M4 FRB is an innovative and cost-effective fire-restrictive barrier for use in exterior wall assemblies. Simply install a single layer of 1/8″ thick M4 FRB panel to the extereior-facing 7/16″ sheathing and boost most structural wood framed exterior wall assemblies to a 1-hour fire-rating when built per test reports. M4 FRB also meets industry standards as a weather-restrictive barrier (WRB) for added protection while saving time and money on your projects.
- Boost your exterior wall assembly to 1 hour (when built per tested assembly)
- Simply attach to exterior wood sheathing and seal joints
- ASTM E119 – 1-hour load bearing wall
- ASTM E84 – 30 minute extended duration (Class A)
- Fire tested both-sides of the wall
- Ideal for wildfire urban interface areas (WUI)
- Passed ASTM E331 and E96 for weather penetration / transmission
- Eliminate extra layers of gypsum board
- Eliminate need for added WRB
- Lightweight and easy to handle
- Installs quickly with staples
- No silica