11mm OSB3 Sterling Board OSB Sheet
Description
11mm OSB3 Sterling Board is a versatile engineered wood panel for construction, roofing, flooring, wall sheathing, timber-frame work, sheds, workshops, site hoarding and general building applications. OSB3 is manufactured as a load-bearing board for use in humid conditions and provides a practical alternative to plywood for many construction applications.
11mm OSB3 at a glance
- Thickness: 11mm
- Board type: OSB3 / Oriented Strand Board
- Standard: EN 300 OSB3 classification
- Use: Load-bearing applications in humid conditions, subject to design and installation requirements
- Sheet sizes: Available from smaller cut panels through to 2440 × 1220mm sheets
- Applications: Roofing, flooring, wall sheathing, timber framing, sheds and general construction
- Collection: Leicester LE3
- Delivery: UK delivery available
What is 11mm OSB3?
OSB stands for Oriented Strand Board. Unlike plywood, which is manufactured from layers of timber veneer, OSB is made from engineered wood strands arranged in controlled orientations and bonded together under heat and pressure.
This construction produces a consistent sheet material with useful strength, stiffness and dimensional stability. The orientation of the strands also gives OSB directional mechanical properties, which can be important when the board is used for structural applications.
OSB3 is classified under EN 300 as a load-bearing board for use in humid conditions. It is widely used in UK construction for floors, roofs, walls and timber-frame sheathing.
OSB3 is designed for humid service conditions, but this does not mean that untreated OSB3 is permanently waterproof. The finished construction, edge protection, covering, drainage and exposure conditions all affect long-term performance.
11mm OSB3 board sizes
11mm OSB3 is available in a wide selection of sheet sizes, from smaller handy panels through to full 8 × 4ft sheets. This makes it suitable for both smaller repairs and larger construction projects.
| Sheet size | Approximate imperial size | Typical applications |
|---|---|---|
| 305 × 305mm | 1 × 1ft | Repairs, small panels and test pieces |
| 610 × 610mm | 2 × 2ft | Small projects and repairs |
| 1220 × 610mm | 4 × 2ft | Smaller floors, walls and general building work |
| 1830 × 1220mm | 6 × 4ft | Construction and larger panels |
| 2440 × 1220mm | 8 × 4ft | Full-size construction sheets |
A range of additional cut sizes may also be available. Please check the individual size option for the exact dimensions and availability.
Common uses for 11mm OSB3
11mm OSB3 can be used across a wide range of construction and building applications where its thickness and declared performance are appropriate.
- Roof sheathing
- Roof decking
- Wall sheathing
- Timber-frame construction
- Flooring applications
- Garden sheds
- Workshops
- Site hoarding
- Temporary construction panels
- Crates and packaging
- Racking and shelving
- Exhibition and display structures
- General building and DIY projects
11mm OSB3 for roofing
OSB3 is commonly used as a structural sheet in pitched roof and timber-frame construction. Its engineered strand construction provides a consistent panel suitable for applications where sheet stiffness, fixing and dimensional stability are important.
The correct thickness for a roof depends on factors including rafter or truss spacing, span, imposed loading, wind loading, fixing pattern and the complete roof construction.
Do not select 11mm OSB3 for a structural roof solely because it is labelled OSB3. The required thickness and product specification should be established from the project design.
11mm OSB3 for flooring
OSB3 is widely used as a structural flooring material, particularly in timber-frame construction and other applications where sheet panels are fixed over joists or a supporting framework.
Flooring performance depends on joist spacing, span, loading, board orientation, support and fixing. The manufacturer's technical data and project requirements should therefore be checked before selecting the thickness.
11mm OSB3 for wall sheathing
OSB3 can be used as a sheathing board in timber-frame and other construction systems where its structural properties are suitable for the design.
OSB sheathing can provide a continuous panel surface and may contribute to the performance of a timber-frame wall system. The actual structural role depends on the complete wall build-up, panel orientation, fixing pattern and design calculations.
OSB3 versus plywood
OSB3 and plywood are both engineered wood-based panels, but they are manufactured differently and should not be treated as identical materials.
| Feature | 11mm OSB3 | Plywood |
|---|---|---|
| Construction | Oriented wood strands | Cross-laminated timber veneers |
| Structural use | Suitable products can be load-bearing | Suitable grades can be structural |
| Moisture classification | OSB3 is designed for humid conditions | Depends on plywood grade |
| Surface | Functional engineered surface | Available in a wide range of face grades |
| Typical applications | Roofing, floors, walls and construction | Construction, joinery, furniture, vehicles and specialist applications |
Looking for another sheet material? Browse our plywood or MDF ranges.
How many 11mm OSB3 sheets do I need?
Working out your sheet requirements before ordering can help reduce waste and make it easier to choose the most suitable board size.
Enter your project dimensions into our Sheet Material Calculator to estimate how many sheets you need and compare available sheet sizes. You can also allow for cutting waste when planning your project.
