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18mm OSB 3 Tongue & Groove Flooring Board 2400mm x 590mm (8' x 2')

URN: 4003005
Core
£11.88ex. VAT £8.37 per m2 Get it for £11.35 ex. VAT with CORE+
£11.88ex. VAT
£8.37 per m2
Coverage required
m
m
Based on your total area of m2 (inc. 10% wastage) - of these are required (actual coverage of m2)

We recommend purchasing at least 10% extra product to allow for errors, damages or obstacles

Structural OSB 3 board with tongue-and-groove edges for secure fit. Suitable for load-bearing flooring in humid conditions. Strong joint design minimises movement, ensuring a stable, durable surface after installation.

Nationwide Delivery

Wed 17 Sep

Order by Monday at 2pm
  • 2days
  • 4hrs
  • 36mins
  • 3secs

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Product Overview

Structural OSB 3 board with tongue-and-groove edges for secure fit. Suitable for load-bearing flooring in humid conditions. Strong joint design minimises movement, ensuring a stable, durable surface after installation.

URN: 4003005
£11.88ex. VAT

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

Core Products
Core
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 £100 £15 ex. VAT
Between £100 - £300 ex. VAT £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 - Insulation and Plasterboard & Drylining
ORDER VALUE DELIVERY CHARGE
Under £400 £50 ex. VAT
Over £400 ex. VAT £35 ex. VAT
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

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Returns

We offer a 30 day returns policy on any faulty products.

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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

Technical Specification
Bond Class:BS EN300
Thickness:18mm
Width:590mm
Length:2400mm
Sales Unit:Sheet
Sales Unit Coverage:1.42m2
Weight:15.28kg
Application:Floors & roofs
Edge:Tongue & Groove
Country of Origin:Latvia
Grade:OSB3
Wood Species:Pine / Spruce
Formaldehyde Level:E1 (low)

Product Overview

18mm OSB3 tongue-and-groove flooring board, measuring 2400mm x 590mm (8' x 2'). 

Each board is manufactured from strands of softwood arranged in cross-oriented layers, bonded with moisture-resistant resin, and hot-pressed to form a dense, structural panel with excellent strength and stability. 

The tongue-and-groove edges are precision-machined to ensure a tight interlock between boards, helping to minimise deflection, reduce squeaks, and produce a flush, even surface ready for direct coverings. 

With its OSB3 classification, the panel is designed for load-bearing use in both dry (Service Class 1) and humid (Service Class 2) conditions, making it a dependable choice for flooring, flat or pitched roofing, and wall sheathing where durability and moisture resistance are critical.

Features & Benefits

  • OSB3 classification: Suitable for structural, load-bearing use in humid service conditions (Service Class 1 & 2).
  • Engineered from oriented wood strands with resin binders: Provides resistance to rot, fungal decay, and swelling.
  • Tongue-and-groove edge profile: Ensures secure jointing, reduces movement, and creates a flush surface.
  • Smooth, uniform surface: Suitable for direct coverings or secondary finishes.
  • Workable timber panel: Can be cut, screwed, nailed, or glued using standard tools.
  • Board length 2400mm (8ft): Designed for rapid installation across joists or rafters.
  • Thickness 18mm, width 590mm: Provides reliable structural strength with manageable handling.


Please Note: Colour and finish are representative only and may vary slightly as this is a natural timber-based product. Additional weatherproofing is recommended if used externally for prolonged exposure.

Applications

  • Can be used with flooring systems: Suitable for platform floors in residential or commercial projects.
  • Roof decking: Reliable choice for structural roof build-ups in humid service conditions.
  • Wall sheathing: Provides racking strength and structural stability in timber frame construction.
  • Furniture and fit-out use: Can be adapted for non-structural purposes such as signboards, furniture, or concealment panels.

Installation Guidance

  • Tongue-and-groove jointing: Boards slot securely together; edges may also be glued for added stability.
  • Fixing method: Panels can be screwed or nailed directly to joists or rafters; secret nailing is recommended for a flush finish.
  • Moisture protection: For permanent external use, apply exterior paint and a waterproofing sealant, allowing full drying before installation.

Compliance & Performance

  • Preservative treatment / classification: OSB3 manufactured with waterproof adhesives and edge-sealed for resistance to swelling in humid environments.
  • Service class: Classified for use in Service Class 1 (dry) and Service Class 2 (humid) applications in line with BS EN 300.



Customer Reviews

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5/5 based on 6 reviews

These were used in a roofing project. Really happy the boards and the whole buying experience.

Jack H on

Boards were all in good nick, thanks

Pete Hall on

Delivered to my site on time. 5 star service.

Kris W on

The boards were really easy to install and fit together

Gary T on

The customer team were so friendly and made sure I got it delivered when I needed them

Kate Butler on

Great price and easy to lay.

Martin Chivers on

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