Is Spray Insulation Flammable

Is Spray Insulation Flammable

When it comes to insulation materials, safety is of utmost importance. Homeowners and contractors should always consider the flammability of insulation products before making a decision. In this article, we will explore the flammability of spray insulation and whether it poses a fire hazard.

Understanding Spray Insulation

Spray insulation, also known as spray foam insulation, is a popular choice for improving energy efficiency and reducing utility bills. It is made from a mixture of chemicals that expand and harden when sprayed in place.

Spray insulation is used to fill gaps, cracks, and voids, creating an airtight barrier that prevents air leakage and minimizes heat transfer. This type of insulation is commonly used in walls, roofs, attics, and other areas of residential and commercial buildings.

The Flammability of Spray Insulation

Spray insulation contains highly flammable chemicals, including isocyanates and polyols. However, once the insulation cures and dries, it becomes less flammable. The curing process usually takes a few hours or up to 24 hours, depending on the type of spray insulation used.

While the cured spray insulation is not considered highly flammable, it can still contribute to the spread of fire if not installed properly or used inappropriately. It is essential to follow the manufacturer’s instructions and building codes to ensure the insulation’s safe installation and use.

Is Spray Insulation Flammable


Fire Safety Measures

Despite the reduced flammability of cured spray insulation, it is crucial to take fire safety measures to prevent any potential fire hazards. Here are some tips to ensure the safe use of spray insulation:

  1. Follow the manufacturer’s instructions carefully during installation.
  2. Ensure proper ventilation during the curing process to allow any harmful fumes to dissipate.
  3. Seal any exposed insulation to prevent it from being exposed to potential ignition sources.
  4. Avoid installing spray insulation near heat sources, electrical wiring, or open flames.
  5. Regularly inspect the insulation for any signs of damage or deterioration.
  6. Keep fire extinguishers readily available and ensure everyone in the building knows how to use them.

By following these fire safety measures, you can minimize the risk of fire associated with spray insulation and ensure the safety of your property and its occupants.

Is Spray Insulation Flammable


Building Codes and Regulations

Building codes and regulations vary depending on the location, so it is essential to consult with local authorities and professionals before using spray insulation. These codes often specify the type of insulation allowed and provide guidelines for their safe installation.

Homeowners and contractors must adhere to these regulations to guarantee a safe and compliant installation. Failure to comply with building codes can not only pose fire hazards but also lead to legal consequences.

Frequently Asked Questions For Is Spray Insulation Flammable

Is Spray Insulation Flammable?

Spray insulation itself is not flammable, as it is made from fire-resistant materials. However, the propellant used during installation may be flammable.

What Are The Fire Safety Measures For Spray Insulation?

To ensure fire safety with spray insulation, it is important to install a proper fire-rated covering over the insulation, such as a gypsum board or intumescent coating.

Can Spray Insulation Catch Fire If Exposed?

If spray insulation is left exposed without any fire-resistant covering, it can be flammable and potentially catch fire. It is crucial to follow safety measures.

Are There Any Non-flammable Spray Insulation Options?

Yes, there are non-flammable spray insulation options available. These insulation materials are designed to be fire-resistant and provide excellent insulation properties while ensuring safety.


Spray insulation, once cured and dried, is not highly flammable. However, it is important to follow fire safety measures and building codes to ensure its safe use. Regular maintenance and inspections are also essential to identify any potential issues or damage to the insulation.

By understanding the flammability of spray insulation and taking appropriate precautions, homeowners and contractors can confidently enjoy the benefits of this energy-efficient insulation material while keeping their properties safe from fire hazards.

Updated: January 26, 2024 — 2:51 am