Use the calculator before ordering to estimate your sheet requirements and help choose the most suitable 11mm OSB3 size.
OSB3 technical information
OSB3 is classified under EN 300 as a load-bearing board for use in humid conditions. Mechanical properties vary between manufacturers and individual products.
For structural applications, always refer to the manufacturer's current technical documentation and use the appropriate structural design information for the project.
Is 11mm OSB3 waterproof?
No. OSB3 is designed for use in humid conditions, but it should not be described as permanently waterproof.
Where OSB3 is exposed to moisture, the construction should be designed to control water exposure and protect vulnerable edges and joints. External applications may require suitable covering, treatment or other protection.
Is 11mm OSB3 suitable for outside use?
OSB3 is intended for humid service conditions, but permanent external exposure requires appropriate protection and construction detailing. It should not simply be left exposed to prolonged weathering.
Is 11mm OSB3 suitable for flooring?
OSB3 is widely used for structural flooring, but whether 11mm is suitable depends on joist spacing, span, loading, board orientation, fixing and the manufacturer's declared performance.
Is 11mm OSB3 suitable for roofing?
OSB3 is widely used for roof sheathing and decking. However, the required thickness depends on the roof design, support spacing, loading and fixing specification. Always check the project requirements before selecting 11mm OSB3.
Why choose 11mm OSB3?
- Engineered construction for consistent panel performance
- Suitable for load-bearing applications when correctly specified
- Designed for humid conditions under the OSB3 classification
- Available in full-size 2440 × 1220mm sheets and smaller cut sizes
- Suitable for roofing, flooring and wall sheathing applications
- Useful for sheds, workshops and general construction
- Available in smaller panels where a full sheet is unnecessary
- Practical alternative to plywood for suitable applications
Ordering 11mm OSB3 from Plywood Etc
We offer 11mm OSB3 in a wide selection of sheet sizes, from smaller panels through to full 2440 × 1220mm sheets. This allows you to select a board size that suits your project rather than automatically purchasing full sheets.
Collection is available from our Leicester LE3 location, with UK delivery available depending on the size of the order and delivery location.
If you're unsure whether 11mm OSB3 is the right thickness or material for your project, check the required span, loading, fixing and environmental conditions before ordering. For structural applications, the project specification and manufacturer's technical data should take priority.
Standard shipping
Estimated delivery time: 1-6 days depending on size & location
Collection available from Leicester LE3
Ready to collect within 24 hours
11mm OSB3 Sterling Board is a versatile engineered wood panel for construction, roofing, flooring, wall sheathing, timber-frame work, sheds, workshops, site hoarding and general building applications. OSB3 is manufactured as a load-bearing board for use in humid conditions and provides a practical alternative to plywood for many construction applications.
11mm OSB3 at a glance
- Thickness: 11mm
- Board type: OSB3 / Oriented Strand Board
- Standard: EN 300 OSB3 classification
- Use: Load-bearing applications in humid conditions, subject to design and installation requirements
- Sheet sizes: Available from smaller cut panels through to 2440 × 1220mm sheets
- Applications: Roofing, flooring, wall sheathing, timber framing, sheds and general construction
- Collection: Leicester LE3
- Delivery: UK delivery available
What is 11mm OSB3?
OSB stands for Oriented Strand Board. Unlike plywood, which is manufactured from layers of timber veneer, OSB is made from engineered wood strands arranged in controlled orientations and bonded together under heat and pressure.
This construction produces a consistent sheet material with useful strength, stiffness and dimensional stability. The orientation of the strands also gives OSB directional mechanical properties, which can be important when the board is used for structural applications.
OSB3 is classified under EN 300 as a load-bearing board for use in humid conditions. It is widely used in UK construction for floors, roofs, walls and timber-frame sheathing.
OSB3 is designed for humid service conditions, but this does not mean that untreated OSB3 is permanently waterproof. The finished construction, edge protection, covering, drainage and exposure conditions all affect long-term performance.
11mm OSB3 board sizes
11mm OSB3 is available in a wide selection of sheet sizes, from smaller handy panels through to full 8 × 4ft sheets. This makes it suitable for both smaller repairs and larger construction projects.
| Sheet size | Approximate imperial size | Typical applications |
|---|---|---|
| 305 × 305mm | 1 × 1ft | Repairs, small panels and test pieces |
| 610 × 610mm | 2 × 2ft | Small projects and repairs |
| 1220 × 610mm | 4 × 2ft | Smaller floors, walls and general building work |
| 1830 × 1220mm | 6 × 4ft | Construction and larger panels |
| 2440 × 1220mm | 8 × 4ft | Full-size construction sheets |
A range of additional cut sizes may also be available. Please check the individual size option for the exact dimensions and availability.
Common uses for 11mm OSB3
11mm OSB3 can be used across a wide range of construction and building applications where its thickness and declared performance are appropriate.
