OSB3 Board | OSB3 Boards | Sterling Board

Oriented Strand Board 3 (OSB3) is a highly versatile and durable engineered wood panel, ideal for various structural and non-structural applications in construction and DIY projects. At Build4Less, our OSB3 Board category encompasses a range of sizes and thicknesses to meet the diverse needs of our customers.

What Is an OSB3 Board?

OSB3 (Oriented Strand Board) is a strong, engineered sheet material manufactured from layers of wood strands bonded with moisture-resistant resins. Graded to BS EN 300 – OSB/3, it is specifically designed for load-bearing applications in humid environments, making it the ideal alternative to plywood for structural walls, roofs, and floors.

Product Types and Uses

OSB3 Tongue & Groove Boards: These boards, available in dimensions like 1200mm x 600mm x 18mm, feature interlocking edges that make them perfect for flooring applications. They provide a stable and continuous surface, minimising squeaks and improving the floor's strength.

Standard OSB3 Boards - Various Sizes: Ranging from smaller sizes (e.g., 2397mm x 1196mm x 9mm) to larger panels (e.g., 2440mm x 1220mm x 18mm), these boards are incredibly adaptable. Use them for roofing, wall sheathing, packaging, and hoardings. The varying thicknesses (from 9mm to 18mm) offer flexibility in terms of strength and weight, catering to different structural requirements.

Selecting the Right Board

For Structural Uses: Opt for thicker boards (15mm-18mm), such as the OSB3 Boards 2440mm x 1220mm x 18mm, when structural integrity is paramount, like in flooring, roofing, and load-bearing walls.

For Non-Structural Uses: Thinner boards (9mm-11mm), like the OSB3 Boards 2397mm x 1196mm x 9mm, are suitable for interior applications, packaging, and decorative purposes where strength is less of a concern.

 Benefits of OSB3 Boards

• Structural Strength – High load-bearing capacity and excellent racking resistance.
• Moisture Resistance – Designed for Service Class 2 (humid) conditions; suitable for roofs and walls protected from the weather.
• Consistent Quality – Uniform density and no knots or voids, ensuring predictable performance.
• Sustainable & Certified – Typically FSC® certified and low-emission (E1) for eco-friendly building.
• Easy to Work With – Cuts, drills and fixes with standard woodworking tools.

Applications of OSB3 Boards

• OSB3 Board used in Roof Decking/Sarking beneath tiles or slates.
• OSB3 Board used in Timber Frame Wall Sheathing for extra rigidity.
• OSB3 Board used in Floor Decking (especially with 18 mm T&G panels).
• OSB3 Board is used in Site Hoarding & Temporary Works where strength and durability are required.
• OSB3 Board is used in Packaging, Furniture & Shopfitting, where a stable, cost-effective sheet is needed.

Installation Tips

• Condition & Acclimatise: Store flat, dry and off the ground; allow boards to adjust to site conditions before fixing.
• Expansion Gaps: Leave ~3 mm between square-edge sheets and ~10 mm around perimeters.
• Fixings: Use ring-shank nails or wood screws at 150 mm centres on supported edges and 300 mm in the field.
• T&G Panels: Glue joints for extra rigidity and a squeak-free floor.
• Weather Protection: Protect promptly after installation; temporary exposure is acceptable, but prolonged wetting is not.

Why Choose Build4Less?

• Wide Range & Sizes – From 9 mm sheets to 18 mm T&G, always competitively priced.
• Trusted Brands – Sourced from leading UK manufacturers with full certification.
• Fast Nationwide Delivery – Reliable, next-day or scheduled service across the UK.
• Expert Support – Our team provides product advice and technical guidance to help you choose the right OSB3 board for your project.
• Value & Quality – Strong trade relationships mean you get premium boards at excellent prices.