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PRODUCT SPECIFICATIONS
- OSB panels are available in 4 foot nominal widths and 8, 9, or 10 foot lengths
- Available performance categories: 7/16˝, 15/32˝, and 19/32˝
- Available on APA Exposure 1 rated OSB
- Recognized as carbon negative by ASTM in 2023
Features and Benefits
Resisting Flame Spread
Do More with Less
Exceed Expectations
Design Freedom
Carbon Negative
![Multifamily building with FlameBlock installed](/media/9638/flameblock-1-2x.jpg)
Sales Tools
Product Catalog
Architectural Specifications
Assembly Reference Guide
Portfolio Product Guide
![FlameBlock panels stacked](/media/9639/flameblock-2-2x.jpg)
Technical Documents
Installation Instructions
Rebates
Environmental Product Declaration
Warranty Information
![Building with FlameBlock panels installed](/media/9680/techdocuments-flameblock.jpg)
Building for Resiliency
Guide to Fire Resistance
UL Fire Ratings to Know
Factoring Resiliency into Code Requirements
Carbon Negative Product Portfolio
Putting Our Fire-Rated Panels to the Test
See how LP FlameBlock sheathing performs in a controlled product demonstration compared to untreated OSB.
How It’s Made
To create a standard OSB panel, LP’s innovative manufacturing process combines wood strands oriented in cross-directional layers with waxes and resins. Then, to create LP® FlameBlock® panels, LP’s proprietary non-combustible, fiberglass-reinforced Pyrotite® coating is added, which combines flame-spread and burn-through resistance. This creates a product that not only resists fire damage but meets code, provides design flexibility, and also offers the strength and structural integrity of traditional OSB panels.
![Infographic of FlameBlock board](/media/9635/made-of.png)
Fire Resistive Technology
Elevate your build with a solution that helps meet building code requirements for fire-resistant construction. Evaluated by ICC-ES, LP® FlameBlock® Fire-Rated Sheathing is a component of 1- and 2-hour fire-rated wall assemblies and for use in roof deck applications. It combines flame-spread and burn-through resistance to give your customers peace of mind.