The ultimate sub-surface substrate
“wedi” building board is a surface carrier and adhesive substrate for applying stone, tile, laminate and other materials onto. Highly customisable, lightweight, durable and waterproof wedi allows design dreams come true.
Wedi building boards have a blue core made from CFC-free extruded polystyrene rigid foam. The rigid foam is reinforced with glass fibre (with alkali-resistant finish) on both sides and coated with a polymer-modified cement. This makes the wedi building board an ideal base substrate for any type of laminate, plaster, tile or stone surface. Wedi building boards can be applied to practically any substrate, are waterproof, insulating, versatile, light and robust.
The blue XPS core is 100% waterproof and remains fully functional even after possible damage. ABP building board butt joints can be sealed 100% simply by using Wedi 610, as no other seal is necessary, craftsmen benefit from increased security accompanied by a shorter tiling time.
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.
Technical data of building board
| 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) |
2,7 Kg |
| wedi building board XXL (2500 x 1200 x 50 mm) |
13,8 Kg |
| Linear coefficient of thermal expansion |
0,02 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 |