Top 10 Materials to Avoid in Wildfire Zones

When preparing your home for a wildfire, one of the most important steps is selecting the right building materials. Unfortunately, not all materials are created equal, and some can increase the vulnerability of your home during a wildfire. This blog will outline the top 10 materials to avoid in wildfire zones, helping you make informed choices when protecting your home.

Why Material Selection Matters in Wildfire Defense

The materials you choose for your home’s roof, siding, deck, and landscaping play a huge role in how well it can withstand the extreme conditions of a wildfire. Wildfires are unpredictable, and ember attacks, radiant heat, and direct flames are just a few of the risks to consider. Certain materials are highly flammable, which can contribute to the rapid spread of fire, putting your property—and potentially the whole neighborhood—at greater risk.

Let's explore the top 10 materials you should avoid when building or renovating your home in a wildfire zone.

1. Wood Shingles/Shakes

Wood shingles and shakes are classic roofing materials, but they are also one of the most flammable options. During a wildfire, embers can easily ignite wooden shingles, causing the fire to spread quickly. Even if a fire doesn’t directly touch the roof, the heat from nearby flames can still ignite wood shingles.

• Recommendation: Opt for Class A fire-rated roofing materials like metal, clay tiles, or composite shingles.
  
  

2. Unrated Asphalt Shingles

Asphalt shingles are commonly used due to their cost-effectiveness, but they don’t provide adequate protection in a wildfire. Unrated asphalt shingles are particularly vulnerable to the heat and embers produced by wildfires, making them an unsafe choice for homes in fire-prone areas.

• Recommendation: Choose Class A fire-rated composite shingles or metal roofing for better fire protection.
  
  

3. Vinyl Siding

Vinyl siding is an affordable option, but it is highly flammable and can melt or catch fire when exposed to heat. The melting vinyl can spread flames to your home’s interior, further damaging your property. It’s important to avoid vinyl siding, especially in Zone 0 and Zone 1.

• Recommendation: Go for fiber cement board or metal siding, both of which are fire-resistant options.
  
  

4. Treated Wood (Untreated)

While treated wood can offer some level of protection against moisture and pests, it is still highly flammable and should be avoided in high-risk wildfire zones. When untreated, wood is even more susceptible to fire, and it can act as fuel during a wildfire, spreading flames rapidly.

• Recommendation: Use fire-resistant materials like fiber cement board or fire-rated wood products.
  
  

5. Plastic or PVC Gutters

Plastic gutters may seem like a cost-effective solution, but they melt quickly and can easily catch fire when embers land on them. Plastic is one of the most flammable materials around your home, and it’s best to avoid it in favor of more fire-resistant options.

• Recommendation: Install galvanized steel or aluminum gutters with metal gutter guards to prevent ember buildup.
  
  

6. Synthetic Turf

Synthetic turf might look appealing, but it is a non-natural material that can melt and catch fire quickly. The plastics and chemicals used in synthetic turf make it a significant fire hazard when exposed to intense heat.

• Recommendation: Use natural, fire-resistant ground covers like succulents, grass, or wildflower meadows to maintain aesthetic appeal without compromising safety.
  
  

7. Plastic Window Frames

Plastic window frames, while lightweight and inexpensive, are highly flammable. When exposed to the intense heat of a wildfire, plastic window frames can melt or ignite, allowing embers to easily enter your home.

• Recommendation: Choose metal or aluminum window frames that provide better protection from both heat and flames.
  
  

8. Wood Decking

Wooden decks are one of the most vulnerable areas of a home during a wildfire, as embers can easily settle underneath and ignite the wood. The flame can spread quickly, causing significant damage to your property and posing a risk to your entire structure.

• Recommendation: Opt for fire-rated composite decking or metal decking to prevent fire spread from beneath the deck.
  
  

9. Traditional Wood Fencing

Wooden fences attached to your home can act as a bridge for fire to spread to your structure. The flammable nature of wood, combined with its ability to easily ignite from embers, makes traditional wood fencing a poor choice for wildfire defense.

• Recommendation: Install metal, stone, or masonry fencing to create a fire-resistant barrier around your home.
  
  

10. Highly Flammable Mulch

Mulch is often used in landscaping but can be a major fire hazard, especially when it is made of wood chips or bark. These materials are highly flammable, and dry conditions can make them catch fire even more easily.

