6 Reviews

5
View Product Reviews

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

URN: 4003005
£10.83ex. VAT £7.63 per m2
£10.83ex. VAT
£7.63 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

18mm OSB 3 Tongue & Groove Flooring Board is a premium roofing and flooring panel specified for load-bearing applications as well as sheathing materials on walls, floors and ceilings.

Nationwide Delivery

Wed 24 Apr

Order within 35hrs

Delivery & Returns Info
Make 3 payments of £3.61 with PayPal Learn more
Klarna available at checkout. Learn more

Product Overview

18mm OSB 3 Tongue & Groove Flooring Board is a premium roofing and flooring panel specified for load-bearing applications as well as sheathing materials on walls, floors and ceilings.

URN: 4003005
£10.83ex. VAT

Pay in 30 days

Apply for trade credit

Trade account


Register for trade prices

Delivery & Returns Information

All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.

Standard (Nationwide) Delivery

Timber & Sheet, Building Materials, Doors & Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £35 ex. VAT
Between £100 - £300 ex. VAT £20 ex. VAT
Over £300 ex. VAT FREE
Insulation, Plasterboard and Drylining Products
ORDER VALUE DELIVERY CHARGE
Under £150 ex. VAT £50 ex. VAT
Between £150 - £400 ex. VAT £35 ex. VAT
Over £400 ex. VAT FREE
SuperFOIL and YBS products
ORDER VALUE DELIVERY CHARGE
Each item £10 ex. VAT
Over £350 ex. VAT of 1 brand FREE
Screws & Fixings and Adhesives & Sealants
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £7.50 ex. VAT
Over £100 ex. VAT FREE
Thermafleece CosyWool Roll & SupaSoft Insulation
QUANTITY DELIVERY CHARGE
1 £30 ex. VAT
2 £60 ex. VAT
3 to 12 £70 ex. VAT
13 to 24 £140 ex. VAT
25 to 36 £210 ex. VAT
37 to 48 £280 ex. VAT
49 to 60 £350 ex. VAT
61+ £420 ex. VAT
Thermafleece CosyWool Slab, Thermafleece UltraWool & Thermafleece NatraHemp
QUANTITY DELIVERY CHARGE
1 £30 ex. VAT
2 £60 ex. VAT
3 to 4 £70 ex. VAT
5 to 8 £140 ex. VAT
9 to 12 £210 ex. VAT
13 to 16 £280 ex. VAT
17 to 20 £350 ex. VAT
21+ £420 ex. VAT
Block Pavers
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £17.50 ex. VAT
Between £100 - £200 ex. VAT £30.50 ex. VAT
Between £200 - £900 ex. VAT £105 ex. VAT
Over £900 ex. VAT FREE
Artificial Grass
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £12 ex. VAT
Between £100 - £200 ex. VAT £16.50 ex. VAT
Over £200 ex. VAT £22 ex. VAT

Express Delivery

Express Delivery - Insulation and Plasterboard & Drylining
ORDER VALUE DELIVERY CHARGE
Under £300 ex. VAT £50 ex. VAT
Over £300 ex. VAT £35 ex. VAT
Express Delivery - Timber & Sheet, Building Materials, Doors & Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £300 ex. VAT £50 ex. VAT
Over £300 ex. VAT £35 ex. VAT

This charge is based on delivery to mainland UK excluding the Scottish Highlands. If your delivery address is in the Scottish Highlands a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.

View Full Delivery Policy

Returns

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

View Full Returns Policy

Key Features

  • Use in a variety of structural applications
  • Versatile and moisture resistant
  • Superb load-bearing properties
  • Durable building board
  • BBA approved
  • Cost-effective alternative to plywood

Technical Specification

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

Colour and finish are representative only and may vary slightly as this is a natural product.

What Is 18mm OSB3 Tongue and Groove? 

In environments where most interior laminate sheet materials would falter, 18mm OSB3 Tongue and Groove (T&G) demonstrates superior performance and resilience. 

18mm OSB T&G board – also known as sterling board – is an extremely versatile engineered wood sheet material.

Specifically engineered for use in humid conditions, OSB T&G 18mm lives up to its name by comprising 'oriented strands' - a composition of wood fibres and adhesives compressed in opposing orientations to create a panel with exceptional load-bearing capabilities.

OSB T&G 18mm exhibits performance characteristics similar to those of softwood plywood building materials, including comparable flexibility and strength. 

A notable attribute of OSB T&G 18mm is its durable tongue and groove profile. Precision-engineered edges allow the boards to interlock seamlessly, ensuring a perfect alignment with adjacent panels. 

This design feature renders 18mm OSB T&G particularly suitable for use in platform floors, load-bearing roofs, flooring, wall applications, and ceilings.

Furthermore, the inherent water resistance of 18mm OSB T&G makes it an excellent choice for use in areas prone to humidity.


Where Is 18mm OSB T&G Flooring Board Used? 

Precision engineered for use in a majority of load-bearing applications, contractors rely on 18mm OSB T&G as a premium roofing and flooring panel. It can also be used as sheathing materials on walls, floors and ceilings. 

We recommend using 18mm OSB T&G for structural use in the following applications:

  • Wall sheathing
  • Roofing and flooring applications
  • Signboards
  • Furniture and concealment applications


OSB T&G 18mm Flooring Board Key Features

  • Relatively easily sealed against the elements - suitable for interior or exterior structural applications
  • Precision engineered tongued and grooved board
  • Edges machined to the finest tolerance for a snug and secure fit
  • A reliable structural panel for house building and structural roofing
  • Suitable for humid conditions - (Service Class 1 & 2)
  • Superb load-bearing properties
  • Durable building board
  • BBA approved
  • Standard finished thickness of 18mm
  • Cost-effective alternative to plywood


OSB T&G 18mm - Tongue & Groove Explained

OSB T&G 18mm boards comprise a ‘tongue’ edge with a precisely engineered gap ‘groove’. 

When installing the boards, this tongue edge slots perfectly into the groove, making the installation process a breeze. 

For additional security, the boards can also be glued or bound with screws or nails ( a method often referred to as ‘secret nailing’).


Using OSB T&G 18mm in Humid Conditions

Thanks to the resin binders and wax involved in its manufacturing process, OSB sheet material is tolerant to both moisture and humidity. 

Strips and flakes of wood are layered with an adhesive resin and then hot-pressed into a panel. This strength lends itself to OSB3's performative superiority over its sister board OSB2. 

While Class 2 OSB can only be used for non-load-bearing applications in dry conditions, 18mm OSB3 can be used for structural, load-bearing uses in humid conditions in housing applications. The boards are edge-coated with a proprietary water-resistant sealer to lessen the chances of edge swelling.

Despite this being the case, it is always a good idea to add further weather protection if you are planning to use it for permanent outdoor use.

You can do this by adding weather-proof exterior paint. Follow the exterior paint with a wood waterproofing sealant. Allow 12-14 hours for it to dry before installing it - you can add a second coat if required.

Customer Reviews

5
4
3
2
1
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

Leave a Review

Related Articles

OSB or Chipboard For Loft Flooring?

How To Board A Loft

A Comprehensive Guide to Painting OSB

How To Waterproof OSB Board: UK Specific Guide

Is OSB Stronger Than Plywood? An Examination

All Categories

Services