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View Product Reviews18mm Structural OSB 3 Sterling Board 2440mm x 1220mm (8' x 4')
| 10+ sheets | 20+ sheets | 55+ sheets |
| £17.40ex. VAT | £17.22ex. VAT | £16.69ex. VAT |
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Mon 22 Sep
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Tue 23 Sep
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- 16hrs
- 50mins
- 15secs
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Product Overview
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
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Core Products Core
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|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 ex. VAT | £20 ex. VAT |
| Over £300 ex. VAT | FREE |
Core Delivery charges apply only when all products in an order that have equivalents are accepted as such. If even one product cannot be substituted with an equivalent, the entire order will not qualify for Core Delivery charges.
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
| Insulation, Plasterboard and Drylining Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
| Express Delivery - Insulation and Plasterboard & Drylining | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{foundation}} Used in a variety of structural applications
- {{water_drop}} Offers load-bearing performance in humid conditions
- {{workspace_premium}} Manufactured to EN 300 performance standards
- {{verified_user}} BBA approved
Technical Specification
| Bond Class: | BS EN300 |
|---|---|
| Thickness: | 18mm |
| Width: | 1220mm |
| Length: | 2440mm |
| Sales Unit: | Sheet |
| Sales Unit Coverage: | 2.98m2 |
| Weight: | 28kg |
| Application: | Roofs & walls |
| Edge: | Square |
| Country of Origin: | Latvia |
| Grade: | OSB3 |
| Wood Species: | Pine / Spruce |
| Formaldehyde Level: | E1 (low) |
Product Overview
Structural OSB 3 Sterling board, measuring 2440mm x 1220mm (8' x 4') with an 18mm thickness.
Engineered from cross-laminated softwood strands and bonded with resin under heat and pressure, it delivers consistent strength and stability without knots or voids.
Certified to EN 300 OSB 3 for load-bearing performance in humid conditions, it serves as a practical and cost-effective alternative to plywood for many structural applications such as heavy flooring, robust roofing, and demanding joinery or construction work.
Features & Benefits
- Structural classification: OSB 3 certified to EN 300, for load-bearing use in humid conditions.
- BBA approved: Permits use in a wide range of commercial and domestic projects.
- Void-free construction: Consistent strength with no knots or core gaps.
- Cross-strand stability: Resists warping, splitting, and expansion.
- Moisture performance: Reliable in humid environments, unlike OSB 2 (dry-use only).
- Workability: Easy to cut, drill, nail, and sand with standard tools.
- Board size 2440mm x 1220mm: Compatible with UK framing centres for straightforward fixing on standard stud/joist spacing.
- Thickness 18mm: Heavy-duty board for flooring, roofing, and high-load applications.
Please Note: Colour and finish are representative only and may vary slightly as this is a natural product.
Applications
- Heavy flooring: Provides strength for domestic and commercial floors.
- Roof decking: Robust panels for long-term roof performance.
- Wall sheathing: Adds rigidity and resistance to timber frames.
- Site hoardings: Strong and moisture-resistant for secure barriers.
- High-load structures: Suitable for platforms, staging, and demanding builds.
- DIY and carpentry: Ideal for benches, shelving, and heavy joinery projects.
Installation Guidance
- Seal cut edges when exposed: Prevents moisture ingress.
- Use correct fixings: Galvanised or stainless fasteners recommended.
- Install on 600mm or 400mm centres: Ensures secure fixing and structural support.
- Add exterior protection if required: Apply paint or sealant for permanent outdoor use.
Compliance & Performance
- Standard: EN 300 OSB 3, for structural use in humid conditions.
- Certification: BBA approved.
- Bonding: Resin-bonded, hot-pressed layers for durability.
- Veneer quality: Free from knots and voids.
Customer Reviews
I used these in a shed build. The boards were level and delivered to me on time.
Really pleased with the quality of these boards
The service from Ciara was amazing from start to finish
All boards arrived in good condition, and the price was cheap.
Arrived on time and I would recommend them to anyone
I'd recommend Materials Market. I had a positive experience, bought at good prices and the boards were a good spec.
Managed to order these on short notice and I was really impressed with the quality of the boards. I'll be ordering from them again
I ordered these for my carpenter, the service was great - a big thank you to Ciara for arranging my order.
Great service and good quality boards that arrived, really happy all round
The boards arrived in a good condition. I used them in a shop for a big flooring project I had.
great for sub-floors
good
Great price, and my dog loves the new bed I made using it.
great
excellent
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