LP FlameBlock

For Residential Builders

LP® FlameBlock® Fire-Rated OSB Sheathing Meets Code and Achieves More

LP® FlameBlock® Fire-Rated OSB Sheathing lets you meet today’s evolving fire codes and so much more. It’s easy to install and it gives you opportunities for building walls and roof decks faster for less money.

Achieve more with the strength, savings and easy installation of assemblies using LP FlameBlock sheathing.

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Lower Material and Labor Costs for Partition Walls

With LP FlameBlock sheathing, you can reduce material and labor costs for fire-rated party walls. It installs easily without special tools and requires no additional components like C channels, H studs and breakaway clips.




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Reduces Panel Weight

A single-sheet LP FlameBlock 4 ́ x 8 ́ panel weighs 54 lbs. less than a
4 ́ x 8 ́ gypsum panel.

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Intertek Listing LPB/WPPS-60-01 For Exterior Load Bearing Walls

This assembly provides one-hour fire rating from zero lot line and infill applications where load-bearing exterior walls are very close to the property line.
  • Reduces labor costs and construction time
  • Provides better substrate for securely fastening exterior facing
  • Allows a range of code-compliant exterior facings
  • Exposure 1 classification; withstands normal exposure to moisture during construction (Interior-grade FRT plywood must be protected from precipitation during construction)



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