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wedi Fundo Riolito
®
neo Installation
Before Installation:
 Have extra 2 × 4 blocking installed over bottom plate between studs
along to support wedi Building Panel to shower base transition area.
 Suboor is stable, even and load bearing, and meets deection criteria of
maximum L/360 and requirements as per IRC. Wooden or concrete structural
substrates are dry and sufciently load bearing considering live and dead
load. Wood and Steel framing is sufciently load bearing, plum and square.
 Floor drain assembly below oor is stabilized, xed and supported in
position, and will not sink under water load.
 Only wedi products (Building Panels, Curb, Joint Sealant and Fasten-
ers) are used for wedi Fundo Shower System assembly.
 Installer has received instructions from wedi Technical Sales Staff or is
informed about proper installation methods as described.
 wedi Shower Bases can be cut to size using a skilsaw. The Z notch channel
must be remade and cleaned from sawdust or other possible contamination.
 Follow applicable state or local plumbing codes requiring specic and
dimensioned waterproofed areas for a shower system or other wet
room installation. Requirements in this manual supersede local plumb-
ing codes; they extend and are not in conict. wedi Shower Systems
or other wet room installations in which non-wedi product is also used
require specic project recommendations by wedi and may reduce the
extent and installation area of protection offered by wedi’s warranty.
 Ensure that no fasteners are used and penetrate through any horizontal
building panel or shower base surfaces in shower or immediate wet
rooms. This includes tub decks, pony shower wall tops, curb tops made
from building panels, seat tops. wedi panels in such areas are installed
in a full surface applied thinset mortar setting bed.
01 02 04
Cut the 2” (50.8 mm) pipe 1 1/4” (31.8 mm) below the top of the Sub-
oor. Use the oval shape cutting template where you want to position
the drain to cut out suboor using a jigsaw to allow wedi drain trap to be
inserted and connected to oor pipe using appropriate ABS compatible or
multipurpose cement glue. Please also check cement glue compatibility to
oor pipe material. The drain and trap have to be secured to the suboor.
Drain recess cut out must not add deection to suboor.
Assemble the
drain unit following the instruction drawing. wedi‘s Fundo Riolito neo
bases can be cut to size on all sides making drain positions as close to the
wall possible. Do not cut into the linear drains plastic ange integrated into
the coated foam part of the base. Once cut the 1/2” × 1/2” (12.7 × 12.7
mm) channels at the new base perimeter must be reestablished. When
cutting close to the drain channel always leave enough wedi foam for
re-making the needed 1/2“ × 1/2“ (12.7 × 12.7 mm) channel.
03
Glue and seal the wedi drain trap to the 2” (50.8 mm) pipe using appropri-
ate solvent cement glue for the plastics involved. Do not screw drain body/
trap to oor. Secure with some dabs of wedi Joint Sealant under ange
instead. Mount the oval sealing collar / gasket to the base‘s receiving ABS
plastic channel on it‘s underside with no gaps showing in between both
parts. Use only the wedi screws provided and manually tighten with a Phillips
screwdriver. Instead of gluing the drain trap to the oor pipe rst, you may
also connect it to the wedi Base‘s sealing gasket rst to ensure a visibly tight
connection. The trap will then glued to the oor pipe later when the base is
installed to the oor. Apply a skim coat and nally a combed through bed
of a thinset using modied thinset ANSI 118.4 and 1/4” × 1/4” (6.4 ×
6.4 mm) notch trowel. There are different ways to ensure good bond of
the wedi Base to the suboor. Required is a setting bed thickness of min.
3/16“
(4.8 mm) and max. of 5/16“ (7.9 mm) (compressed). Applying
thinset on both, wedi Base and suboor, is a best practice recommended
to achieve full surface coverage adhesion. Another best practice is to use
fast setting mortar to achieve faster bond and adhesion.
 Seams in the assembly, which are not flat transitions or right angle
inside corner connections, are treated with these extra steps:
 Assembly parts are installed tight and offer a minimum of ½ in. wide
continuous contact/ adhesion surface between two parts, inside
which wedi joint sealant is continuously applied.
 wedi joint sealant is applied over these seams topically, and 1 in.
wide on both sides of the seam.
 wedi mesh tape is installed over these seams and covered with joint
sealant 1 in. wide on both sides of the seam.
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