Which Is Better Cellulose or Fiberglass Blown-In Insulation

Are you considering insulation for your home? Wondering whether cellulose or fiberglass blown-in insulation is the better choice? Look no further!

In this article, we’ll break down the key factors to help you make an informed decision. We’ll compare the R-Value, consider the environmental impact, explore the installation process, evaluate soundproofing abilities, and discuss cost considerations.

By the end, you’ll have a clear understanding of which insulation option is best for you.

Key Takeaways

  • Cellulose insulation generally has a higher R-value per inch compared to fiberglass insulation.
  • Cellulose insulation is made from recycled materials and requires less energy to manufacture, making it more environmentally friendly.
  • Blown-in insulation, whether cellulose or fiberglass, provides better soundproofing and reduces heat loss and gain.
  • Cellulose insulation tends to be cheaper than fiberglass insulation, making it a more cost-effective option.

R-Value Comparison

If you’re comparing R-values between cellulose and fiberglass blown-in insulation, cellulose generally has a higher R-value per inch. This means that cellulose insulation provides better thermal resistance than fiberglass insulation.

Thermal resistance is a measure of how well a material can resist the transfer of heat. The higher the R-value, the better the insulation’s ability to keep heat inside during the winter and outside during the summer.

The higher R-value of cellulose insulation means it can effectively reduce heat loss or gain, making it more energy efficient compared to fiberglass insulation.

With better thermal resistance, cellulose insulation helps maintain a comfortable temperature in your home while also reducing your energy consumption and utility bills.

Environmental Impact

You should consider the environmental impact when choosing between cellulose and fiberglass blown-in insulation. Both options have their own sustainability benefits and energy efficiency advantages. Here’s why:

  • Cellulose insulation:

  • Made from recycled materials, such as newspaper and cardboard.

  • Requires less energy to manufacture compared to fiberglass.

  • Reduces landfill waste by repurposing recycled materials.

  • Fiberglass insulation:

  • Made from sand and recycled glass.

  • Provides excellent thermal insulation and soundproofing.

  • Can be easily recycled and reused after its lifespan.

Considering the sustainability benefits, cellulose insulation may be a more environmentally friendly option due to its use of recycled materials and lower manufacturing energy requirements. However, fiberglass insulation offers its own benefits and can still contribute to energy efficiency in your home.

Ultimately, the choice depends on your specific needs and priorities.

Installation Process

Installing blown-in insulation involves a professional contractor using specialized equipment to evenly distribute the insulation material throughout the desired areas of your home. This method offers numerous benefits for your home’s energy efficiency and comfort.

Blown-in insulation helps to reduce heat loss during the winter and heat gain during the summer, ultimately lowering your energy bills. It also provides better soundproofing, making your living spaces quieter. Additionally, blown-in insulation is more effective at filling gaps and cavities, ensuring a more complete and consistent coverage.

As for maintenance requirements, blown-in insulation typically requires less attention compared to other types of insulation. It doesn’t settle or sag over time, meaning you don’t have to worry about it losing its effectiveness.

Soundproofing Abilities

With blown-in insulation, you’ll notice a significant reduction in noise from outside, creating a quieter and more peaceful living environment. This is because blown-in insulation, whether cellulose or fiberglass, has excellent acoustic performance and is highly effective in noise reduction.

Here are three reasons why blown-in insulation is great for soundproofing:

  • Dense and compact: Blown-in insulation fills every nook and cranny, creating a barrier that absorbs and blocks sound waves.

  • Seamless installation: Unlike traditional batt insulation, blown-in insulation is installed using a blowing machine, ensuring a seamless and consistent layer that minimizes sound transmission.

  • Increased mass: Both cellulose and fiberglass blown-in insulation add mass to your walls and ceilings, which helps to dampen sound vibrations.

Cost Considerations

When considering blown-in insulation for soundproofing, it’s important to factor in the cost of materials and installation.

Both cellulose and fiberglass insulation have their own unique costs. Cellulose insulation tends to be cheaper than fiberglass, making it a more cost-effective option.

However, you should also consider the long-term benefits of energy efficiency and maintenance requirements.

Fiberglass insulation has better energy efficiency, as it provides a higher R-value per inch compared to cellulose. This means that fiberglass can better reduce heat transfer and lower energy costs over time.

Additionally, fiberglass insulation requires less maintenance compared to cellulose. It doesn’t settle or degrade as easily, ensuring that your insulation remains effective for longer periods.

Frequently Asked Questions

How Does Cellulose Insulation Compare to Fiberglass in Terms of Fire Resistance and Safety?

When comparing cellulose and fiberglass insulation, consider fire resistance, safety, and performance. Cellulose insulation is made from recycled paper and treated to be flame retardant, providing excellent fire resistance.

Can Cellulose or Fiberglass Insulation Cause Any Health Concerns for Homeowners or Installers?

When it comes to health concerns and installation safety, both cellulose and fiberglass insulation have their pros and cons. It’s important to consider factors like dust, off-gassing, and proper installation techniques to minimize any potential risks.

Are There Any Specific Building Codes or Regulations That Dictate the Use of Cellulose or Fiberglass Insulation?

Building code requirements and industry standards dictate the use of cellulose or fiberglass insulation. It is important to comply with these regulations to ensure the safety and efficiency of your insulation installation.

Can Either Cellulose or Fiberglass Insulation Be Easily Removed or Replaced if Necessary?

If you need to remove or replace insulation, both cellulose and fiberglass can be easily taken out and replaced. The removal process is straightforward and the ease of replacement makes it a convenient choice.

Is There Any Difference in the Durability or Lifespan of Cellulose and Fiberglass Blown-In Insulation?

When comparing the durability of cellulose and fiberglass blown-in insulation, there is a difference in their lifespan. Fiberglass tends to have a longer lifespan compared to cellulose insulation.


In conclusion, when it comes to choosing between cellulose and fiberglass blown-in insulation, both options have their advantages and disadvantages.

Cellulose offers a higher R-value and better soundproofing abilities. It is made from recycled materials, such as newspaper, and is treated with fire-retardant chemicals to improve safety. Cellulose insulation is effective at reducing heat transfer and can help lower energy costs. However, it can be prone to settling over time, which may reduce its effectiveness.

On the other hand, fiberglass insulation is easier to install and has a lower environmental impact. It is made from glass fibers and is available in both batt and blown-in forms. Fiberglass insulation is resistant to moisture and does not settle over time. It is also more affordable compared to cellulose insulation. However, fiberglass insulation has a lower R-value and may not provide the same level of soundproofing as cellulose.

The decision ultimately depends on your specific needs, budget, and priorities. If you prioritize high R-value and soundproofing, cellulose insulation may be the better choice. If ease of installation and affordability are more important to you, fiberglass insulation may be the preferred option.

Consider consulting with a professional to determine the best insulation choice for your project. They can assess your specific needs, provide expert advice, and ensure the insulation is properly installed for optimal performance.