FRB™ Fire-Restrictive Barrier

Exterior Wall Upgrade Panel

The FRB panel is a ⅛″ thick fire- and weather-restrictive barrier applied directly over 7/16″ OSB or plywood sheathing. It upgrades typical wood-framed exterior wall assemblies to a 1-hour fire rating while qualifying as a weather-resistive barrier.

key Properties

Weight: ~0.7 lb/ft² (22.5 lb per 4′×8′ sheet)

1-hour fire rating (ASTM E119 balanced wall assembly)

Class A surface burn (ASTM E84, 30-minute extended)

Passes ASTM E331 water penetration and ASTM E96 vapor transmission

Noncombustible core, chloride content < 1%, and corrosion resistance

Advantages

Combines exterior fire protection and WRB in one step

Lightweight and easy to handle

Installed with 16‑ga 1/2" crown staples or equivalent fasteners

Mold, corrosion, and insect-resistant

Applications

Exterior walls in multi-family, hospitality, and commercial buildings
Wildland-Urban Interface (WUI) and retrofit upgrades

Exterior walls in multi-family, hospitality, and commercial buildings

Wildland-Urban Interface (WUI) and retrofit upgrades

Download the FRB Submittal and Installation Guide for full specifications.

Submittal