• Recommendation: Replace wood mulch with gravel, stone, or decomposed granite. These non-combustible materials provide a beautiful, fire-safe landscaping solution.
  
  

Bonus: Full-Structure Fire Shielding

Even with the best materials in place, there are scenarios—like a neighboring home catching fire—where radiant heat and ember storms may overwhelm your defenses. That’s where full-structure fire shielding comes in.

Our solution is:

• Waterless (no plumbing or sprinkler system needed)
  
  

• Self-sufficient (no supervision required)
  
  

• Rated to 3,000°F, with deployment designed to protect against ember storms and radiant heat
  
  

Final Thought:

While it’s important to use fire-resistant materials for every part of your home, it’s equally important to think about Zone 0 and Zone 1 when designing and landscaping your property. By avoiding highly flammable materials and focusing on non-combustible options, you can help ensure that your home is better protected from the dangers of wildfire.

The Zone Zero Fire Shield team hopes you find this information helpful.

Related Blogs in Our Series:

• How to Harden Your Home for Ember Resistance
  
  

• Defensible Space: The First Line of Defense Against Wildfires in Berkeley
  
  

• The Role of Fire-Resistant Landscaping in Wildfire Defense
  
  

Understanding Ember Attacks and How to Protect Your Home from Wildfire Embers

Embers are one of the most dangerous and overlooked threats during a wildfire. While many people focus on the flames, the flying embers can cause more damage than the fire itself, and they are responsible for the majority of home ignitions. In fact, over 90% of homes destroyed during wildfires are ignited by embers, not the main fire front.

In wildfire-prone areas like Berkeley, where steep terrain, dense vegetation, and high winds create ideal conditions for ember spread, understanding how ember attacks work—and how to protect your home from them—is essential. In this blog, we will discuss the science behind ember attacks, the risks they pose to your property, and the steps you can take to protect your home from this hidden wildfire danger.

What Are Embers?

Embers are small, glowing pieces of burning debris that are carried by the wind during a wildfire. They can be made up of burning leaves, branches, wood, or other materials, and they can travel miles ahead of the main fire. Embers are highly unpredictable—one gust of wind can carry them far and wide, sparking fires in places that are nowhere near the original firefront.

Embers can ignite a variety of materials, from dry vegetation to wooden structures, and even glass windows. They are one of the primary reasons that homes located far from the fire’s immediate path can still catch fire. The radiant heat from embers can even cause fires without direct contact with the flames.

How Do Ember Attacks Work?

Embers are most dangerous in strong winds, which can push them over long distances, creating multiple fire fronts. As wildfires produce massive amounts of heat and flames, embers become airborne and travel unpredictably. They can settle on roofs, under eaves, in gutters, or on decks—places that might seem safe but are highly vulnerable to ember ignition.

Embers can land in places far ahead of the main fire, often starting fires in multiple locations simultaneously. For instance, in the case of the Palisades Fire, 90% of the structures destroyed were ignited by embers from neighboring burning homes, and radiant heat played a significant role in starting these secondary fires.

Understanding how embers behave can help you take preventative actions to protect your property. By hardening your home and creating defensible space, you can minimize the risk of embers landing on vulnerable surfaces and igniting your home.

The Impact of Wind on Ember Spread

Wind plays a crucial role in ember spread. In wildfire-prone areas like Berkeley, winds can reach speeds of 40-50 mph or more, carrying embers from one place to another. Strong winds can push embers hundreds of yards away from the fire’s location, often spreading fires in different directions. This is why embers can be responsible for igniting structures far away from the main wildfire, especially in dense, urban areas.

In some of California’s most devastating fires, winds have carried embers as far as five miles or more, igniting homes and other structures along the way. This underscores the importance of preparing your home not just for the threat of direct flames but also for wind-driven ember attacks.

How to Protect Your Home from Ember Attacks

While embers are small, their ability to ignite a home is significant. Fortunately, there are several effective measures you can take to protect your home from the dangers of ember attacks:

1. Install Ember-Resistant Vents:
   One of the most vulnerable parts of your home is the ventilation system. During a wildfire, embers can easily enter through attic vents, soffit vents, and crawl space vents. To prevent this, install ember-resistant vents that have 1/8-inch mesh screens to keep embers from getting inside. You can also use non-combustible vent covers for additional protection.
   
