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may lead to failure of these materials to develop inherent
strength, and it may lead to continual setting processes
that wear and tear on other products in the assembly.
 A wedi installation does not replace the need for
Expansion and/ or Movement joint placement within a tile
installation. Follow recommendations found in the TCNA
guidelines (Detail EJ171).
 wedi Building Panel can carry a tile covering weight and
loads of up to 23 pounds per square foot on walls and up
to 15 pounds per square foot on ceilings.
 When setting tile over wedi Vapor 85, please choose
appropriate setting material and tile for use in steam
rooms and steam showers. We recommend not to use
natural stone tile or slab. We recommend to use porcelain
tile with low water absorption potential (as classified in
ANSI 137.1). We recommend the use of solid epoxy
setting mortar and grout (as per ANSI 118.3). Please
note that tile application over wedi Vapor 85 panels is
limited to a combined load and weight of tile and setting
materials of up to 10 lb per square foot, and on ceilings
up to 5 lb per square foot. Where heavier loads up to 10
lb per square foot are required, please use wedi Building
Panel and apply wedi Subliner Dry in thinset mortar (ANSI
118.3 or ANSI 118.4). With this option, please allow
sufficient curing time for cement based and hydraulically
curing thinset mortars between the two waterproof
layers prior to installing tile.
 wedi Fundo Shower Bases, supported by a structural
subfloor, can carry up to 100 pounds live and dead load
per square foot and resists point loads of up to 100
pounds per square inch once tiled with a minimum ¼ in.
thick ceramic tile.
into the framing stud at a rate of 1 fastener per
every 1 foot on a wall, and at a rate of 1 fastener
per every 6 inches on a ceiling. Where possible, wedi
fasteners should be installed into seams between
adjacent panels to create smooth transitions. Wall
framing must be square and plumb. wedi does not
recommend wet shimming between framing studs
and wedi Building Panels. This application is outside
the intended design and performance of most general
use thinset mortars.
 wedi Building Panels are installed to solid walls, such
as drywall, plywood, or concrete/brick surfaces, using
thin-set mortar (substrates may require priming).
Where possible, fasteners should be used additionally
to help with compressing the thin-set mortar while
it cures.
 wedi Building Panels are installed to a horizontal
substrate such as a subfloor using thin-set mortar
adhesive and wedi fasteners set at a rate of 1 fastener
per every 1 square foot of wedi panel on the floor.
Where possible, wedi fasteners should be installed
into seams between adjacent panels to create smooth
transitions. Tabless wedi washers are available for
wedi Building Panels 1/8 in. or ¼ in. when used on
a floor. The flat washers will not interfere with the
wood subfloor, unlike wedi’s tab washers when used
with thinner Building Panels. No fasteners are used on
small horizontal substrates, such as sloped benchtops
or half wall tops.
 wedi products are suitable for coverings made of ceramic
and porcelain tile, glass tile, natural stone tile and slabs,
and select composite material claddings. These are installed
with suitable and specific thin-set mortars recommended
by the tile manufacturers, but these have to be suitable
for wedi products.
 wedi recommends using thin-set and grout mortar setting
materials suitable for installation and adhesion to the
specific substrate/subfloor type and the tile to be installed.
We recommend thin-set and grout mortar materials that
meet the classifications of ANSI 118.3, ANSI 118.4, ANSI
118.11, or ANSI 118.15.
 Steam showers or steam rooms use only setting materials
specifically recommended by the manufacturer for this
application and submerged 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).
 Do not use premixed and organic mastic mortars when
installing wedi products to substrates or when installing tile
in wet area environments as these may cause mold growth
and may not perform well in a wet area environment or
when applied between surfaces with low or no water
absorption capability.
 Follow setting material manufacturers’ recommendations
for cure time of thin-set and grout mortar materials and
do not subject the materials and the application to traffic,
load, or moisture (e.g., shower use). Pre-mature exposure