Do wedi building boards meet the requirements for sound insulation? Are there differences in applications for floor and wall surfaces?

The wedi building board does not offer any special sound insulation. In the shower area, you can integrate our NonStep products to improve sound insulation under the Fundo shower elements.

My wedi building board has a damage to the mortar surface. Is it still waterproof?

If the damage only affects the cementitious coat, the building board remains waterproof. Because the wedi building board is waterproof due to its XPS core.

My wedi building board has become wet and now has white efflorescence. Can I still use them?

Yes, that's not a problem! White efflorescence is only a superficial appearance and does not affect the function of wedi building board.

How should a wedi building board be stored?

Regardless of thickness, the wedi building board should always be stored laid flat. They must be protected from direct sunlight and moisture.

Where can I find further data on the wedi building board, such as certifications, etc.?

We have compiled all available data in the download area.

What tile size can I use on wedi building boards on the wall?

There are basically no restrictions on the tile size on the wall, as long as the substrate is load-bearing and properly prepared. Make sure that the building boards as well as the tiles are installed properly. For further helpful information, please refer to the application guideline, which we have made available to you in the download area.

wedi building board – Ideal base for wall & floor cladding

Product information

wedi Building Boards have a blue core made from CFC- and HBCD free extruded polystyrene rigid foam. This makes wedi building boards an ideal base for any type of thinset adhered tile or stone. wedi building boards can be applied to practically any loadbearing substrate, are waterproof throughout, insulating, versatile in its use in field customised applications, light and extremely robust and strong. While often used within the range of wedi shower systems it is also a formidable tile backer board for use on walls, floors, countertops and many more applications.
Available in a wide variety of thicknesses and sizes, wedi building boards are compatible with virtually any stable substructure.

100 % waterproof blue core, made from CFC-free, HBCD-free extruded polystyrene closed cell foam

Available in multiple thicknesses and sizes

Compatible with virtually any stable substructure

Versatile, limitless installation capabilities

Strong, due to cement resin with embedded mesh reinforcement – no chance for delamination

Superior bond to any tile using any thinset mortars on cement or epoxy basis

Extremely light weight, easy and clean to cut

Includes thermal insulating properties

Protects against mould and mildew

Perfect, even surface for mosaics, as well as large size or thin body tile

Energy efficient

Excellent thermal insulation properties even at low thickness

Hygienic

Protection against mould and fungal growth

Proven

The original pioneers, successfully leading the way for 40 years

Reliable

100% waterproof from 3 mm thick XPS core

Fast

Balances uneven walls, directly tileable

What must be observed when preparing the substrate?

This content is provided by YouTube. By loading this content, you consent to the transfer of your data to YouTube / Google. You can find more information about this here: Google Privacy.

wedi EN | What needs to be taken in consideration while sealing a bathroom?

Technical Details

Technical data of building board
wedi Building Board Material Composition	XPS/ Extruded Polystyrene Foam Core covered with fiberglass mesh fully embedded in a cement based resin coating
Waterproofness of Assembled System Australia	CodeMark CM20134
Waterproofness of Assembled System New Zealand	CodeMark CM20221
Tensile Strenght (Thinset Mortar to wedi Coating to Foam (ASTM C297)	0.45 N/mm²
Shear Strenght (ANSI A118.10-1999) 28 day Shear Strength:	0.65 N/mm²
Shear Strenght (ANSI A118.10-1999) 84 day Shear Strength:	0.68 N/mm²
Shear Strenght (ANSI A118.10-1999) 100 day Shear Strength:	0.67 N/mm²
Capillarity	0
Flexural Strength (ASTM C947)	4.32 N/mm²
Robinson Floor Tester (ASTM C627)	Heavy duty commercial use, passed
Temperature Limits	-50 C to + 80 C
Long-term compressive strength (50 years) ≤ 2% compression EN 1606	0.08 N/mm²
Compressive resistance or compressive strength at 10% compression EN 826	0.25 N/mm²
Dynamic Impact Test (10 mm board attached to 450 mm timber studs NCC 1 Spec C1.8)	Passes
Max. hanging load when wedi is used on the ceiling*	88kg/m²
Max. hanging load when wedi is used on Timber Wall Studs**	113kg/m²
Fungus & Bacteria Resistance (ASTM G21)	No Growth, Passes
Drain Assembly Kit, WaterMark	Passes
Weight for Building Board (2500 × 1200 × 10 mm)	10.1 kg

* Consult with wedi on proper substrate preparation, tile and setting material choice to design for performance
** When fastened with wedi hardware/washers in accordance with wedi guidelines

Order no.	Designation	L x W x thickness
010000004	wedi building board 4 mm	1250 x 600 x 4 mm
010000006	wedi building board 6 mm	1250 x 600 x 6 mm
010000020	wedi building board 20 mm	2500 x 600 x 20 mm
010000050	wedi building board 50 mm	2500 x 600 x 50 mm

Start

Fundo Primo
Fundo Ligno
Fundo Riolito Neo
Fundo Riolito
Building board XL and XXL
Construct building board

Downloads

Sealing concept wedi Australia

Shower & Spa Systems Solutions

Technical datasheet and assembly instructions Building board standard (Feb. 2019)

wedi Shower Systems

Certificate - Environmental product declaration for wedi building board as per ISO 14025 and EN 15804

Certificate - Environmental product declaration for wedi Fundo as per ISO 14025 and EN 15804

Usage

The possibilities are endless when it comes to wall, floor not least because of the wide range of different thicknesses.
They can be applied to practically any type of substrate. Whether it's old tile coverings, adhesive or non-adhesive substrate, lush mounting onto existing plasterboard or dry lining. Thanks to the simplified processing, wedi building panels can handle all manner of challenges on the building site.
New Construction of Residential/Commercial use buildings
Renovation in Residential/Commercial use buildings
Wet areas such as showers and steam baths
Over wooden or concrete substructure

Installation & Application

Using wedi Building Panels Correctly – Walls, Floors, and Ceilings

Here you’ll find a clear overview of how to use wedi Building Panels on walls, floors, and ceilings. The content covers solutions for various substrates, special requirements in wet areas, and integration with wall and floor heating systems.

You can find all information on bonding, installation, and suitable applications here:

Installing the building board

FAQ

Frequently asked questions about the building board

wedi Building Board