Is Spray Foam Insulation Flammable? [Yes Or No] Read The Answer

Do you know if spray foam insulation is flammable? If you’re unsure, you’ve come to the right place. In this article, we will answer the burning question: is spray foam insulation flammable or not?

Understanding the flammability of insulation is essential for ensuring the safety of your home. We will explore how to prevent spray foam from burning and discuss other insulation materials that are effective for fire resistance.

Additionally, we will compare the safety of spray foam insulation to fiberglass insulation and provide tips for enhancing the fire safety of your insulation.

Flash PointVaries depending on foam type
Melting PointTypically does not melt
Potential RiskFire hazard, toxic fumes
Common UseBuilding insulation, sealing gaps
UsageInsulating walls, roofs, and attics
Environmental ImpactCan release harmful emissions

So, let’s dive in and find out the answer to whether spray foam insulation is flammable or not.

What Is Spray Foam Insulation?

If you’re wondering what spray foam insulation is, it’s a type of insulation that’s applied using a spray gun to create a seamless layer of insulation.

Spray foam insulation is made up of two chemical components that mix together during application and then expand to fill the desired space.

This type of insulation can be categorized into two main types: open cell spray foam insulation and closed cell spray foam insulation.

Closed cell spray foam insulation is known for its superior fire resistance and low flammability compared to open cell spray foam insulation.

The fire rating of closed cell spray foam insulation is typically higher due to its dense structure, which acts as a barrier against the spread of flames.

However, it’s important to note that while closed cell spray foam insulation is less flammable, it isn’t entirely fireproof.

It still needs to be installed and used in accordance with local building codes and regulations to ensure maximum fire safety.

Is Spray Foam Insulation Flammable Or Not?

Spray foam insulation’s flammability can be determined by its composition and compliance with local building codes. While spray foam insulation itself is not flammable, the chemicals used in its production can present a fire risk if not handled properly.

The foam is created by combining two components, an isocyanate and a polyol resin, which react to form a rigid foam. During this process, the foam expands and releases heat. However, the foam isn’t easily ignited and doesn’t support flame spread.

To ensure its safety, it’s crucial to follow manufacturer instructions and local building codes regarding installation and fire protection. Properly installed and compliant spray foam insulation can effectively reduce the risk of fire in buildings.

Is Spray Foam Insulation Flammable (1)

Flash Point of Spray Foam Insulation

Open-Cell Spray Foam Insulation:

  • Flammability: Open-cell spray foam insulation is generally more flammable than closed-cell foam.
  • Flash Point: Around 700°F (371°C) or higher.

Closed-Cell Spray Foam Insulation:

  • Flammability: Closed-cell spray foam insulation is less flammable compared to open-cell foam.
  • Flash Point: Around 1000°F (538°C) or more.

Icynene Spray Foam Insulation:

  • Flammability: Icynene open-cell spray foam insulation is relatively less flammable than some other open-cell foams.
  • Flash Point: Around 700°F (371°C) or higher.

Medium-Density Spray Foam Insulation:

  • Flammability: Medium-density spray foam insulation falls between open-cell and closed-cell foam in terms of flammability.
  • Flash Point: Around 800-900°F (427-482°C) or more.

Low-Density Spray Foam Insulation:

  • Flammability: Low-density spray foam insulation, typically open-cell, is more flammable compared to higher-density foams.
  • Flash Point: Around 700-750°F (371-399°C) or higher.

How To Prevent Spray Foam From Burning?

To prevent spray foam from burning, you should ensure proper handling and installation to minimize any potential fire risks. One way is to use fire retardant chemicals during the installation process. These chemicals help to reduce the flammability of the foam and increase its resistance to fire.

It’s important to follow the manufacturer’s instructions regarding the thickness and coverage of the insulation. This ensures that the foam is applied properly and reduces the chances of gaps or voids where fire can spread.

Regular maintenance and inspection of the insulation can also help identify any potential issues and prevent burning. By following these guidelines, you can effectively prevent spray foam insulation from burning and enhance the safety of your property.

Ignition Temperature and Flame Spread (1)

What Insulation Materials Are Effective For Fire Resistance?

One effective insulation material for fire resistance is fiberglass. Unlike spray foam insulation, which is flammable, fiberglass is known for its ability to withstand high temperatures and resist the spread of fire. This is due to its composition of fine glass fibers that are tightly woven together to create a dense and non-combustible barrier.

