OSB Boards

OSB, short for “Oriented Strand Board”, is a type of engineered wood board created using small strands of wood that are compacted together with an adhesive to create a sturdy and moisture-resistant board ideal for use in flooring and sheds. It has a similar appearance to chipboard, however if you look closely you will notice that typically the strands of wood are longer - this, compared with a more strategic placement of the strands, forms a stronger and sturdier board. It is usually available in a standard size of 1200mm x 2400mm or 8x4.

Uncompromising Structural Integrity Our OSB boards offer exceptional strength-to-weight ratios that outperform traditional alternatives. Each sheet undergoes rigorous quality control, ensuring consistent performance across every application from roof decking to floor substrates.

Moisture Resistance That Works British weather demands materials that can handle challenging conditions. Our premium OSB3 grades feature advanced resin technology, providing superior moisture resistance that protects your investment long-term. Whether you're tackling external applications or areas prone to humidity, these boards maintain their structural integrity when it matters most.

Precision Engineering for Perfect Results Every OSB board in our collection features precision-engineered edges and consistent thickness tolerances, ensuring seamless installation and professional finish. The oriented strand construction creates predictable performance characteristics, making load calculations straightforward for structural applications.

OSB if often used in the boarding of lofts to allow installation of loft insulation below it, between the roof joists, and a stable surface to walk on a use for storage. As it has some water resistance, it is ideal for use in sheds to create work benches or partitions, and also has a modern finish that looks great in shop fittings and studios, as well as for wall sheathing in timber homes, and floor underlay in construction projects.

Structural Flooring Solutions Transform your flooring project with OSB boards specifically designed for subflooring applications. Our 18mm option provides the load-bearing capacity needed for residential and commercial installations, whilst the tongue-and-groove profiles ensure tight joints that eliminate squeaks and movement.

Roofing and Wall Sheathing Whether you're constructing new buildings or renovating existing structures, our OSB sheets offer reliable weather protection and structural support. The consistent manufacturing process ensures each board delivers predictable performance, crucial for meeting building regulations and warranty requirements.

Interior Construction Projects From partition walls to built-in furniture, OSB boards provide versatile solutions for countless interior applications. The smooth, consistent surface accepts a wide range of finishes, whilst the inherent strength allows for creative design freedom.

Selecting the correct OSB grade ensures optimal performance for your specific application. Our technical team understands the nuances between OSB2, OSB3, and OSB4 classifications, helping you choose boards that meet both structural requirements and budget considerations.

Load-bearing applications typically require OSB3 minimum specification, providing the moisture resistance and structural capacity needed for floors, walls, and roof applications. For more demanding environments, OSB4 offers enhanced performance characteristics suitable for heavy-duty structural use.

Our commitment extends far beyond simply stocking materials. We maintain comprehensive inventory levels, ensuring your projects progress without delay. Each OSB board sheet undergoes careful handling and storage, arriving at your site in perfect condition, ready for immediate installation.

Technical Support When You Need It Complex projects demand expert guidance. Our experienced team provides detailed specification advice, helping you navigate building regulations whilst optimising material selection for cost-effectiveness and performance.

Competitive Pricing Without Compromise We negotiate directly with manufacturers, securing exceptional pricing that we pass directly to our customers. This approach ensures you receive premium-quality OSB boards at prices that protect your project margins.

Yes, OSB is a strong, engineered structural panel with excellent shear strength (often better than plywood in this area) and good load-bearing capacity. It performs reliably in applications like roofing, wall sheathing, and subflooring, with uniform strength and no voids or soft spots. While plywood may edge it out slightly in some bending or fastener-holding scenarios, OSB is widely recognised as equivalent or superior for many structural uses.

Yes, OSB is commonly used and well-suited for shed walls, especially as sheathing or interior lining. It provides great rigidity, strength against racking, and value for money. For best results, use moisture-resistant grades (like OSB3), protect exposed edges from direct weather, and pair it with proper fixings like woodscrews or nails for secure installation. Many sheds use it successfully for both framing support and cladding base.

Yes, OSB is safe and commonly walked on when used as subflooring, attic flooring, or shed/garage floors — especially in thicker grades like 18mm (≈3/4"). It handles foot traffic and moderate loads well when properly supported (e.g., joists at 400–600mm centres). For occasional access or storage, it's fine; just ensure good ventilation underneath to avoid moisture issues, and consider sealing or covering it for heavy or frequent use.