Wedi Board (Waterproof Mosaic Substrate)

Create strong, durable, and long-lasting mosaics with Wedi Board, a lightweight, waterproof building board that has become a favourite substrate among professional mosaic artists. Constructed from a rigid extruded polystyrene (XPS) core reinforced on both sides with a cement-coated fibreglass mesh, wedi Board provides an exceptionally stable surface with excellent adhesion for mosaic adhesives and mortars. Unlike wood, it will not swell or warp when exposed to moisture, making it ideal for both indoor and outdoor mosaic projects. Easy to cut with a craft knife or handsaw, the board can be shaped into custom designs, allowing artists to create everything from wall panels and signs to sculptural pieces and decorative installations. Its lightweight construction also makes it much easier to handle and hang than traditional cement boards while remaining rigid and durable. Perfect for: Glass, ceramic and porcelain mosaics Indoor and outdoor mosaic artwork Wall-mounted mosaic panels Garden art and decorative signs Custom-shaped mosaic projects Mixed media artwork Key Features Lightweight yet exceptionally rigid 100% waterproof Excellent bonding surface for mosaic adhesives Easy to cut and shape Resistant to warping and moisture damage Suitable for interior and exterior use Available in a range of thicknesses to suit different projects Whether you're creating your first mosaic or producing large professional commissions, wedi Board provides a reliable, long-lasting foundation that lets your artwork shine.