Fiberglass insulation also has a high melting point, making it less likely to ignite or contribute to the spread of flames. Additionally, its inherent fire-resistant properties help to protect the underlying structure and prevent the fire from spreading to other areas.

Is Fiberglass Insulation Safer Than Spray Foam?

Choosing fiberglass insulation over spray foam is a safer option. Here are four reasons why:

  1. Non-Flammable: Fiberglass insulation is made of inorganic materials that aren’t combustible, making it less likely to ignite or contribute to the spread of fire. In contrast, spray foam insulation is highly flammable and can release toxic gases when exposed to heat or flames.
  2. Healthier Indoor Air Quality: Fiberglass insulation doesn’t emit harmful chemicals or volatile organic compounds (VOCs) that can compromise air quality. On the other hand, spray foam insulation contains chemicals, such as isocyanates, which can cause respiratory issues and allergic reactions.
  3. Moisture Resistance: Fiberglass insulation is naturally resistant to moisture, preventing the growth of mold and mildew. Spray foam insulation, if not properly installed or sealed, can trap moisture and lead to mold infestations, posing health risks.
  4. Longevity: Fiberglass insulation has a longer lifespan compared to spray foam insulation. It doesn’t degrade over time, ensuring continued insulation effectiveness and energy savings.

Can Spray Foam Spontaneously Combust?

Is spray foam insulation prone to spontaneous combustion?

This is a common concern when it comes to using spray foam insulation as a thermal insulator. The flammability of spray foam insulation depends on the type of foam used.

Closed cell foam, which has a higher density and is more rigid, is less prone to spontaneous combustion than open cell foam. However, it’s important to note that both types of foam are considered flammable.

To mitigate the risk of fire, it’s recommended to install an ignition barrier over the foam insulation. This barrier acts as a protective layer, preventing direct exposure of the foam to potential ignition sources.

Therefore, while spray foam insulation can be flammable, proper installation and the use of an ignition barrier can greatly reduce the risk of spontaneous combustion.

Are There Non-Flammable Foam Insulation Options?

Consider non-flammable foam insulation options for enhanced safety and peace of mind. When it comes to choosing insulation for your home or building, it’s important to prioritize fire safety. Fortunately, there are non-flammable spray foam insulation options available that can provide excellent insulation properties without the risk of combustion.

Here are four options to consider:

  1. Closed Cell Spray Foam: This type of foam insulation has a higher density and is composed of cells that are tightly packed together. It offers excellent thermal insulation and acts as a barrier against moisture and air infiltration.
  2. Open Cell Spray Foam: While open cell spray foam has a lower density compared to closed cell, it still provides effective insulation. It’s made up of cells that are interconnected, which allows for more flexibility and breathability.
  3. Mineral Wool Insulation: This type of insulation is non-combustible and provides excellent fire resistance. It’s made from natural materials such as rock or slag, and offers good thermal and sound insulation properties.
  4. Fiberglass Insulation: Fiberglass insulation is another non-flammable option that’s widely used. It’s made from glass fibers and offers good thermal and acoustic insulation.

Is Spray Foam Insulation Safe?

Ensure the safety of spray foam insulation by understanding its potential risks and benefits.

While spray foam insulation provides numerous advantages, it’s essential to consider its safety aspects.

One concern is its flammability. Spray foam insulation can be highly flammable, especially during installation when the chemicals are being sprayed and expanding. It’s crucial to take appropriate precautions and follow safety guidelines to minimize the risk of fire.

Another aspect to consider is indoor air quality. Improper installation or poor ventilation can lead to the release of volatile organic compounds (VOCs) from the insulation, which can negatively impact indoor air quality.

To ensure the safety of spray foam insulation, it’s recommended to consult with professionals and adhere to guidelines provided by organizations like the Consumer Product Safety Commission.

Why Should I Care If My Insulation Is Flammable?

