Barrier Technology

21 July 2010

LP® FlameBlock™ passes California 12-7A-1 Burn Test

LP® FlameBlock™ Fire-Rated OSB has recently passed the California OSFM (Office of the State Fire Marshal) Chapter 122-7A-1 test: Fire Resistive Standard for Exterior Wall Siding and Sheathing.

FlameBlock™ -- manufactured by Barrier Technology Corporation for LP (Louisiana Pacific) Building Products, Nashville, TN passed a series of tests using FlameBlock™ as sheathing covered by LP® SmartSide® Lap and Panel Siding (Precision Series -- strand substrate) and using 1/2" cedar shingles. Builders can now use FlameBlock™ with these coverings -- as well as plain-bevel solid wood lap siding of various widths, including cedar and other species -- to address requirements of Chapter 7A of the California Building Code.

Click here to see a full copy of our test report.

Here is a picture of how this wall might be built using LP® SmartSide®.

FlameBlock has also been added to three newly-released 1 and 2 hour UL Wall Assemblies, as described in our ICC-ESR 1365 Report. Those wall assembly diagrams can be found here:


Architects, engineers, builders, and code officials looking for more information on wall assemblies utilizing FlameBlock are encouraged to contact Barrier Technology or LP Building Products for further information.

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Location: Watkins, Minnesota, United States

Barrier develops, manufactures, and markets proprietary fire resistant building materials designed to help protect people and property from the destruction of fire. Barrier's award-winning Blazeguard® structural wood panels exceed International Building Code requirements in every targeted fire test and application. Blazeguard® is coated with Barrier's patented, non-toxic, non-combustible Pyrotite formulation, which releases water when exposed to the heat of fire.