What is Fire-Rated Sheathing?

To make your builds as safe as possible for now and the future, it’s important to understand the role of Fire-Rated Sheathing. Let’s explore how it can help you meet codes and keep your builds safe.

Breaking Down Fire-rated Sheathing

Sheathing is a panel used to form a surface on a building onto which other materials can be applied. When sheathing products have fire-resistant properties they are engineered to help resist fire exposure and provide protection to help maintain the structural integrity of the building.


Why Is Fire-Rated Sheathing Important?

Fire-resistant sheathing is most commonly used in 1-hour and 2-hour fire-resistance-rated assemblies for commercial and residential construction. The use of fire-resistant sheathing in wall assemblies helps protect the integrity of the structure and contain and isolate a fire.


First and foremost, Fire-Rated Sheathing may add to the overall safety of a building. Providing flame spread and burn-through resistance helps slow the fire, allowing first responders a chance to respond and minimize damage.

Meeting Codes

In wildland-urban interface (WUI) areas, meeting Ignition Resistant Construction requirements is extremely important. Fire-Rated Sheathing may help your building meet code without sacrificing ease of installation and design.

Peace of Mind

Fire-Rated Sheathing also offers assurance to contractors and owners alike that their structures include the best precautions possible, should a fire occur.

the details of fire resistance

Details vary by assembly, including thickness of the fire-resistant-rated wall, which generally increase in thickness as the exposure time increases. To provide increased fire protection, fire-resistant sheathing and other products are tested and evaluated by third parties. Here is the process:

  • Wall assemblies designed for fire-resistance are tested in accordance to ASTM E119
  • Materials are evaluated to the performance requirements of the International Building Code (IBC)
  • Fire-resistance is evaluated by accredited agencies such as ICC-ES, Intertek and UL

What Is LP® FlameBlock® Fire-Rated Sheathing?

Meet Code.® Exceed Expectations with with LP FlameBlock Fire-Rated Sheathing. As an evaluated component of 1-hour and 2-hour wall assemblies and roof deck applications, LP FlameBlock panels combine flame-spread and burn-through resistance to bolster a building’s fire-resistance capabilities.


See the Impact of Fire-Rated Sheathing

It’s easy to see how Fire-Rated Sheathing can make a difference for a build by giving firefighters time to respond. Click to watch!

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Fire-Rated Wall Assemblies

LP FlameBlock Fire-Rated OSB Sheathing is a component of the following code-compliant fire-resistance-rated assemblies. Click to learn more.

LP FlameBlock Fire-Rated Sheathing

Need more details about LP FlameBlock Fire-Rated OSB Sheathing? Look here for complete details, including warranties, assemblies and more.

LP Structural Solutions

LP FlameBlock panels are part of a portfolio of solutions designed to Defend Your Build® against the elements. Check out the full portfolio here.

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