You should care if your insulation is flammable because it can pose a significant risk to your safety and property. Here are four reasons why you should be concerned:

  1. Safety hazards: Flammable insulation increases the risk of fire in your home or building. In the event of a fire, it can accelerate the spread of flames and produce harmful smoke and toxic gases.
  2. Property damage: If your insulation catches fire, it can quickly engulf your entire structure, leading to extensive damage and potential loss of your valuable belongings.
  3. Insurance coverage: Many insurance policies have exclusions or limitations for damages caused by flammable insulation. This means that if a fire occurs, you may not be fully covered for the resulting losses.
  4. Building code compliance: Flammable insulation may not meet the requirements set by local building codes. This can lead to potential legal issues and difficulties when selling or renting your property.

To ensure your safety and comply with regulations, it’s crucial to consult with a reputable insulation contractor and choose insulation materials with a suitable fire rating.

Case Studies and Research on Spray Foam Insulation Safety

Benefits Of Using Spray Foam Insulation

When it comes to the benefits of using spray foam insulation, there’s no doubt that it outperforms other insulation options in terms of its fire-resistant properties. Spray foam insulation is an excellent choice for homeowners and businesses looking for a reliable and safe insulation material.

In addition to being fire-resistant, spray foam insulation has a long lifespan, providing long-term insulation benefits. Its ability to create an airtight seal helps to reduce energy consumption and improve energy efficiency.

Spray foam insulation also deters moisture, preventing the growth of mold and mildew. Furthermore, it enhances the comfort of your home by reducing noise infiltration and offering sound reduction.

Lastly, spray foam insulation saves homeowners money by reducing heating and cooling costs. Overall, spray foam insulation is a highly beneficial and efficient insulation option.

Comparing the Flammability of Spray Foam Insulation to Other Insulation Materials (1)

Can You Put Out A Burning Spray Foam Insulation Yourself?

To extinguish a burning spray foam insulation yourself, use a fire extinguisher specifically designed for flammable materials. It’s important to follow safety protocols when dealing with a fire involving flammable substances like polyurethane foam, as they can release toxic gases and spread rapidly. Here are four key points to consider:

  1. React quickly: Time is of the essence when dealing with a fire. Act promptly to prevent the fire from spreading and causing further damage.
  2. Use the correct fire extinguisher: Ensure that you have a fire extinguisher suitable for extinguishing flammable materials. Look for a Class B or Class A:B extinguisher, which are designed to tackle flammable liquids and gases.
  3. Aim at the base of the fire: Direct the extinguisher at the base of the flames, aiming to smother the fire and cut off its oxygen supply.
  4. Evacuate if necessary: If the fire becomes unmanageable or spreads rapidly, prioritize your safety and evacuate the area immediately, calling emergency services for assistance.

How Can Homeowners Enhance The Fire Safety Of Their Insulation?

Enhance the fire safety of your insulation by regularly inspecting and maintaining it.

As a homeowner, it’s important to understand that while spray foam insulation isn’t inherently flammable, it can contribute to the spread of fire if not properly installed or maintained.

To enhance fire safety, start by inspecting the insulation for any signs of damage, such as cracks or gaps, and repair them promptly.

Additionally, ensure that the insulation is properly sealed to prevent the passage of air, which can fuel a fire.

Regularly check for any flammable materials near the insulation and remove them to reduce the risk of ignition.

Lastly, consider installing fire-resistant barriers or coatings to provide an extra layer of protection.

Are There Alternative Insulation Materials With Lower Flammability?

If you’re concerned about the flammability of spray foam insulation, you might be interested in exploring alternative insulation materials that have lower flammability. There are several options available that can provide effective insulation while reducing the risk of fire hazards:

  1. Cellulose Insulation: Made from recycled paper, cellulose insulation is treated with fire-retardant chemicals to improve its resistance to flames.
  2. Thermal Barrier: Installing a thermal barrier, such as gypsum board or cement board, can help protect insulation materials from direct flame exposure.
  3. Fiberglass: Fiberglass insulation is inherently non-combustible, making it a safer alternative to spray foam insulation.
  4. Injection Foam: Injection foam insulation is a fire-resistant option that expands to fill gaps and cavities, providing excellent thermal insulation and reducing the risk of fire spread.

What Should Be Done In Case Of A Fire Involving Spray Foam Insulation?

If a fire involving spray foam insulation occurs, take immediate action to ensure your safety and minimize the risk of further damage.

While spray foam insulation isn’t highly flammable, it can still contribute to the spread of fire if not properly addressed. In case of a fire, the first step is to evacuate the area and call emergency services. Don’t attempt to extinguish the fire yourself unless you have received proper training and have the appropriate firefighting equipment.

