Skip to main content

Home insulation is one of those things we often take for granted, but it plays a crucial role in keeping our homes comfortable, energy-efficient, and safe. If you’re considering using fiberglass insulation or already have it installed, you might be wondering about its flammability. The good news is that fiberglass insulation is generally non-flammable, but there’s more to the story than a simple yes or no answer.

To ensure you’re able to make the most informed decision about home insulation, let’s explore the details of fiberglass insulation, its fire safety, and industry standards.

What is Fiberglass Insulation?

Fiberglass insulation is a popular choice for many homeowners due to its excellent thermal properties and cost-effectiveness. It’s made from fine glass fibers that are bonded together using a special binding agent. The resulting material is a fluffy, wool-like substance that excels at trapping air, making it an ideal thermal insulator.

In residential buildings, fiberglass insulation is commonly used to insulate walls, attics, and crawl spaces. It helps maintain a comfortable indoor temperature year-round while reducing energy costs.

Fiberglass insulation is not typically flammable.

Fiberglass Insulation and Fire Safety

The good news is that the glass fibers in fiberglass insulation are non-combustible. That means they won’t ignite, burn, or contribute to the spread of flames during a fire. However, it’s important to note that some fiberglass insulation products’ binding agents and facings may have different fire safety characteristics.

To ensure fiberglass insulation meets strict fire safety standards, manufacturers put their products through rigorous testing, such as the ASTM E84 standard. This test evaluates the insulation’s flame spread and smoke development properties, assigning a rating based on its performance. Proper installation is also important, as gaps or compressions can reduce the insulation’s fire-resistant properties.

Advantages of Fiberglass Insulation in Fire Situations

One of the most significant advantages of fiberglass insulation is that it doesn’t fuel the spread of fire.

This type of insulation can help contain flames within a single room or area, slowing the progression. This extra time can be life-saving, allowing occupants to evacuate safely and giving firefighters a better chance to control the blaze.

Plus, fiberglass insulation doesn’t emit toxic fumes when exposed to heat, making it a safer choice for both inhabitants and first responders during a fire emergency.

Regular checks to fiberglass insulation and replacing when necessary help prevent flammable buildup.

Other Recommended Maintenance

To keep your fiberglass insulation in top condition and maintain its fire safety properties, regular maintenance is a must. Inspect your insulation periodically for any signs of damage, such as tears, compressions, or settling.

Also, efficient ventilation is essential to prevent moisture buildup, which can degrade the insulation over time. If you notice any issues or your insulation is more than 15 years old, consider replacing or adding new insulation.

When to Call a Professional

Sometimes, it’s best to call in a professional. If you think your insulation has damage from pests, moisture, or age, don’t wait. They can assess your home’s insulation and provide personalized recommendations for repairs or replacement. Lastly, if you’re planning a major renovation or insulation upgrade, working with a professional ensures that the job is done right, safely, and in compliance with local building codes.


When it comes to fire safety, fiberglass insulation proves to be a reliable ally. Its non-combustible glass fibers and ability to contain flames make it a smart choice for homeowners seeking to enhance their home’s fire safety. However, remember that the key to maximizing the non-flammable properties of fiberglass insulation lies in proper installation and regular maintenance.

Don’t let damaged or outdated insulation compromise your home’s fire safety. If you have questions or concerns about your existing insulation or need expert eyes on another component of your home, reach out to American Property Inspections in and around Orlando, FL.

Leave a Reply