- Roof sheathing
- Roof decking
- Wall sheathing
- Timber-frame construction
- Flooring applications
- Garden sheds
- Workshops
- Site hoarding
- Temporary construction panels
- Crates and packaging
- Racking and shelving
- Exhibition and display structures
- General building and DIY projects
11mm OSB3 for roofing
OSB3 is commonly used as a structural sheet in pitched roof and timber-frame construction. Its engineered strand construction provides a consistent panel suitable for applications where sheet stiffness, fixing and dimensional stability are important.
The correct thickness for a roof depends on factors including rafter or truss spacing, span, imposed loading, wind loading, fixing pattern and the complete roof construction.
Do not select 11mm OSB3 for a structural roof solely because it is labelled OSB3. The required thickness and product specification should be established from the project design.
11mm OSB3 for flooring
OSB3 is widely used as a structural flooring material, particularly in timber-frame construction and other applications where sheet panels are fixed over joists or a supporting framework.
Flooring performance depends on joist spacing, span, loading, board orientation, support and fixing. The manufacturer's technical data and project requirements should therefore be checked before selecting the thickness.
11mm OSB3 for wall sheathing
OSB3 can be used as a sheathing board in timber-frame and other construction systems where its structural properties are suitable for the design.
OSB sheathing can provide a continuous panel surface and may contribute to the performance of a timber-frame wall system. The actual structural role depends on the complete wall build-up, panel orientation, fixing pattern and design calculations.
OSB3 versus plywood
OSB3 and plywood are both engineered wood-based panels, but they are manufactured differently and should not be treated as identical materials.
| Feature | 11mm OSB3 | Plywood |
|---|---|---|
| Construction | Oriented wood strands | Cross-laminated timber veneers |
| Structural use | Suitable products can be load-bearing | Suitable grades can be structural |
| Moisture classification | OSB3 is designed for humid conditions | Depends on plywood grade |
| Surface | Functional engineered surface | Available in a wide range of face grades |
| Typical applications | Roofing, floors, walls and construction | Construction, joinery, furniture, vehicles and specialist applications |
Looking for another sheet material? Browse our plywood or MDF ranges.
How many 11mm OSB3 sheets do I need?
Working out your sheet requirements before ordering can help reduce waste and make it easier to choose the most suitable board size.
Enter your project dimensions into our Sheet Material Calculator to estimate how many sheets you need and compare available sheet sizes. You can also allow for cutting waste when planning your project.
Use the calculator before ordering to estimate your sheet requirements and help choose the most suitable 11mm OSB3 size.
OSB3 technical information
OSB3 is classified under EN 300 as a load-bearing board for use in humid conditions. Mechanical properties vary between manufacturers and individual products.
For structural applications, always refer to the manufacturer's current technical documentation and use the appropriate structural design information for the project.
Is 11mm OSB3 waterproof?
No. OSB3 is designed for use in humid conditions, but it should not be described as permanently waterproof.
Where OSB3 is exposed to moisture, the construction should be designed to control water exposure and protect vulnerable edges and joints. External applications may require suitable covering, treatment or other protection.
Is 11mm OSB3 suitable for outside use?
OSB3 is intended for humid service conditions, but permanent external exposure requires appropriate protection and construction detailing. It should not simply be left exposed to prolonged weathering.
Is 11mm OSB3 suitable for flooring?
OSB3 is widely used for structural flooring, but whether 11mm is suitable depends on joist spacing, span, loading, board orientation, fixing and the manufacturer's declared performance.
Is 11mm OSB3 suitable for roofing?
OSB3 is widely used for roof sheathing and decking. However, the required thickness depends on the roof design, support spacing, loading and fixing specification. Always check the project requirements before selecting 11mm OSB3.
Why choose 11mm OSB3?
- Engineered construction for consistent panel performance
- Suitable for load-bearing applications when correctly specified
- Designed for humid conditions under the OSB3 classification
- Available in full-size 2440 × 1220mm sheets and smaller cut sizes
- Suitable for roofing, flooring and wall sheathing applications
- Useful for sheds, workshops and general construction
- Available in smaller panels where a full sheet is unnecessary
- Practical alternative to plywood for suitable applications
Ordering 11mm OSB3 from Plywood Etc
We offer 11mm OSB3 in a wide selection of sheet sizes, from smaller panels through to full 2440 × 1220mm sheets. This allows you to select a board size that suits your project rather than automatically purchasing full sheets.
Collection is available from our Leicester LE3 location, with UK delivery available depending on the size of the order and delivery location.
If you're unsure whether 11mm OSB3 is the right thickness or material for your project, check the required span, loading, fixing and environmental conditions before ordering. For structural applications, the project specification and manufacturer's technical data should take priority.
Can’t Find What You Need?
We have access to all sheet materials across the UK — our friendly sales team will track it down for you. Get in touch today and we’ll make sure you get exactly what you need.