It’s important to isolate the fire by closing doors and windows to limit oxygen supply. Avoid inhaling the smoke, as it may contain toxic fumes.

Foam board insulation, particularly closed cell foam, has a higher resistance to fire than open cell foam. However, it’s crucial to follow fire safety precautions and consult professionals for proper installation and protection measures.

Fire Safety Precautions and Regulations

Fire Safety Precautions and Regulations

Ensure your safety and protect your home by following strict fire safety precautions and adhering to regulations when it comes to handling and installing spray foam insulation. Fire safety regulations are in place to minimize the risk of fire incidents and ensure that proper fire safety measures are taken during installation and use of spray foam insulation.

It is crucial to familiarize yourself with these regulations and strictly adhere to them to prevent any potential fire hazards.

One important aspect of fire safety when it comes to spray foam insulation is the use of fire retardants. Fire retardants are chemicals added to the foam to increase its resistance to fire. These chemicals work by reducing the flammability of the foam, slowing down the spread of flames, and giving occupants more time to escape in case of a fire.

The effectiveness of fire retardants varies depending on the type and quality of the foam insulation used, as well as the thickness and application method. It is essential to choose a spray foam insulation product that has been properly tested and certified for its fire retardant properties.

Additionally, it is crucial to follow proper installation techniques to maintain fire safety. This includes ensuring that the foam is applied correctly and evenly, without any gaps or voids that could potentially allow flames to spread. It is also important to pay attention to the curing process, as improperly cured foam can be more susceptible to fire. Following the manufacturer’s guidelines and recommendations for installation is vital for ensuring the fire safety of your home.

Fire safety regulations and the use of effective fire retardants play a significant role in ensuring the fire safety of spray foam insulation. By following these regulations and selecting the right insulation product, you can enhance the fire resistance of your home. Additionally, proper installation techniques are crucial for maintaining fire safety.

By taking these precautions and adhering to regulations, you can enjoy the benefits of spray foam insulation while keeping your home safe from fire hazards.

Comparing the Flammability of Spray Foam Insulation to Other Insulation Materials

When it comes to insulation materials, you’ll be amazed at how spray foam compares to others in terms of its fire resistance. Spray foam insulation is known for its excellent flammability ratings and safety measures. Here are five reasons why spray foam insulation stands out in terms of its flammability comparison:

  • Spray foam insulation has a low flammability rating, making it less prone to catching fire and spreading flames compared to other insulation materials.
  • Spray foam insulation has the ability to self-extinguish, which means it will stop burning once the flame source is removed.
  • In the event of a fire, spray foam insulation releases minimal smoke compared to other materials. This can be crucial in preventing smoke inhalation and improving visibility during an emergency.
  • Spray foam insulation creates an effective barrier to heat transfer, reducing the risk of fire spreading through walls or ceilings.
  • Spray foam insulation can be easily integrated with other fire safety measures, such as fire-resistant coatings and smoke detectors, further enhancing the overall safety of a building.

To ensure maximum safety, it’s important to follow proper installation guidelines and use certified spray foam insulation products. Additionally, regular maintenance and inspections can help identify any potential fire hazards and ensure the continued effectiveness of the insulation.


Is There A Non Flammable Spray Foam Insulation?

You can find a non flammable spray foam insulation that offers effective thermal insulation for your home. This type of insulation is made from polyurethane spray foam, which is known for its excellent insulating properties. Unlike traditional spray foam insulation, which can be flammable, non flammable spray foam insulation has been specially formulated to resist fire.

Here are four key reasons why you should consider using non flammable spray foam insulation:

  1. Safety: Non flammable spray foam insulation provides peace of mind by reducing the risk of fire in your home.
  2. Protection: This insulation helps to create a barrier against heat transfer, keeping your home comfortable and energy efficient.
  3. Durability: Non flammable spray foam insulation is designed to last, providing long-term insulation and saving you money on energy bills.
  4. Versatility: This insulation can be used in various areas of your home, including walls, attics, and crawl spaces, ensuring comprehensive thermal protection throughout your living space.

Is Closed Cell Spray Foam Insulation Flammable?

Curious about the flammability of closed cell spray foam insulation?

