wedi Building Board – Lightweight, waterproof XPS board for any bathroom
The wedi Building Board is the essential XPS foundation for creating a 100% waterproof and long-lasting bathroom installation. Lightweight, strong, thermally insulating and ready to tile, it allows you to build walls, floors or furniture elements quickly and safely. Available in thicknesses from 4 mm to 100 mm and, thanks to one of the largest stocks in the Netherlands, almost always delivered quickly.
➕ 100% waterproof – no additional sealing required
➕ Lightweight and easy to cut to size
➕ Ready to tile without extra preparation
➕ Thermally insulating and dimensionally stable
➕ Available in all common thicknesses (4–100 mm)
➕ Suitable for floors, walls, ceilings and creative solutions
Technical specifications
- Material: extruded polystyrene (XPS), closed-cell structure
- Surface finish: double-sided mortar layer, fibre-reinforced
- Application: floors, walls, niches, partition walls, ceilings
- Thicknesses: 4 mm to 100 mm
- Sizes: multiple dimensions in stock – usually available for fast delivery
- Water absorption: 0%
- Thermal conductivity: approx. 0.036 W/mK
- Fire classification: E (EN 13501-1)
All possibilities with wedi Building Boards
With the wedi Building Board you can build quickly, cleanly and flexibly. From levelling floors to creating walls, niches, furniture elements or complete shower areas: with just a utility knife and wedi 610 adhesive you can easily create a strong, waterproof base for any wet room.
wedi Building Board – the professional foundation for waterproof, durable and creative bathroom construction
The wedi Building Board is the core element of the complete wedi system. With its strong XPS core, double-sided mortar coating and fibre-reinforced surface, each board forms a 100% waterproof, stable and ready-to-tile base. Whether used for walls, floors, ceilings or bespoke shapes, the board offers maximum design freedom with minimal installation time. Available in thicknesses from 4 mm to 100 mm and, thanks to one of the largest stocks in the Netherlands, almost always available for fast delivery.
Waterproof, dimensionally stable and ready for tiling
The blue-core XPS board is completely waterproof and absorbs no moisture. It provides a safe, durable and deformation-resistant base that remains stable for many years. With wedi 610, joints are sealed watertight, allowing the surface to be tiled immediately. The board prevents cold wall surfaces, improves thermal comfort and meets the highest technical requirements for wet rooms.
The right thickness for every application – including free-standing walls
Every Building Board is designed for versatile use. Thin versions from 4–6 mm are ideal for renovation and levelling old substrates. From 12.5–20 mm, robust wall and floor constructions can be created. And from 50 mm upwards, you can even build free-standing walls without heavy construction methods. This gives wedi unrivalled design flexibility combined with fast, clean installation.
- Suitable for walls, floors, ceilings and custom-built structures
- Thicknesses from 4 mm to 100 mm – including self-supporting wall elements from 50 mm
- No minimum thickness required for floor installations
- Thermally insulating, waterproof and extremely dimensionally stable
- Perfect in combination with underfloor heating thanks to low heat transfer to the substrate
Fast, clean installation for professionals and DIY users
The wedi Building Board is lightweight and easy to work with, requiring only a utility knife. Bonding is done with wedi 610; additional fixing can be achieved with washers and screws. As there are no waiting times for drying or curing, you immediately create a reliable, stable surface. The result: faster installation with maximum security.
- Cut to size with a utility knife – no dust, no noise
- Bond with wedi 610 for ultra-fast installation
- No drying time when using wedi 610
- Suitable for almost any load-bearing substrate
- Perfectly flat and immediately ready for tiling or plastering
Design freedom for niches, benches, bespoke elements and curved shapes
The Building Board is the most versatile component in modern bathroom construction. The boards can be bent, bonded and built into almost any desired form: niches, seating elements, bath surrounds, furniture structures, skirting details or even sculptural shapes. With a complete range of complementary components – such as mounting blocks for securely fixing shower doors – every detail can be realised with precision and guaranteed waterproofing.
- Ideal for niches, benches, wellness features and custom furniture
- Bendable for organic or curved designs
- Compatible with wedi Fundo shower trays and wedi Top design surfaces
- Mounting blocks available for safe installation of shower doors and hardware
Specifications
| Manufacturer | wedi |
| Product name | wedi Building Board |
| Type | XPS base board for wet rooms |
| Application | Walls, floors, ceilings, niches, furniture, free-standing walls |
| Thickness | 4–100 mm |
| Dimensions | Largest stock in the Netherlands – fast delivery |
| Material | Extruded polystyrene (XPS) with mortar surface |
| Water absorption | 0% – fully waterproof |
| Thermal conductivity | approx. 0.036 W/mK |
| Fire rating | E (EN 13501-1) |
| Suitable for | Tiles, cement-based plaster, natural stone |
| Not suitable for | Very heavy rolling loads without additional measures |
The foundation of the complete wedi system
The wedi Building Board is more than just a board: it is the structural foundation of a fully waterproof, modular and technically reliable bathroom system. Combine Building Boards with wedi Fundo shower elements, wedi Top design finishes, wedi Tools, benches and niches to create a complete solution that installs quickly and maintains its quality for many years.
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