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 metres. Despite their size, our XL and XXL building boards are light and easy to handle just like the classic wedi building boards. Big in Form. Bold in Quality. Easy in Every Way.

The blue XPS core is 100% waterproof and remains fully functional even after accidental damage.
abP*: building board butt joints can be bonded and 100% sealed in a single step by using wedi 610. Thanks to no further waterproofing being required, craftsmen benefit from increased security and a shorter tiling time.
The cementitious coating provides and excellent surface for tile and the embedded fibre mesh also absorbs tensile forces.
From 50mm thickness, wedi building boards are approved for use as a partition wall – they only need to be bonded on 2 sides, to the wall and floor without mechanical fixing being required.
All building board systems have great heat insulation properties, save energy costs and provide long-lasting protection against mould.

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
Sound insulation DIN EN ISO 140-3 (at board thickness of 12.5 mm)	Rw, P 23 dB
Fire behaviour EN 13501	E
Bending stress based on DIN 53293	3900 kPa (mean value)
Adhesive tensile strength	0,28 N/mm²
Weight: wedi building board (1250 x 600 x 4 mm) \| wedi building board XXL (2500 x 1200 x 50 mm)	2,7 Kg \|13,8 Kg
Linear coefficient of thermal expansion	0,017 mm/(mk)
Technical properties – Rigid foam
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
Associated modulus of elasticity EN 826	10 –18 N/mm²
Thermal conductivity EN 13164	0,036 W/mK
Tensile strength EN 1607	0,45 N/mm²
Shearing resistance EN 12090	0,2 N/mm²
Shear modulus EN 12090	7 N/mm²
Bulk density EN 1602	32 kg/m³
Resistance to water vapour diffusion(μ) EN 12086	100
Water absorption under long-term immersion EN 12087	≤ 1,5 Vol.-%
Capillar action	0
Linear coefficient of thermal expansion	0,07 mm/mK
Temperature limits	-50°C / +75°C
Fire behaviour EN 13501	E
Propellant gas, carbon dioxide, GWP value	1

Order no.	Designation	L x W x thickness
010000912	wedi building board XL 12,5 mm	2500 x 900 x 12,5 mm
010000920	wedi building board XL 20 mm	2500 x 900 x 20 mm
010000930	wedi building board XL 30 mm	2500 x 900 x 30 mm
010000950	wedi building board XL 50 mm	2500 x 900 x 50 mm
010000999	wedi building board XL 100 mm	2600 x 900 x 100 mm
010729410	wedi building board XXL 10 mm	2500 x 1200 x 10 mm
010001220	wedi building board XXL 20 mm	2500 x 1200 x 20 mm
010001230	wedi building board XXL 30 mm	2500 x 1200 x 30 mm
010001250	wedi building board XXL 50 mm	2500 x 1200 x 50 mm
010001610	wedi building board XXL 10 mm	2600 x 1200 x 10 mm
010001612	wedi building board XXL 12,5 mm	2600 x 1200 x 12,5 mm
010001620	wedi building board XXL 20 mm	2600 x 1200 x 20 mm
010001281	wedi building board XXL 80 mm	2600 x 1200 x 80 mm
010001299	wedi building board XXL 100 mm	2600 x 1200 x 100 mm

Top Wall

Fundo Integro
Fundo Plano
Fundo Primo
Fundo Ligno Plus
Fundo Borgo
Fundo Trollo
Fundo Nautilo
wedi Solso
Fundo Plano Linea
Fundo Riolito Neo
Fundo Riolito
Fundo RioLigno
Fundo Riofino
Fundo Discreto
Building board
Vapor building board
Construct building board
PreLine building board
Sanwell shower wall module
Sanwell wall elements
Sanwell niches
Mensolo L and U angle unit
Bathboard bath and shower tray cladding
I-Board and I-Board Plus WC dry wall installation cladding
wedi Subliner Dry
Subliner Dry and Flex
Subliner Flex
Sanbath Wave bathtub
Sanoasa floating bench
Sanoasa bench 1-4
Sanoasa corner seat element
Sanoasa Comoda
Sanoasa Bellina
Sanoasa loungers

wedi 320 universal tile adhesive
wedi 360 flexible medium-bed mortar
wedi 610 adhesive sealant
wedi 620 sealant
wedi Tools wall sealing set
wedi Tools sealing tape, corners and sealing gaiters
wedi Tools joint reinforcement tape
wedi Tools cut-resistant tape
wedi Tools washer
wedi Tools metal dowel
wedi Tools cavity dowels set
wedi Tools fixings set

Downloads

abP building board and Fundo with Ardex X77

abP building board and Fundo with Mapei

abP building board and Fundo with PCI

abP building board and Fundo with Sakret

abP building board and Fundo with Schoenox

abP building board and Fundo with wedi 320

abP wedi 520

Application guidelines wedi building boards - wall and floor apllications

Building Board DIN EN 13501-1 Klasse E MPA - fire behaviour classification

Building board XL 100 mm, 2600 x 900 x 100 mm

wedi certificate BBA building boards

Brochure - Modular construction

Brochure - Tips and tricks for wall solutions

DOP Declaration of performance - wedi construction panel / Fundo sealing system

ETA test certificate

Flyer Freestanding partitions up to 180 cm

M1 emissions classification for building materials

Certificat - GEV EMICODE for wedi 610 Joint Sealant

Certificate VOC-regulation

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

Certificate ISO 50.001 - Energy management system (valid from 2022-2025)

ISO 9001:2015 certificate

Usage

XL and XXL building boards stand out because of their exceptional width up to 1.20m. This means they are not only ideal for use as freestanding walls, but also reduce the number of joints and simplify installation enormously.
The XL and 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. Big in Form. Bold in Quality. Easy in Every Way.

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 board XL and XXL