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OSB 3
OSB 3 is oriented strand board for load-bearing use in humid conditions. It combines strength and stiffness with good dimensional stability, and works with ordinary woodworking tools.
Used for walls, floors, roofs, staircases and hoarding, and inside for furniture frames, door panels and decorative cladding.
In stock: 9 mm, 12 mm, 15 mm and 18 mm, 2440 × 1220 mm.
Image: Kronospan
Key data
Thickness and properties
Load-bearing OSB 3 for humid conditions, to EN 300. Values are Kronospan minimums per thickness range. Density over 580 kg/m³.
OSB 3
9 mm
2440 × 1220 mm
| Bending strength, length | ≥ 22 N/mm² |
| Bending strength, width | ≥ 11 N/mm² |
| Internal bond | ≥ 0.34 N/mm² |
| Internal bond after boil test | 0.15 N/mm² |
| Swelling in thickness, 24 h | ≤ 15 % |
Kronospan values for the 6 to 10 mm range
OSB 3
12 mm
2440 × 1220 mm
| Bending strength, length | ≥ 20 N/mm² |
| Bending strength, width | ≥ 10 N/mm² |
| Internal bond | ≥ 0.32 N/mm² |
| Internal bond after boil test | 0.13 N/mm² |
| Swelling in thickness, 24 h | ≤ 15 % |
Kronospan values for the >10 to <18 mm range
OSB 3
15 mm
2440 × 1220 mm
| Bending strength, length | ≥ 20 N/mm² |
| Bending strength, width | ≥ 10 N/mm² |
| Internal bond | ≥ 0.32 N/mm² |
| Internal bond after boil test | 0.13 N/mm² |
| Swelling in thickness, 24 h | ≤ 15 % |
Kronospan values for the >10 to <18 mm range
OSB 3
18 mm
2440 × 1220 mm
| Bending strength, length | ≥ 18 N/mm² |
| Bending strength, width | ≥ 9 N/mm² |
| Internal bond | ≥ 0.30 N/mm² |
| Internal bond after boil test | 0.12 N/mm² |
| Swelling in thickness, 24 h | ≤ 15 % |
Kronospan values for the 18 to 25 mm range
All thicknesses
| Density | over 580 kg/m³ | Kronospan |
| Modulus of elasticity, length / width | ≥ 3500 / ≥ 1400 N/mm² | EN 310 |
| Thickness tolerance | ± 0.8 mm | EN 324-1 |
| Length and width tolerance | ± 3.0 mm | EN 324-1 |
| Edge straightness | ± 1.5 mm/m | EN 324-2 |
| Squareness | 2.0 mm/m | EN 324-2 |
| Moisture content | 2 to 12 % | EN 322 |
| Formaldehyde release | ≤ 0.03 ppm | EN 717-1 |
| Formaldehyde content | ≤ 2 mg/100 g | EN 12460-5 |
Source: Kronospan technical sheet FT 805, OSB 3, revision 1, 20 January 2023; density from Kronospan OSB presentation. Consult your design engineer for loads and spans.
Why OSB
Advantages of OSB
Source: Kronospan OSB presentation.
OSB 3 board and use
OSB 3, straight edge. Three-layer board with oriented strands, 2440 × 1220 mm
Roof and wall sheathing on a timber-frame house
Images: Kronospan OSB Full Range catalogue.
Characteristics
Standard
EN 300 – type OSB 3; EN 13501-1 class D-s1, d0; EN 13986
Emission class
E1 (EN ISO 12460-5)
Characteristics
- Increased resistance to humid conditions
- High load-bearing capacity and stiffness
- High dimensional accuracy and shape stability
- Flexible and impact resistant
- Easy to work with standard tools
- Recyclable
Applications
- Walls, floors, roofs and staircases
- Site hoarding
- Furniture frames and door panels
- Interior cladding and partitions
Sizes in stock
- 9 mm × 2440 × 1220 mm
- 12 mm × 2440 × 1220 mm
- 15 mm × 2440 × 1220 mm
- 18 mm × 2440 × 1220 mm
Downloads
OSB Full Range catalogue (PDF · 3.4 MB)
BIM objects (Revit and IFC)
- Kronobuild OSB 3 square edge (NBS Source)
Specification documents
- Declaration of performance, OSB 3 (NBS Source)
BIM objects and documents are hosted by NBS Source and kept up to date by Kronospan. They follow the UK specification; check sizes with us. NBS may ask you to sign in (free) to download.
Ready to order OSB 3?
Send us the decor code, thickness and quantity. Lagos, Abuja and Port Harcourt.