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All fastener points are visibly covered with wedi joint sealant. All protrusions
(ie. plumbing fixtures) are sealed into the wedi assembly with wedi gaskets
and sealant. All visible joints or seams in the installation are visibly covered
and reinforced with wedi Joint Sealant or wedi 620 Sealant (at seams
involving Subliner Dry Sheet membrane or sealing tape) that is applied flat
over the seams. Coverage of sealant over all seams should be at least 1 in.
on either side of the seam. wedi Joint Sealant should be no less than 1/16 in.
thick to ensure strength. Do not add mesh tape into the wedi Joint Sealant;
this may put the waterproofing performance at risk, and will not strengthen
the sealant or system resistance against movement-related stresses. It is
recommended to add wedi mesh tape over seams featuring outside corners
(e.g. pony wall tops or curb deck transitions). The wedi mesh tape is applied
over finished and topically sealed seams once these are dry to the touch.
wedi joint sealant is then applied to cover the mesh. This method allows
you to apply more sealant consistently over a transition where it is difficult
to apply sufficiently thick sealant. The mesh functions here as a thickness
gauge, but has no other function. Once the sealant has been applied over
all shower system seams, an optional water flood test may be performed by
building a temporary dam and water can be added as little as 12 hours after
application of wedi sealant 620. Please ensure both, wedi joint sealant and
wedi sealant 620 have cured sufficiently and has formed a skin no longer
pliable or sticky leaving sealant residue upon touch. The sealants are moisture
curing products that will react to cure very slow when applied in a location
with low relative humidity in the air, and it will overreact and malfunction
if exposed to too much water (e.g. flood test) too early. wedi sealant 620
needs extended cure times. The flood test should not exceed 24 hours, nor
should the water level exceed the height of the perimeter seams so that the
fresh sealant may continue to a full cure without too much weight added
during that process. wedi recommends testing the drain connection for a
proper seal. While a full surface flood test is not required for non-absorbing
products like wedi, it may be required by a building inspector. A temporary
dam can be installed to conduct flood testing in this curbless shower design.
When tiling commences, no premixed (“mastic”) tile adhesives may be used
over wedi systems in any wet area installation. When tiling the wedi Shower
Bases, including extensions, tile thickness should generally be no less than
1/8 in. Choose setting materials appropriate for the type of stone, ceramic,
or glass tile as well as for a wet area installation. No tile smaller than 2 x
2 inches square may be installed over Fundo Ligno. No pebble stone
or tile with irregular or non-flat underside may be installed over
Fundo Ligno. Tile may be installed using a good quality modified
cement based tile adhesive and grout or solid epoxy adhesive and/
or grout. When installing non-square tile, the length of the shortest
tile edge(s) are considered as its square size for the purpose of
determining the choice of the setting materials as outlined above.
Moisture sensitive tile and stone, including marble, are best protected when
installed using solid epoxy tile adhesive and grout. It is recommended to
verify with manufacturers of mesh mounted tile that the adhesive and mesh
used to back the tile is appropriate for use in wet areas. It is important to
achieve full transfer of the thinset mortar through the mesh to the back
of the tile. A best practice we recommend is to remove the mesh when
setting the tile. All tile installations designed to receive heavier point loads
(i.e. wheelchair use) must be grouted using 100 % solids epoxy grout. Large
format tile may be installed over wedi Fundo shower bases. Cuts may have
to be made in consideration of the base’s slope lines and so that the tile
can always be fully supported by the tile adhesive setting bed, and the
surface of the wedi Base. Refer to TCNA guidelines for setting material
coverage required by the tile being installed in the wet room application
here. Use only cleaners and sealers free of acid or solvents on tile or grout
installed over wedi product, and apply only in amounts needed to treat the
surface materials without drenching the substrate. Follow setting materials
manufacturer‘s recommendations, and contact wedi with any questions, or
regarding applications not covered here.
 Where wedi Building Panel or curb overs / caps are installed over horizontal
surfaces (seats, curbs, tubdeck transitions) do not set any fasteners and
do not allow the glass door installation to penetrate the wedi panel as it
is your waterproong.
 Make sure that doors are installed tight to contain water inside the shower.
Make sure doors are installed to only load bearing reinforced framing.
Consider wedi CURB AT (Anchor Track) when planning to mount glass
door/panel xtures through the curb surface. Ensure not to anchor doors
or glass panels through the sloped shower base oor but position the
door/glass panel right at the beginning of the slope but anchored into
the at oor structure. Ensure proper waterproong of anchor points.
 Where wedi buildig panel is installed over corners of a structure showing
an angle other than 90° please miter the board edges to gain adhesion
surface. Utilize a wedi sealing tape in addition to regular sealing for
safety.
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