15 Reviews
View Product Reviews18mm Structural OSB 3 Sterling Board 2440mm x 1220mm (8' x 4')
Coverage required
Express Delivery
Tue 15 Jul
Standard Delivery
Wed 16 Jul
- 1days
- 5hrs
- 7mins
- 36secs
Learn more
Pay in 3 interest-free payments
Split your purchase of £16.89 into 3 with no sign-up fees or late fees.
£5.63
today
£5.63
1 month
£5.63
2 months
How it works
- Choose PayPal at checkout to pay later with Pay in 3.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Pay in 3 is a form of credit, so carefully consider whether the purchase is affordable and how you will make the repayments. Be aware of the possible impact of using Pay in 3 and of missing payments, including making other borrowing more difficult or more expensive. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Available for purchases of £30 to £2,000. Terms and conditions apply. PayPal Pay in 3 is a trading name of PayPal (Europe) S.à r.l. et Cie, S.C.A. 22-24 Boulevard Royal L-2449, Luxembourg.
Learn more
Buy now. Pay with Klarna at your own pace.
Get what you need for your next project, choose how you pay.
Pay in 30 days
£16.89
Pay in full
Klarna's Pay in 30 days is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
Pay over time
£5.63
Every 30 days
Pay in 3
£5.63
today
£5.63
in 30 days
£5.63
in 60 days
Klarna's Pay in 3 is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
How it works
- At checkout select Klarna.
- Choose your payment plan.
- Different payment plans may be shown depending on the purchase amount and credit score.
- Complete your checkout.
- The amount will be charged based on the payment plan you chose.
Learn more
Pay in 4 interest-free payments
Split your purchase of £16.89 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
£4.22
today
£4.22
second payment
£4.22
third payment
£4.22
fourth payment
How it works
- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/en-GB
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
Product Overview
Frequently Bought With
.jpg)
+-+Photo.jpg)
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.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, CF, DD, DG, KW, IV, LD, LL, NP, PH, SA and SY. If your delivery address is in any of these postcode areas 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.
Standard (Nationwide) Delivery
|
Core Products Core
|
|
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 ex. VAT | £25 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 | £20 ex. VAT |
| Between £100 - £250 ex. VAT | £15 ex. VAT |
| Over £250 ex. VAT | FREE |
| Insulation, Plasterboard and Drylining Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £150 | £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 | £7.50 ex. VAT |
| Over £100 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}} Use in a variety of structural applications
- {{water_drop}} Versatile and moisture resistant
- {{construction}} Used extensively in renovation work and new projects
- {{keyboard_arrow_right}} Stronger than chipboard products and non-structural plywoods
- {{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) |
Colour and finish are representative only and may vary slightly as this is a natural product.
What Is 18mm OSB?
18mm OSB 3 is a precision-engineered board manufactured by bonding multiple layers of cross-oriented wood strands with a moisture-resistant resin under high heat and pressure. This process creates a structurally robust panel with exceptional dimensional stability and load-bearing capacity.
Its 'OSB 3' designation, defined by the BS EN 300 standard, confirms its suitability for load-bearing use in humid conditions. This makes it an ideal material for structural sub-flooring, where its strength supports heavy loads, and as roof decking, where its rigidity spans rafters while resisting ambient moisture.
Its cross-oriented build provides the racking strength required for wall sheathing in timber-frame construction, preventing twisting under wind load. The board's durability also makes it a reliable choice for secure site hoarding, capable of withstanding prolonged exposure to the elements.
Applications
18mm OSB 3 is a versatile panel for demanding projects. Its load-bearing capacity and moisture-resistant properties make it the ideal choice for a wide range of interior and exterior structural applications.
Recommended Applications:
- Structural Work: The industry standard for roofing, flooring, and wall sheathing, where rigidity and strength are essential.
- Garden Buildings: Creates robust and weather-resistant floors, walls, and roofs for sheds, workshops, and summer houses.
- Commercial & Retail Fit-Outs: Suitable for building heavy-duty shelving, racking, and exhibition stands designed to support significant weight.
- Site Hoarding: A durable and secure solution for long-term projects, capable of withstanding prolonged exposure to the elements.
Benefits
- Easy to drill, nail, file and sand
- Suitable for interior and exterior applications
- BBA classification permits use in a wide range of commercial and domestic situations
- Used extensively in renovation work and new projects
- Stronger than chipboard products and non-structural plywoods
- Manufactured to EN 300 performance standards
- BBA approved
- Standard boards have consistent dimensions of 2440 x 1220 (or 8ft x 4ft)
Moisture Resistance
18mm OSB 3 is engineered to offer superior performance in humid environments, setting it apart from interior-grade panels like MDF or the dry-condition-only OSB 2.
However, it is important to distinguish that "moisture-resistant" does not mean waterproof. For permanent outdoor installations where the board will be exposed to the elements, applying additional protection is essential.
To waterproof the board effectively, coat it with a quality exterior paint followed by a wood waterproofing sealant. Allow 12-24 hours for the first coat to dry completely before installing the board or applying a second coat if needed.
OSB Meaning
'OSB' stands for Oriented Strand Board, a name that directly reflects its composition. The 18mm OSB panel is engineered by compressing layers of oriented wood strands together with a high-performance adhesive resin.
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
Leave a Review
Related Articles
How To Fibreglass a Roof
OSB or Chipboard For Loft Flooring?
A Comprehensive Guide to Painting OSB
How To Waterproof OSB Board: UK Specific Guide
Is OSB Stronger Than Plywood? An Examination
