OSB 3

OSB 3 Board (Oriented Strand Board Three）

Product ID: OSB 3-OSB 3 Board (Oriented Strand Board Three）

OSB 3 Board, also known as ‘Oriented Strand Board/3’ or ‘Moisture-Resistant Structural OSB Board’, is a high-performance load-bearing engineered wood panel designed for humid environments. It is manufactured by bonding multiple layers of wood strands in specific orientations using adhesive (Phenolic/MDI Glue) under high temperature and pressure.

Compared to OSB 1 and OSB 2, it offers superior strength and durability, load-bearing capacity, dimensional stability, and moisture resistance. It is commonly employed in construction projects within damp conditions, such as roof decking, wall sheathing, flooring, subflooring, I-joist webs, site hoarding, and formwork.

Features ＆ Advantages

♦Excellent moisture resistance

♦Widely used in multiple scenarios

♦Stable and reliable structural strength

♦Good heat resistance and flame retardancy

♦Excellent workability and nail holding strength

♦Environmentally friendly and low formaldehyde

OSB 3 Specifications

OSB/3 panels are available in different sizes, thicknesses and types of core. They are strong, resistant to moisture, stable in size and easy to process. This makes them perfect for loads in humid conditions.

Product Name	OSB/3 – Outdoor Load-Bearing Boards
Other Names	OSB/3、OSB 3、OSB3 board、Damp-proof load-bearing OSB、Moisture-proof Structural OSB、Exterior Grade OSB、Humid Conditions OSB、Oriented Strand Board Type3、Moisture Resistant Structural OSB Board、Exposure 1 Rated OSB
Wood Species	Poplar、Pine（Full Pine、Radiata Pine、Masson Pine、Mixed Pine）、Eucalyptus、Poplar-Eucalyptus Mix、Mixed Hardwood
Glue	PF (Phenolic)/MDI Glue – E0 / E1 Grade
Size	Commonly used: 1220x2440mm (4’x8′),Others: 610 mm x 1220 mm (2’x4′),915 mm x 1830 mm (3’x6′), 1220×2745 mm (4’x9′),1220x3050mm (4’x10′) 1250x2500mm (4.1’x8.2′), 2440x2440mm (8’x8′), 2440x7320mm(8’x24′),Upon To Request
Thickness	6mm-25mm, regular sizes: 6 (1/4″), 7 (9/32″), 8 (5/16″), 9 (3/8″), 11 (7/16″), 12 (15/32″), 15 (19/32″), 16 (5/8″), 18 (11/16″), 22 (7/8″), 25 (1″) mm, customizable upon request
Production Line Type	Continuous Flat Press Line(Dieffenbacher)
Surface Finish	Standard Unsanded Optional: Single-sided/Double-sided Sanded
Edge Profile	Square Edge (SE): Used for walls and roofs Tongue & Groove (T&G): Used for floors and applications requiring splicing (two- or four-side tongue and groove)
Moisture Content	5 – 10%
Density	630 – 680 kg/m³
Panel Marking	Inkjet printing: Brand logo, grade, thickness, production date, environmental rating Spindle direction indicator arrow (for correct installation)
Edge Sealing	Yes (usually with green, red or blue waterproof paint to reduce moisture intrusion during transport and storage)
Tolerance	Thickness Tolerance:±0.5mm (unsanded) / ±0.3mm (sanded) Length/Width Tolerance:± 2.0mm Squareness Tolerance:≤ 2.0 mm/m
Modulus of Rupture – MOR	Major Axis: ≥ 22 MPa Minor Axis: ≥ 12 MPa (Values based on thicknesses of 10-18 mm)
Internal Bond Strength – IB	≥ 0.34 MPa
Modulus of Elasticity – MOE	Major Axis: ≥ 4000 MPa Minor Axis: ≥ 1500 MPa (Values based on thicknesses of 10-18mm)
Swelling in thickness – 24h	≤ 13%
Fire Rating	D-s2, d0
MOQ	42CBM/40’GP.50CBM/40’HQ
Packing	Inner Packing:0.2mm Thickness Plastic Bag,Outer Packing:Pallet With Carton And Strapped With Steel Tape
Delivery	Within 20 days After Confirm The Order
DaysPayment	TT,L/C,DP,MONEYGRAM,WESTERN UNION,PAYPAL
Usage	roof decking,roof sheathing, Site Hoarding & Formwork,external wall cladding, flooring in areas with fluctuating humidity such as kitchens and bathrooms, subflooring, and building outdoor structures like sheds.
Capacity	10000CBM PER MONTH
Standard Compliance & Certifications	EN 317 ,EN 319,EN 324,FSC™, CARB P2, ENF, CE, ISO 9001, ISO 14001, PEFC, etc.

Compare to other materials

Material comparison	OSB/3	Structural Plywood	Particle Board (Chipboard)	MDF (Medium-Density Fiberboard)
cost	⭐⭐⭐⭐☆	⭐⭐☆☆☆	⭐⭐⭐⭐⭐	⭐⭐⭐☆☆
Strength (bending resistance)	⭐⭐⭐⭐☆	⭐⭐⭐⭐⭐ (Note that there may be weaknesses at the knots)	⭐☆☆☆☆	⭐⭐☆☆☆
Nail holding force	⭐⭐⭐⭐☆	⭐⭐⭐⭐⭐	⭐⭐☆☆☆ (Not suitable for repeated disassembly and assembly)	⭐⭐☆☆☆ (Poor nail grip on the board edge)
Moisture resistance	⭐⭐⭐⭐☆ (Designed for humid environments)	⭐⭐⭐⭐☆ (WBP/phenolic glue required)	⭐☆☆☆☆ (Severe expansion and deformation in contact with water)	⭐⭐☆☆☆ (MR moisture resistance rating required)
Surface flatness (untreated)	⭐⭐☆☆☆ (Needs sanding for a smooth finish)	⭐⭐⭐☆☆ (Depends on panel level)	⭐⭐⭐⭐☆	⭐⭐⭐⭐⭐
in conclusion	The champion of value for money in engineering. It delivers the optimum strength-to-cost ratio for moisture-resistant load-bearing applications such as structural wall cladding, roof panels and floor slabs.	The traditional benchmark for strength. Boasting unrivalled laminar structural strength and impact resistance, it is the preferred choice for demanding beams, trusses, and load-bearing structures requiring ultimate robustness.	The ultimate low-cost solution. Suitable only for applications in dry or slightly damp environments where cost sensitivity is paramount and no load-bearing capacity is required.	An ideal substrate for finishing. Boasting a flawless surface, it is an excellent choice for spray painting, laminating and CNC engraving. Commonly used for cabinet doors, decorative mouldings and display fixtures.