Product Brochure

Requirements/Limitations for wedi products
used in Shower and Wet Room applications
 wedi products are only used for interior installations in
buildings.
 wedi product can be used in both residential and many
heavy-duty commercial use/building applications. Please
contact wedi for specific use ratings, testing, and
certifications.
 Ensure you choose the right wedi product designed for
the intended application, including walls, floors, shower
floors, seats, benches, curbs, ramps, countertops, and
many more.
 Store wedi products in their original packaging and flat
in a dry interior building, and you must avoid exposure to
direct sunlight/UV and humidity.
 wedi foam-based products can deform at temperatures
over 165°F. Therefore, when using wedi products over
kitchen countertops or near fire places, ensure limited
heat exposure.
 Do not use wedi foam-based products with solvent-based
adhesives, rubberized solvents, or ketones.
 Please read wedi Safety Data Sheets before working with
wedi product.
 wedi foam products are not used for sound reduction
applications, but they offer waterproofing and thermal
insulation properties. wedi products should not be
installed over heated floor systems or where they may
trap moisture.
 wedi Building Panels are waterproof but not sufficiently
water vapor-proof for use in steam rooms. Use wedi’s
Building Panel Vapor 85 and its system accessories in
steam room applications. wedi Fundo Shower bases,
when applied over cold or uninsulated substrates,
should be vapor-proofed using wedi Subliner Dry sheet
membrane system. When used in steam rooms, curbs,
seats, or benches must be vapor-proofed using the wedi
Subliner Dry sheet membrane system.
 Do not integrate or install other products through wedi
Fundo shower floors. For example, when installing
objects to wedi Building Panels, such as towel holders or
handlebars, these cannot be anchored in the wedi product
but require anchoring in the structural construction behind
wedi Building Panels. Alternatively, solid mounting boards
can be installed into the surface of some wedi Building
Panels so that fasteners can be applied. Contact wedi for
specific project recommendations.
 Do not use wedi products in assemblies for submerged
installations before contacting wedi to ensure proper
material choice and installation processes and techniques.
 Do not install additional products except intended and
approved surface finish materials. These items may
interfere with wedi’s performance. For example, they may
not be waterproof (e.g., uncoupling membranes are not
waterproof due to open seams and contain much thin-set
mortar and should not be used over wedi shower floors).
 When installing electric floor heating systems over wedi
foam-based products, these should be installed over
wedi’s cement coating surface. Integration of cables into
wedi foam-based product creates the risk of heat build-up
and malfunction due to heat being trapped in wedi’s
insulating material. Hydronic floor heating systems may
be integrated into wedi foam-based products if they do
not penetrate or threaten the stability of the product.
 wedi foam-based products have a Class A rating for fire
behavior and safety and are equipped with modern and
fully bonded fire retardants. wedi products can be used in
residential and commercial use buildings on the interior.
In applications that require interior walls, floors, or ceilings
to provide a fire-resistant barrier, wedi products must be
installed over fire-resistance-rated substrates, such as
rated drywall or gypsum assemblies.
 wedi joint sealant and wedi 620 sealant are moisture
curing products. In colder temperatures and lower
humidity in the air present, the curing process may be
heavily delayed. It may take up to 48 hours longer than
in ideal conditions ( 72°F and 50% RH). Do not expose
the sealants to water before a firm skin has formed and
the sealant is no longer pliable and will not leave a sticky
residue when touched. In a low humidity environment,
it can be helpful to treat assembly seam areas with a
moist sponge before applying sealant (puddles must be
avoided).
 Concrete and wooden subfloors, metal and wooden
wall framing, and other suitable substrates over which
wedi product systems can be installed must be made of
adequate material quality and be built in compliance with
the applicable Building Code.
 Suitable substrates and their surfaces must be clean and
even. Remove any residues, oil, waxes, grease, or other
contaminants acting as possible bond breakers. Also,
remove any unintended obstructions and protrusions,
such as nails sticking out from surfaces.
 Suitable substrates must be sufficiently loadbearing and
minimize the potential for a movement that may cause
stress on the product and cause damage. Over horizontal
surfaces such as floors or benches, but not over framed
ceilings, wedi product must be fully supported by a
substrate. Over vertical surfaces such as wall framing
and including the underside of ceilings, you must install
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