LP FlameBlock

Meet Code. Exceed Expectations.

Image courtesy of KTGY Group and Avalon Bay


A Single Fire-Rated Panel
That Allows You To Do More With Less 

LP® FlameBlock® Fire-Rated OSB Sheathing is ICC-certified to meet code and provides additional value—strength, savings and greater design flexibility. It helps you build fire-rated wall assemblies and roof deck faster—at a lower cost—than most common alternatives.

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Code Approved

  • ICC-certified (ESR-1365)
  • Class A and 30-Minute Flame Spread Rating (ASTM E84, UL 723)
  • Combines flame-spread resistance and burn-through resistance
  • 15-Minute Thermal Barrier Protection (UBC 26-2)
  • Component of fire-rated interior and exterior wall assemblies and roof decks

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Installation Instruction Video for UL No. U350B Wall Assembly

This animated video provides a side-by-side comparison showing how the U350B wall assembly featuring LP® FlameBlock® Fire-Rated OSB Sheathing installs faster and easier than traditional shaft wall. On average, U350B assemblies save 4 inches of floor space per 4-foot wall compared to shaft wall.

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New Alternatives to Party Wall Construction

With a growing need and limited dollars, multifamily owners and developers will ask architects to come up with smarter, more affordable ways to speed construction. One area already under serious review are wall assemblies for elevator shafts, stairwells and area separation.

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