wedi Fundo Ligno Recess Kit Instruction Manual
- June 13, 2024
- wedi
Table of Contents
wedi Fundo Ligno Recess Kit
Product Information
The wedi Fundo Ligno Recess Installation Kit is designed for installing a shower system over wooden floors. It includes various components such as the Parallel Entry, Shower Pan End, Building Board, Joist Bracket, 5/8 Filler Plywood, Joists, and C Bracket. The kit also includes necessary screws for installation.
Included Components:
- Pancake head wood screws (drill bit included)
- Long flat head Phillips self-drilling screws with wings
- Short flat head Phillips self-drilling screws with wings
Not Included Components:
The following components are not included in the kit and must be provided separately:
- Subfloor boards
Installation Instructions
Before starting the installation, ensure that the floor structure is free of excessive deflection. The subfloor joist spacing should not exceed 16″ (406.4 mm). The Ligno Recess Kit is designed to work with 3/4″ (19 mm) Plywood/OSB subfloor boards. If using 5/8″ (15.9 mm) subfloor boards, wedi’s optional clips/shims kit is required.
Make sure the floor drain assembly below the floor is stabilized and supported properly. Only use wedi products (Building Panels, Curb, Joint Sealant, and Fasteners) for the installation of the wedi Fundo Shower System over a recessed floor designed using this product.
It is important to follow the instructions provided by wedi technical sales staff or have knowledge of proper installation methods. Additionally, adhere to applicable local, state, and national building codes.
Step 1: Mark and Remove Subfloor
Measure and mark the subfloor area that needs to be removed. Use a safe
saw, such as a sawzall or a Dremel (r) US40 01 120 V, to cut close to the
framing. Ensure a clean and safe cut.
Step 2: Install Floor Waste Pipe
Ensure that a 2″ (50.8 mm) floor waste pipe is installed and positioned to fit
the Ligno shower base drain. The pipe should be cut square and even at 5/8″
(15.9 mm) below the recessed subfloor top surface. Create a 6 1/2″ (165.1 mm)
cutout in the floor stripwith the drain pipe in the center. Ensure that the
drain and cutout do not interfere with a floor joist.
Step 3: Cut and Install Joist Brackets
Cut the joist brackets to match the length of the exposed floor joists.
Depending on the length and direction of the floor joists, additional shorter
joist brackets may be needed. Do not use joist brackets shorter than 12″
(304.8 mm) or with less than two mounting flanges.
Step 4: Install Joist Brackets
Install the joist brackets onto the floor joists using the supplied pancake
head wood screws. Place one screw per mounting flange in the center threaded
hole, unless using available threaded holes on the mounting flanges. The
brackets should be aligned with the top and sides of the floor joists, leaving
a 1/16″ (1.6 mm) space between the vertical side of the floor joist and the
metal bracket to mitigate wood movement and irregularities.
wedi Fundo Ligno Recess Installation Kit
A profile and bracket system for safe and fast installation of a recessed wood subfloor flush with conventional or engineered floor joists
When joists are parallel to the shower entry, the transition to recessed floor
needs to be placed on the front (the edge of a joist adjacent to the recessed
part) edge of floor joist regardless of placement. Sometimes the recess needs
to be extended past the intended shower pan. The space will be treated the
same as any recessed one but filled back in with 5/8″ (15.9 mm) thick plywood
up to the intended shower pan.
This Product is for use with wedi Fundo Ligno Shower System only. The Product
is tested and warranted exclusively for this use. Please do not use this
product to recess a subfloor and install any other shower or building
structure in such recess supported by this product. wedi Ligno Recess
Installation Kit has undergone thorough testing and passed Robinson Test C627
for floor assemblies.
Included
Not included
Must be provided
INSTRUCTION
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After recessing ensure floor structure is free of deflection in excess of L/360 prior to installing further components or product.
-
Do not exceed subfloor joist spacing of 16″ (406.4 mm) o.c. The Ligno
Recess Kit is designed to work with 3/4″ (19 mm) Plywood/OSB subfloor boards. To accommodate 5/8″ (15.9 mm) subfloor boards use wedi’s optional clips/shims kit.
Floor drain assembly below floor is stabilized, fixed and supported in position, and will not sink under water load. -
Only wedi products (Building Panels, Curb, Joint Sealant and Fasteners) are used for wed Fundo Shower System assembly over a recessed floor designed using this product.
-
Installer has received instructions from wed technical sales staff or is informed about proper installation methods as described.
