Water Resistant OSB/4 Structural Board for Humid Load-Bearing Applications
Water Resistant OSB/4 Board
OSB/4 is a high-performance structural oriented strand board specifically designed for load-bearing applications in humid environments. Manufactured from selected wood strands bonded with advanced waterproof resin systems, OSB/4 provides excellent mechanical strength, dimensional stability, and moisture resistance.
Compared with standard OSB/2 and OSB/3 panels, OSB/4 offers superior load-bearing capacity and durability, making it an ideal choice for demanding construction projects.
LUJU Wood supplies premium-quality OSB/4 panels that comply with European standards and are widely used in residential, commercial, and industrial building applications.
Key Features and Benefits
Excellent Moisture Resistance
Engineered to perform reliably in humid conditions with reduced swelling and deformation.
High Load-Bearing Strength
Suitable for structural applications requiring enhanced mechanical performance.
Superior Dimensional Stability
Maintains panel integrity under varying environmental conditions.
Easy Processing
Can be cut, drilled, nailed, and screwed using standard woodworking tools.
Eco-Friendly Material
Manufactured from sustainably sourced wood and compliant with environmental standards.
Cost-Effective Alternative
Provides structural performance comparable to plywood while reducing overall project costs.


Product Specifications
| Property | Value |
|---|---|
| Product Type | OSB/4 |
| Thickness | 6-40 mm |
| Width | 1220 mm |
| Length | 2440 mm / Custom |
| Density | 600-720 kg/m³ |
| Glue Type | PMDI / Phenolic Resin |
| Moisture Content | 8-12% |
| Formaldehyde Emission | E0 / E1 |
| Edge Type | Square Edge / Tongue & Groove |
| Standard | EN 300 |
| Certification | CE, FSC, CARB |
Applications of OSB/4 Board
OSB/4 is widely used for:
- Structural flooring systems
- Roof decking
- Wall sheathing
- Timber frame construction
- Modular buildings
- Industrial packaging
- Construction hoarding
- Warehouse flooring
- Container flooring
- Agricultural buildings
Why Choose LUJU Wood?
- More than 15 years manufacturing experience
- Strict quality control system
- Stable supply capacity
- OEM and customized sizes available
- Fast delivery worldwide
- Competitive factory-direct pricing
- Professional export service
Frequently Asked Questions
What is the difference between OSB/3 and OSB/4?
OSB/4 provides higher load-bearing strength and better performance in humid conditions than OSB/3.
Is OSB/4 waterproof?
OSB/4 is highly moisture resistant but is not intended for permanent water immersion.
Can OSB/4 be used for flooring?
Yes. OSB/4 is commonly used as a structural subfloor due to its high strength and dimensional stability.
What thicknesses are available?
Common thicknesses range from 6 mm to 40 mm, with custom specifications available upon request.
Do you provide OEM service?
Yes, LUJU Wood offers OEM production, customized dimensions, and private labeling services.
Related Products
OSB 4 Board
Tongue & Groove OSB
Flooring OSB Board
Roofing OSB Board
Film Faced Plywood
