Naturally 
Noncombustible

Find out why CMU is a critical defense 
against heat and flame

SOURCE: Mutual Materials

Fire resilience is fundamental to responsible design.
Block delivers built-in protection and a clear pathway to meet or exceed fire rating requirements, maintain structural integrity, and support safety for both occupants and first responders.

Wildfires:

The growing threat

Wildfires are increasing in frequency, intensity and impact. 
Here’s a look at the devastation they caused in 2024 alone.

Areas of high or moderate risk
of devastating wildfires

Map information provided by Federal Emergency Management Agency (FEMA) and International Building Code (IBC)
Map information provided by Federal Emergency Management Agency (FEMA) and International Building Code (IBC)

Wildfires - High or Moderate Risk
Hail - High or Moderate Risk

Built to withstand the heat

CMU is inherently fire-resistant, with proven performance in real-world conditions.
Block is more than a material choice — it’s a commitment to protecting people, preserving
structures and enabling faster recovery when disaster strikes.

PROTECTING WHAT
MATTERS MOST

Download our Block Bite for more information on the importance of building fire-resilient structures.

RESOURCES

Explore the resources below for more insights on how to incorporate concrete masonry to enhance the resilience of your designs.

LEARN

Build your CMU IQ with FREE online courses.

WHY BLOCK?

Discover how block delivers 
it all – strength, style, sustainability and more.

DESIGN

FREE resources — project support, design guides, calculators and more.

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