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Follow applicable local, state and national building codes (e.g. IRC and ICC) when installing this product.
Measure and mark subfloor to be removed. Use a safe saw to cut close to the framing but also in a safe and clean way. wed recommends a combination of saws including a sawzall and a saw like Dremel (r) US40 01 120 V where a standard circular saw might not reach.
Make sure your 2″ (50.8 mm) floor waste pipe is installed and positioned to fit the Ligno shower base drain. The pipe is cut square and even at 5/8 in. (15.9 mm) below the recessed subfloor top surface. A 6 1/2″ (165.1 mm) cut out must be made into that floor strip with the drain pipe in its center. It is important to position the drain and cut out to not interfere with a floor joist.
Cut the joist brackets to the length of the exposed floor joists. Depending on length and direction of floor joists you may need to add a shorter joist bracket. Please do not use joist brackets shorter than 12″ (304.8 mm) or equipped with less than two (at least partial) mounting flanges.
Install the joist brackets to the floor joist using the pancake head wood screws provided by wedi. Set one (1) screw per each mounting flange in the center screw hole (unless bracket is cut which is when at minimum two mounting flanges must be fastened using available screw holes). Brackets should be aligned with top and side of floor joists but allowing for up to 1/8″ (3.2 mm) and minimum of 1/16″ (1.6 mm) of space between the floor joist’s vertical side and the metal bracket. This helps mitigating wood movement and irregularities in the floor joist itself without creating too much tension.
Fasten the next bracket on the other side of the floor joist. Stagger the tabs,so you may need to cut the brackets.
Repeat process shown under 4. and install joist brackets to all exposed joists.
All floor joists have been equipped with a joist bracket on both sides.
Place C brackets at the wall sides. The C brackets are installed at both ends of the recess area first and then along the wall/side every 12″ (304.8 mm) (center of C bracket to center of C bracket).
The C brackets are inserted with their claws between floor surface and un- derside of the base plate. Use a wood block or a hard rubber mallet to push C brackets into position.
Make sure the C Brackets are mounted in a level position (assuming a level base plate) and use flathead Phillips self-drilling screws with wings provided by wed. Fasten through the base plate and into the two (2) metal claws resting between base plate and wood floor top.
Install one (1) C bracket against the wall and centered between each pair of floor joists.
Dry fit C brackets to the edge of the wood floor to ensure C Brackets can be installed for full support along the edge of the floor plate. Use a wood block or hard rubber mallet to push the brackets in position.
Use flat head Phillips self-drilling screws with wings provided by wedi to fasten C brackets to the edge of the wood floor plate at the open side of the future shower area. Fit brackets between flanges of joist/wall brackets. Use two (screws) to fasten this bracket through the wood floor and into the lower claws.
All perimeters around the areas to be recessed are now equipped with support brackets.
Measure and mark to cut wood strips tightly fitting into the recess bracket support system between joists, wall framing and regular subfloor. Leave a 1/8“ (3.2 mm) gap between wood strips and brackets so the wood may move without creating too much tension.
Cut the wood floor strips incl. the strip for the drain area featuring a 6 1/2“ (165.1 mm) diameter hole to be seated over the center of the floor waste pipe.
Clean and degrease the bracket support flanges/surfaces and apply a 1/4“ (6.35
mm) bead of wedi joint sealant.
Use wedi joint sealant or a construction adhesive suitable for metal and wood
application.
Place all wood strips into position on brackets.
Secure wood strips to C and Joist brackets using flat head Phillips self- drilling screws with wings as provided by wedi. Fasten at minimum every 10 (ten) inches (254 mm) where joist brackets are present, or where C brackets are in line along the framed wall and parallel to the floor joists. Fasten wood into all other C brackets with a minimum of two (2) screws where singular C Brackets are mounted between floor joists on wall framing or wood floor transition side.
Install wedi Fundo Ligno in a bed of tile adhesive as per Ligno installation manual.
Your Ligno shower is now flush with the surrounding subfloor and is supported by a subfloor with absolute structural integrity, so important for safe tile installation and without the risk of cracks in tile or grout so typical to tile substrate installations or shower systems installed with insufficient support.
For installing the wedi Fundo Ligno Shower Base please have a look at the installation instructions in the packaging.
wedi Corporation
Tel. +1-847-357-9815
Fax. +1-847-357-9819
info@wedicorp.com
www.wedicorp.com
December 2022 wedi information and instruction is based on best knowledge and independent testing (UPC/IAPMO). wedi reserves the right to modify technical information and instructions.