Spanholz

Spanholz is a term used in some German-speaking regions to describe engineered wood panels composed of wood strands bonded with a resin adhesive and pressed into flat boards. The term is closely related to oriented strand board (OSB) and, depending on the market, may be used interchangeably with OSB or to describe OSB-like products. Regional usage can vary, and exact specifications are defined by local standards.

Manufacture involves sizing and selection of wood strands, mixing them with a binder such as phenol‑formaldehyde or urea‑formaldehyde resins, and forming mats that are hot-pressed to cure the resin and fuse the strands into a rigid panel. Panels are produced in different thicknesses and densities, typically ranging from about 9 mm to 25 mm, with single or multi-layer strand orientations to optimize strength.

Spanholz panels offer a favorable strength-to-weight ratio and good stiffness for their thickness. They have relatively high shear strength and dimension stability compared with some plywood products, though their moisture resistance depends on the resin system and edge sealing. Edges and surfaces may require sealing or finishing for exposure to water or humidity.

Common uses include structural panels for walls, roofs, and floors, as well as components for furniture, cabinetry, and packaging where flat, rigid sheet material is needed. In practice, product specifications, adhesives, and certifications vary by producer and jurisdiction.

Historically, Spanholz emerged in the European market as a cost-effective alternative to plywood in the mid- to late 20th century. Users should consult local standards and supplier documentation to confirm properties and suitability for a given application.