Closed cell spray foam insulation is known for its fire-resistant properties. Due to its closed cell structure, it has a higher resistance to heat and can provide a significant barrier to flames. This type of insulation has a higher fire rating compared to open cell spray foam insulation.

Closed cell spray foam insulation is made up of cells that are tightly packed together, preventing the passage of air and reducing the risk of fire spreading. Additionally, it acts as a barrier to heat transfer, further reducing the potential for ignition.

However, it’s important to note that while closed cell spray foam insulation is less flammable, it isn’t entirely fireproof. It’s crucial to follow proper installation guidelines and building codes to ensure maximum fire protection.

Is Spray Foam Insulation Fire Retardant?

If you’re wondering about the fire retardant properties of spray foam insulation, let’s explore the facts. Here are four important points to consider:

  1. Spray foam insulation is inherently flammable: Spray foam insulation is made from two components that combine and expand to form a solid material. These components are flammable and can ignite under certain conditions.
  2. Fire retardants can be added: To improve the fire safety of spray foam insulation, fire retardant chemicals can be added during the manufacturing process. These chemicals help to reduce the material’s flammability and slow down the spread of flames in case of a fire.
  3. Fire retardant additives aren’t foolproof: While fire retardants can enhance the fire resistance of spray foam insulation, they don’t make it completely fireproof. It’s still important to take necessary precautions and follow local building codes to minimize the risk of fire.
  4. Proper installation is crucial: The effectiveness of fire retardant additives in spray foam insulation also depends on proper installation. It’s essential to hire trained professionals who understand the correct application techniques and can ensure the insulation is installed safely and securely.

Is Icynene Spray Foam Insulation Flammable

Icynene Spray Foam Insulation is flammable under certain conditions. It’s important to consider the flammability of Icynene spray foam insulation when using it in your building or home.

While Icynene is a popular choice for insulation due to its energy efficiency and air sealing properties, it’s crucial to understand its flammability characteristics. Icynene spray foam insulation is made from a chemical compound that can ignite and burn if exposed to an open flame or high heat source. However, it’s important to note that Icynene foam insulation is treated with fire retardants to help minimize its flammability.

These fire retardants can significantly reduce the risk of ignition and slow down the spread of fire. Nonetheless, it’s crucial to follow safety guidelines and building codes when installing Icynene spray foam insulation to ensure its safe and proper use.

Is Spray Foam Insulation Inherently Flammable?

Are you wondering if spray foam insulation is inherently flammable? Let’s dive into the technical details to give you a precise answer. Here are four key points to consider:

  1. Flammability: Spray foam insulation can be flammable, especially during its installation process when it’s in its uncured state. However, once the foam has fully cured, it becomes less flammable.
  2. Fire resistance: The flammability of spray foam insulation can vary depending on the specific product and its class fire rating. Some spray foam insulation products have a higher fire resistance rating, making them less likely to ignite or contribute to the spread of fire.
  3. Ignition sources: It’s important to note that any material, including spray foam insulation, can catch fire when exposed to high temperatures, open flames, or other ignition sources. Proper installation and adherence to fire safety measures are crucial to mitigate the risk of fire incidents.
  4. Building codes and regulations: Building codes often require specific fire safety measures, including the use of fire-resistant materials and proper installation techniques. Compliance with these regulations can help ensure the safe use of spray foam insulation in buildings.


In conclusion, spray foam insulation is flammable. However, by following proper safety measures and using fire-resistant materials, homeowners can minimize the risk of fire.

It’s important to consider alternative insulation materials with lower flammability if fire safety is a top priority.

In the event of a fire involving spray foam insulation, it’s crucial to follow appropriate emergency protocols to ensure the safety of everyone involved.

Like a vigilant firefighter, taking precautions can help protect your home from potential dangers.

karl-rock fire fighter

Karl Rock

Hey there, I'm Karl Rock, a dedicated firefighter with a passion for safety. Through my blog, I'm here to share crucial insights about the nature of flammability and effective ways to safeguard both lives and homes. With years of experience on the frontlines, I'll bring you valuable tips and knowledge to help you understand fire's behavior and how to prevent its devastating impact. Join me on this journey to empower yourself with life-saving information and create a safer environment for you and your loved ones. Together, we'll conquer the flames and ensure a secure future.

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