18mm OSB3 Board 2440x1220mm | Heavy-Duty Moisture-Resistant Square Edge Structural Sheet for Walls, Floors & Roofs

Buy 18mm Square Edge OSB3 Board 2440x1220mm – Structural, Load-Bearing & Affordable

At Wel Timber & Building Supplies, we supply 18mm Square Edge OSB3 Boards – strong, versatile and designed to perform in demanding conditions, all at everyday low trade prices.

Manufactured to EN 300 performance standards, this load-bearing wood base sheet is perfect for both structural and non-structural projects. Its moisture-resistant design makes it ideal for humid environments, delivering reliable performance in walls, floors, roofs, sheds, hoardings, and sarking applications.

Key Benefits of 18mm OSB3 Board

High Structural Strength – excellent load-bearing capacity, a proven alternative to plywood

Moisture Resistant – suitable for internal and external use in humid conditions

Smooth & Knotless Surface – ready for use without sanding, even in GRP roofing systems

Easy to Work With – drill, nail, saw, file or sand with ease

Durable & Reliable – built to last, conforming to EN 300 standards

Cost-Effective – strong performance at a fraction of the price of other sheet materials

Common Applications

✔ Wall sheathing for timber frame buildings
✔ Flooring & roofing boards
✔ Roof decking & sarking
✔ Site hoarding & temporary works
✔ GRP roofing base layer
✔ Garden sheds, workshops & outbuildings
✔ Interior decorative projects

Why Choose Wel Timber?

We’re proud to supply top-quality OSB3 boards at trade prices every day. With large stock availability, we can supply single sheets or bulk loads, ready for collection in Kings Langley or fast delivery across London, Hertfordshire & the South East.

Order 18mm OSB3 Square Edge Board Today

Strong, versatile, and cost-effective – our 18mm OSB3 boards are the smart choice for builders, roofers, landscapers, and DIY renovators. Buy today from Wel Timber & Building Supplies and benefit from quality products at the right price.

📞 Call: 01923 264880
✉️ Email: sales@welbm.co.uk

🌐 Order Online: www.welbm.co.uk

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