IRC, IBC, IPC or TCNA
where in conflict and exceeding minimum requirements established by
the above mentioned institutions.
 Contact wedi for installation of tile or stone smaller than 2 × 2”
(50.8 × 50.8 mm) and larger than 12 × 12” (304.8 × 304.8 mm) over
wedi product, and where wedi Building Panel is used in commercial
use areas, to learn more about the best practices and requirements
applied in such applications. Follow tile manufacturers‘ recommen-
dations for appropriate tile choice, setting materials and installation
techniques.
 When building free standing, non framework attached walls using
wedi 2“ (50.8 mm) building panel, the maximum wall length may
extend to 4 ft. (1,220 mm) without the need to firmly attach the
wall to the ceiling (attachment to floor and wall only). It is helpful to
double up walls for larger adhesion and support surfaces to floor and
wall, and to Z-notch connect these walls to channels of wedi Shower
Bases. Such structures will produce blue foam edges which should be
covered with wedi 1/8” (3.2 mm) or thicker panels to provide best
adhesion surfaces for tiling. Such panel strips can be installed with
wedi Joint Sealant.
 Maximum weight of surface coverings and setting materials applied
to wedi Building Panel on walls are 23 lbs/sqft. (112 kg/ m
2
) and 18 lbs/sft
(88 kg/ m
2
) on ceilings.
 All wall substrates are to be prepared prior to installation to guar-
antee plumb, even, level and squared (corner) areas to install wedi
product. On ceilings, the substrates must be even, level and squared
with the wall.
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