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View Product Reviews15mm Structural OSB 3 Sterling Board 2440mm x 1220mm (8' x 4')
15mm Structural OSB 3 Sterling Board is a moisture-resistant, structural panel purposed for use in a variety of internal and external applications including roofs, floors and walls.
Product Overview
15mm Structural OSB 3 Sterling Board is a moisture-resistant, structural panel purposed for use in a variety of internal and external applications including roofs, floors and walls.
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 | |
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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 - £300 ex. VAT | £35 ex. VAT |
Over £300 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 |
Express Delivery
Express Delivery - Insulation and Plasterboard & Drylining | |
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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.
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- Use in a variety of structural applications
- Versatile and moisture resistant
- FSC/PEFC Certified
- Stronger than chipboard/non-structural plywood
- Manufactured to EN 300 performance standards
- BBA approved

Technical Specification
Thickness: | 15mm |
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Width: | 1220mm |
Length: | 2440mm |
Sales Unit: | Sheet |
Sales Unit Coverage: | 2.98m2 |
Certification: | FSC / PEFC |
What Is Structural 15mm OSB 3 Sterling Board?
Structural 15mm OSB 3 Sterling Board is a durable sheet material, renowned for its strength and versatility.
Crafted by compressing wood strands with adhesive under high pressure, 15mm OSB offers reliable performance and structural support in a variety of construction applications.
Where is Structural 15mm OSB 3 Board Used?
- Wall Sheathing: Provides structural support and insulation.
- Roofing: Suitable due to strength and moisture resistance.
- Flooring: Ideal for subflooring.
- Shelving: Perfect for creating sturdy shelves.
- Timber Frames: Used in constructing timber frames.
- Garden Sheds: Common material for shed construction.
- Exhibition Displays: Versatile and paintable for displays.
- Site Hoarding: Temporary hoarding for construction sites.
- Panelling: Used for interior and exterior panelling.
Structural 15mm OSB 3 Board Key Features & Benefits
- Strength and Durability: Engineered for strength and durability - high strength to weight ratio.
- Moisture Resistance: Suitable for humid conditions.
- Versatile: Applicable in various construction scenarios.
- Cost-Effective: Offers quality at a lower cost than plywood.
- Green Option: Produced from sustainable wood strands.
- Easy to Paint: Surface can be painted for customisation.
- Nail and Screw Holding: Securely holds nails and screws.
- Easy Installation: Simple to work with and cut to size
15mm OSB Board for Humid Conditions
Unlike MDF and other interior laminate sheet materials, 15mm OSB is able to hold its own in humid environments, making it ideal for house building.
While the OSB2 board is only suitable for dry conditions, OSB3 board can withstand more challenging conditions. While the boards are moisture resistant, this does not mean that the boards are completely waterproof.
As a rule of thumb we always suggest adding further weather protection if you plan 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 and allow 12-14 hours for it to dry before installing it - you can add a second coat if required.
OSB Meaning
The 'OSB' in its title (short for Oriented Strand Board) makes reference to its manufacturing process: which sees wood strands laid in specific orientations and compressed together with adhesive resin.
This manufacturing method ensures the resulting panel is strong and durable.