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 XL / XXL – Large format building boards

Product information

wedi building boards have a blue core made from CFC-free extruded polystyrene rigid foam. This makes the wedi building board an ideal basis for any type of plaster and tile. wedi building boards can be applied to practically any substrate, they are waterproof, insulating, versatile, light and robust.

These large building boards stand out because of their distinctive width of up to 1.20 m. This means that the XXL building boards are easy assembly with all the benefits of the classic wedi building board such as being light and easy to handle, despite their size. Simple to assemble and big in quality.

The blue XPS core is 100% waterproof and remains fully functional even after possible damage.
The cemented surface is a good adhesive under-surface. The fibre fabric also absorbs tensile forces.
All building board systems have great heat insulation properties,

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

Technical Details

Technical data of building board XL & XXL
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
010729410	wedi building board XXL 10 mm	2600 x 1200 x 10 mm
010001612	wedi building board XXL 12,7 mm	2600 x 1200 x 12,7 mm
010001220	wedi building board XXL 20 mm	2600 x 1200 x 20 mm
010001250	wedi building board XXL 50 mm	2600 x 1200 x 50 mm
010001612	wedi building board XXL 12,5 mm	2500 x 1200 x 12,5 mm

Fundo Primo
Fundo Ligno
Fundo Riolito Neo
Fundo Riolito
Building board
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

Usage

XXL building boards stand out because of their exceptional width up to 1.20 m. The XXL building boards bring together all the benefits of classic wedi building boards and are also particularly light and easy to handle, despite their size. Simple to assemble and big in quality.

Installation & Application

Freestanding Wall Solution with wedi XL and XXL Building Panels

Get a clear overview of the possible applications for wedi XL and XXL building panels. The content covers both professional installation on walls, floors, and ceilings for various substrates, wet areas, and heating systems, as well as special solutions for freestanding, sturdy wall structures using the large-format building panels.

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

Freestanding wall solution Installing the building board

FAQ

Frequently asked questions about the building board

wedi building boards XXL