   

2. Create a Defensible Zone Around Your Home:
   The Ember Program recommends creating a defensible space around your home by removing combustible materials and reducing the fuel load near your structure. This includes clearing dry leaves, branches, and other flammable debris from your yard, roof, and gutters. Create Zone 0 (0-5 feet), which is an ember-resistant zone, using fire-resistant materials like gravel, stone, and concrete.
   
   

3. Use Fire-Resistant Roofing and Materials:
   Your roof is one of the most exposed parts of your home and is highly vulnerable to ember ignition. Class A fire-rated roofing materials such as metal, clay tiles, or concrete tiles are ideal for preventing embers from igniting your roof. Additionally, replacing wooden decking with composite decking or fire-resistant materials can help prevent embers from starting a fire in these areas.
   
   

4. Install Tempered Glass Windows:
   Regular windows can easily shatter when exposed to radiant heat or flying embers. Tempered glass windows are much more resistant to heat and are less likely to break under high temperatures. Consider replacing your windows with dual-pane glass or tempered glass to provide better protection from ember attacks.
   
   

5. Trim Trees and Remove Ladder Fuels:
   Ladder fuels, which are plants and branches that allow fire to climb from the ground to the tree canopy, can help embers spread quickly. To prevent this, trim trees and shrubs, especially those within 5 to 30 feet of your home. Keep tree branches at least 10 feet away from chimneys and stovepipes.
   
   

6. Use Non-Combustible Fencing:
   Wooden fences can act as fuel for embers, especially if they are attached to your home. Consider replacing wooden fences with metal, stone, or masonry fences, which are non-combustible and won’t catch fire easily.
   
   

7. Maintain Gutters and Roofs:
   Gutters and roofs often collect dry leaves, pine needles, and other debris that are perfect for igniting. Regularly clear debris from gutters, rooftops, and under eaves to reduce the risk of embers igniting these materials. Additionally, consider installing gutter guards to prevent debris buildup.
   
   

8. Fire-Resistant Landscaping:
   Use fire-resistant plants such as succulents, lavender, and manzanita to create a fire-safe zone around your home. Avoid flammable vegetation like juniper and pine trees that are likely to catch fire in a wildfire. Keep plants well-irrigated to prevent them from drying out and becoming fire hazards.
   
   

How the Ember Program Supports Ember Protection in Berkeley

The EMBER program in Berkeley encourages residents to create defensible space and harden their homes with ember-resistant materials, including fire-resistant roofs, windows, and vents. The city is actively promoting these strategies to help residents reduce the risk of ember attacks. The Ember Program provides detailed regulations and guidelines for creating a fire-safe environment.

For more details on the EMBER program, visit the City of Berkeley EMBER Program page.

How Zone Zero Fire Shield Can Help Protect Your Home

While the steps outlined above will significantly reduce the risk of ember attacks, adding an extra layer of protection with Zone Zero Fire Shield can provide added security for your home. Zone Zero Fire Shield offers fire-resistant blankets that can be quickly deployed around your home to protect against embers, radiant heat, and flames during wildfire events.

For more information on Zone Zero Fire Shield and how it can help protect your home from ember attacks, contact us.

Conclusion: A Comprehensive Defense Against Ember Attacks

Understanding how embers work and taking proactive steps to protect your home is essential for surviving a wildfire. By implementing ember-resistant materials, creating defensible space, and regularly maintaining your property, you can reduce the chances of your home catching fire from ember attacks. The EMBER program provides the tools and resources to help you protect your home from embers and radiant heat, but additional steps like Zone Zero Fire Shield offer an extra layer of protection.

Don’t wait for the next wildfire to hit—start taking steps today to safeguard your home from the threat of ember attacks.

Other Related Blogs in Our Series:

• What is Zone Zero in Wildfire Defence: Learn about the importance of Zone Zero, the ember-resistant zone, in protecting your home from wildfires.
  
  

• How to Harden Your Home for Wildfire Protection: Discover how strengthening your home’s structure can make it more resistant to wildfires.
  
  

• The Role of Fire-Resistant Landscaping in Wildfire Defense: Explore how landscaping choices can influence the effectiveness of your home’s wildfire defense strategy.