OSB Board in Standard Sizes and Thicknesses

High-quality OSB board supplied for construction, flooring and structural applications. We stock OSB sterling board in standard OSB sheet sizes, providing a consistent and cost-effective alternative to plywood for site work.

Available in popular thicknesses and suitable for trade, refurbishment and new build projects.

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OSB Board for Construction Use

OSB board is widely used across construction due to its strength, consistency and ease of installation. It is commonly chosen for flooring, wall sheathing, roofing and structural applications where predictable performance and material costs need to be controlled.

Our OSB sterling board is suitable for load-bearing use and performs well in environments where moisture resistance is required, making it a practical choice for modern building projects.

OSB Sheet Sizes and Thickness Options

Choosing the correct board size and thickness is important for structural performance and suitability on site. Supreme Merchants supply OSB board in standard OSB sheet sizes of 2440mm x 1220mm (8×4), which are easy to handle and widely specified across the industry.

Our OSB board is available in:

  • 9mm OSB board: Suitable for lightweight and non-structural applications.
  • 11mm OSB board: Commonly used for wall and roof sheathing.
  • 18mm OSB board: Ideal for flooring, decking, and structural use.

OSB Sterling Board Grade

We supply OSB sterling board manufactured to OSB3 specification, suitable for load-bearing applications and use in humid conditions. This makes it appropriate for most construction and renovation projects where strength and durability are required.

OSB3 sterling boards are commonly used where plywood might otherwise be specified, offering a more cost-effective alternative without compromising performance.

Common Uses for OSB Board

OSB board is commonly used for:

  • Subfloors and flooring systems
  • Wall and roof sheathing
  • Structural panels
  • Mezzanine floors
  • Hoarding, signage and temporary works

Its consistent performance and availability in standard sizes make it a practical choice for both permanent and temporary applications.

Why Buy OSB Board from Supreme Merchants?

When buying OSB board, availability, sizing and delivery matter. Supreme Merchants supply OSB board that is ready for site use, with clear specifications and reliable lead times.

We offer free UK delivery on orders over £125. For larger quantities or repeat orders, our team can assist with bulk pricing and supply planning. Contact Supreme Merchants for more information and support.

OSB Board FAQs

What size OSB board do you sell?

We supply standard OSB sheet sizes of 2440mm x 1220mm (8×4).

Which OSB thickness should I choose?

Thickness depends on the application. 9mm is suitable for lighter use, 11mm for sheathing, and 18mm for flooring and structural applications.

Is OSB sterling board suitable for structural use?

Yes. OSB sterling board manufactured to OSB3 grade is suitable for load-bearing and structural applications.

Do you deliver OSB board nationwide?

Yes. We offer UK-wide delivery, with free delivery available on orders over £125.