LP FlameBlock Fire-Rated OSB Sheathing

LP® FlameBlock® Fire-Rated OSB Sheathing has structural design values equal to standard sheathing in the same performance category. ICC-certified (ESR-1365) per AC264 with a Class A and 30-minute Flame Spread Rating (ASTM E84), it combines fire resistance and impressive structural performance in a single panel.

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LP FlameBlock Fire-Rated OSB Sheathing Benefits

LP® FlameBlock® Fire-Rated OSB Sheathing combines fire resistance and structural performance in a single panel. Advantages include:

  • Fire Resistance: A unique combination of flame-spread resistance and burn-through resistance, it’s a code compliant component of 1-hour and 2-hour fire-rated interior and exterior wall assemblies and roof decks.
  • Strength: Carries full design values for load/span and shear as untreated wood structural panels.
  • Protection: 15-minute thermal barrier (UBC 26-2).
  • Weather Resistance: Exposure-1 rated to withstand moisture during normal construction delays.
  • Sustainability: Wood sourced through programs certified under the Sustainable Forestry Initiative®.
  • 20-Year Transferable Limited Warranty: Backed by a long-term warranty so you can build with confidence.

How It’s Made

A cost-effective solution for fire-resistant construction, LP® FlameBlock® Fire-Rated OSB Sheathing is manufactured with proven technology:

  • A patented non-combustible Pyrotite® layer slows the spread of flame and heat.

Product Specifications

  • Structural Fire-Rated Sheathing
  • Class A Flame Spread Rating
  • 3 Times Longer Burn-Through Resistance Than Standard Wood Sheathing
  • Non-Combustible, Fiberglass-Reinforced Magnesium Oxide Coating Over LP® OSB
  • Two Quarts Of Water Locked Into Each 32 Square Feet Of Coating (4´ x 8´)
  • Allows For Faster, More Cost-Effective Compliance With Fire Codes, Even In Seismic Zones
  • Durable, Easy To Handle On Job Site
  • No Hazardous Chemicals
  • Variety Of PS2-Rated Thicknesses And Lengths, Including Struc-1
  • 20-Year Transferable Limited Warranty

 

Product Videos

LP FlameBlock Fire-Rated OSB Sheathing

Learn more about LP FlameBlock Fire-Rated OSB Sheathing.

LP FlameBlock Fire-Rated OSB Sheathing at IBS 2014

LP’s Marketing Analyst explains the benefits of LP FlameBlock Fire-Rated OSB Sheathing.