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21. Apply continuous 1/2 in. beads of sealant between all connections of panels and install with tightly butted seams. Excess

sealant must be spread flat with a putty knife. All seams and fastener heads in the assembly are covered with a topical 1/2

inch bead of sealant and spread flat. The seams should be covered 1 in. on either side of a seam. All fastener / washers are

covered with sealant stretching 1 in. over the washer edges.

22. wedi Niches are installed in a cut out in the wedi wall and attached with its flange right into the center of 16 in. o.c. studs.

wedi Joint Sealant is set along the connection of wall to niche.

23. Fasteners every 12 inches on either side of the niche, or a minimum of 1 fastener on each of the 4 corners, are set to create

a flat transition to wall panels. Another 1/2 in. bead of wedi Joint Sealant is spread flat over fasteners and seams.

24. For the installation to properly work it is critical to waterproof all penetrations of the wedi product such as shower valves

and shower heads using the appropriate sealing gaskets for the application. The wedi Mixing Valve Flexi Collar and wedi

Flexi Collar (for 1/2 in. – 3/4 in. shower pipe protrusions) are used for these applications, and are installed using a full bed

of wedi joint sealant or wedi sealant 620 for attachment. These sealing measures are required for wedi‘s waterproofing

system warranty. Contact us for alternative waterproofing options if fixtures do not fit wedi standard collars so we can

recommend optional best practices under wedi warranty.

25. Fill unused Ligno perimeter channels by attaching wedi panel strips (included in box) using Joint Sealant. You must install

wedi Subliner Dry waterproofing membrane over the subfloor or substrate outside the shower. It should reach 4 in. into

the Ligno shower base, and extend up the walls by at least 2 in. (flashing), and extend a minimum of 3 ft. outside of the

shower. If water spray can reach further out, extend the membrane further so that there are 3 feet of waterproofing

outside of the spray radius.

26. Apply the Subliner Dry membrane to the substrate or subfloor using modified thinset and using a 1/4 in. × 1/4 in.

notch trowel. Use wedi sealant 620 instead of thinset between seam overlaps of two membrane sheets, which must

be made 2 in. wide. Use wedi sealant 620 also within the 2 in. where membrane sheets terminate on the Ligno

surface, and use sealant 620 to attach the wall flashing against the wall substrate. Apply the wedi sealant 620 only

once the thinset below wedi Subliner dry has cured (as per thinset mortar manufacturer installation instructions

and wedi Subliner dry installation instructions). Please choose the appropriate Subliner Dry products needed for

the project, including Subliner Dry Sheet membrane, Sealing Tape, and prefabricated Inside- and Outside corners.

As an alternative to the Subliner Dry sheet membrane system, there are several other options available to you

to create waterproofing for the bathroom floor and create a waterproof connection to the Ligno shower base:

(a) wedi Building Panels in 1/4 in. or 1/2 in. thickness can be used as the floor tile underlayment in place of cement

board and Subliner waterproofing. Ensure the Ligno base is raised enough from the subfloor so its perimeter channel

bottom is flush with the subfloor surface and so that the wedi Building Panels can safely connect inton the channel.

The connection is sealed with a 1/2 in. bead of wedi joint sealant continuously applied in the channel connection, and

another wedi joint sealant application is made 2 in. wide on top of the seam and spread flat. All seams to wedi walls must

also be sealed internally with a 1/2 in. bead of continuously applied wedi Joint Sealant between parts in that transition,

and the seams are then covered with another 1/2 in. bead of wedi Joint Sealant which is spread flat over the seam

covering it 2 in. wide. Tiling may begin once thinset under wedi Subliner Dry or wedi Building Panels on floor has cured.

(b) 3/4 in. wedi Building Panels may also be used where the Fundo Ligno is not installed into a floor recess,

but on a standard subfloor. This panel matches the height of the base at its perimeter; the wedi Building

Panel here would be installed over the subfloor and connect with a Z notch channel connection, which

needs to be cut into the panel, to the Ligno’s perimeter channel. The connection is sealed with a 1/2

in. bead of wedi joint sealant continuously applied in the channel connection, and another wedi joint

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