Fixing and buying guide
Sterling OSB Type 3 board 2440mm x 1220mm x 18mm
What this product is for
Sterling OSB Type 3 is a structural board suitable for load-bearing applications across a range of building elements. The 18mm thickness makes it particularly suitable for flooring systems, roof decking, and wall sheathing where strength and stability are required. Type 3 classification means it performs reliably in humid conditions, making it appropriate for kitchens, bathrooms, and external applications where moisture exposure is a concern.
- Flooring substrates and joist systems
- Roof decking and attic platforms
- Wall sheathing and bracing
- Humid and damp environments
Sizing and pack contents
Each board measures 2440mm x 1220mm with a thickness of 18mm. This is a single board purchase. The large format minimises joints and reduces waste on typical construction projects. Check your project dimensions carefully to confirm this size suits your application, particularly for flooring spans and roof rafter spacing.
- Single board per order
- 2440mm length x 1220mm width x 18mm thick
- Covers approximately 2.98 square metres per board
Before you buy and install
Confirm that your structural design and building regulations permit OSB for your specific application. Check joist or rafter spacing to ensure 18mm thickness is adequate for your load requirements. Allow the board to acclimatise to site conditions for 48 hours before fixing, particularly in variable humidity. Ensure the supporting structure is level, dry, and capable of supporting the board weight. Store boards flat and protected from weather until installation.
- Verify structural design requirements for your application
- Check joist or rafter spacing compatibility
- Allow acclimatisation time on site before fixing
- Ensure supporting structure is level and dry
- Protect from weather during storage
Machining and fixing
Sterling OSB Type 3 is precision-engineered for easy machining, allowing straightforward cutting, drilling, and shaping on site with standard tools. Fix using corrosion-resistant fasteners appropriate to your application, such as ring-shank nails or screws for flooring, or galvanised fixings for external roof decking. Space fixings according to your structural design and building regulations, typically around 150mm to 300mm centres depending on load.
- Easy to machine with standard carpentry tools
- Use corrosion-resistant fasteners
- Follow structural design for fixing spacing
- Seal cut edges in humid applications