OSB4
Engineered for maximum strength and moisture resistance, ensuring superior performance in the most demanding structural applications.

About OSB4
OSB4 (Oriented Strand Board Type 4) is the highest-grade OSB panel, designed for heavy-duty load-bearing applications in humid conditions. Manufactured by compressing layers of wood strands in cross-oriented patterns and bonded with moisture-resistant adhesives, OSB4 offers exceptional structural integrity and durability. It is ideal for use in construction projects where high strength and moisture resistance are paramount.
Why Choose Our OSB4?
Superior Strength
OSB4 offers the highest load-bearing capacity among OSB grades, making it suitable for heavy-duty structural applications.
Enhanced Moisture Resistance
Designed to withstand humid conditions, OSB4 maintains its integrity where other panels may fail.
Dimensional Stability
The cross-oriented strand structure provides excellent stability, reducing the risk of warping or swelling.
Eco-Friendly
Manufactured using sustainable materials and processes, OSB4 contributes to environmentally responsible building practices.
Versatility
Suitable for a wide range of applications, from structural components to decorative elements.
Specifications & Customization
Standard Sizes
Typically 2440 mm × 1220 mm, with custom sizes available.
Thickness Range
Commonly from 9 mm to 25 mm.
Density
Approximately 600–700 kg/m³.
Formaldehyde Emission Standards
Compliant with E1 standards.
Surface Finish
Smooth, suitable for painting or lamination.
Edge Profile
Square edge or tongue and groove options.
Applications of OSB4

Roofing
Provides a stable base for roofing materials and can withstand exposure to the elements.

Wall Sheathing
Offers structural support and moisture resistance for exterior walls.

Flooring
Acts as a durable subflooring material capable of handling heavy loads.

Sheds and Outbuildings
Ideal for constructing garden sheds, workshops, and other outdoor structures.

Fencing
Can be used to build sturdy and moisture-resistant fences.
FAQ
What distinguishes OSB4 from other OSB types?
OSB4 is engineered for heavy-duty load-bearing applications in humid conditions, offering superior strength and moisture resistance compared to lower-grade OSB panels.
Can OSB4 be used in exterior applications?
Yes, OSB4 is suitable for use in humid and protected exterior environments, but it should be properly sealed or clad to protect against direct weather exposure.
Is OSB4 environmentally friendly?
Yes, OSB4 is manufactured using sustainable wood sources and complies with low formaldehyde emission standards, making it an eco-friendly choice.
Can OSB4 be painted or laminated?
Absolutely, its smooth surface is suitable for painting, laminating, or applying veneers, allowing for various aesthetic finishes.
What tools are needed to work with OSB4?
Standard woodworking tools such as saws, drills, and sanders can be used effectively with OSB4.
How does OSB4 compare to plywood?
While both are used in similar applications, OSB4 offers a more uniform structure and is generally more cost-effective than plywood, with comparable strength and durability.
More Support
Packaging & Delivery
How to quickly and safely deliver the Plywood products you ordered to the designated location? You can choose from the following methods.
Packaging & Delivery
How to quickly and safely deliver the Plywood products you ordered to the designated location? You can choose from the following methods.
Plywood Core
In order to adapt to different working scenarios, we provide the following plywood cores for you to choose.
Plywood Core
In order to adapt to different working scenarios, we provide the following plywood cores for you to choose.

Glue Types
In order to adapt to different environments and scenarios, we provide a variety of plywood glue for you to choose.
Glue Types
In order to adapt to different environments and scenarios, we provide a variety of plywood glue for you to choose.
Plywood Certificate
To give you more peace of mind, we have obtained a variety of certifications to meet your needs.
Plywood Certificate
To give you more peace of mind, we have obtained a variety of certifications to meet your needs.
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Contact Us for Bulk Orders & Custom OSB4 Solutions
Partner with Shandong Fortuna International Trade Co., Ltd., one of China’s largest OSB4 manufacturers, and secure premium OSB4 for your business.
Contact Us Now for bulk pricing, free samples, and customized solutions!
Contact us today for the best OSB prices and free samples!