Inspiration3 min

The Science Behind LP FlameBlock® Fire-Rated OSB Sheathing

As the demand for fire-resistant building materials continues to heat up, LP announced the addition of a LP® FlameBlock® Fire-Rated Sheathing line at its facility in Clarke County, Alabama. As the demand for fire-rated building products in single-family, multi-family and light commercial construction markets continues, the expansion of the mill will increase LP’s ability to meet the growing demand for fire-rated products, like LP FlameBlock. 

But just how exactly does LP FlameBlock work to slow the spread of flames?

LP FlameBlock is an ICC-certified structural fire-rated OSB sheathing that combines fire resistance and impressive structural performance in a single panel. The fire-resistant coating bonded to LP® OSB allows for a 15-minute thermal barrier (UBC 26-2) and slows the spread of flame and heat.

Panels manufactured with Pyrotite® contain no less than two quarts of water per 32 square feet of panel. The water is released only during the heat of a fire, so as the temperature rises during a fire, water is gradually released, reducing the spread of flames.

A unique combination of flame-spread resistance and burn-through resistance, LP FlameBlock has a code compliant component of 1-hour and 2-hour fire-rated interior and exterior wall assemblies and roof decks. LP FlameBlock is backed by a 20-Year Transferrable Limited Warranty.*

Learn more about LP FlameBlock and watch the video comparing it to both FRT plywood and gypsum.

*See for complete warranty details. 

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Business Solutions

4 min

Q&A: How Home Orientation Impacts Continuous Insulation

There’s a lot to consider when it comes to building an energy-efficient home for your clients and the many nuances that change with each build—including its orientation to the sun.

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Resiliency Solutions

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There are several insulation methods based on attic design, but ducts placed over the bottom of truss chords and buried under insulation in a vented attic is a popular builder option.

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How to Drive Effective Communication and Collaboration on the Jobsite

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Sustainability Solutions

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Carbon Negative, Future Positive: LP® Structural Solutions Portfolio Releases Environmental Product Declarations

In an era where environmental responsibility is paramount, we are proud to announce a remarkable achievement: the LP® Structural Solutions portfolio has been officially designated as carbon negative. This milestone is a testament to our unwavering commitment to redefining construction materials for the better with a focus on sustainability, resiliency and groundbreaking advancements.