What Is Blown in Insulation Made of

Have you ever wondered what blown-in insulation is made of? Well, you’re in luck! In this article, we’ll explore the different materials used in blown-in insulation.

From fiberglass and cellulose to mineral wool and recycled materials, there are various options to choose from. You’ll also learn about synthetic fibers, foam, polystyrene, polyurethane, and vermiculite.

So, get ready to discover the ingredients behind this efficient and cost-effective insulation method.

Key Takeaways

  • Blown-in insulation can be made from various materials such as fiberglass, cellulose, mineral wool, and synthetic fibers.
  • It offers excellent thermal resistance and has a higher R-value compared to other types of insulation.
  • Blown-in insulation is effective in reducing energy consumption and utility bills, provides soundproofing properties, and is environmentally friendly.
  • The installation process is easy, and it can be applied to walls, roofs, and floors in both new construction and retrofitting projects.


Fiberglass is a common material used in blown-in insulation, and it provides excellent thermal resistance. When it comes to material composition breakdown, fiberglass insulation is made from tiny strands of glass that are spun into fibers. These fibers are then processed and formed into loose-fill insulation that can be blown into walls, attics, and other hard-to-reach areas.

Compared to other types of blown-in insulation, fiberglass has a higher R-value, which means it offers better insulation performance. This is because the air pockets trapped within the fiberglass fibers help to slow down the transfer of heat.


You’ll find that cellulose is an eco-friendly alternative for blown-in insulation. It’s made from recycled paper products, making it a sustainable choice for homeowners.

Here are some interesting facts about cellulose insulation:

  • Cellulose production involves recycling newspapers, cardboard, and other paper waste, reducing landfill waste.
  • It’s treated with fire retardants to enhance its safety and performance.
  • Cellulose insulation is highly effective in reducing energy consumption and lowering utility bills.
  • It’s known for its excellent soundproofing properties, making it ideal for homes located near busy streets or airports.
  • Cellulose insulation has a lower carbon footprint compared to other insulation materials, contributing to a healthier environment.

Mineral Wool

Mineral wool is a versatile and effective insulation material. It is known for its excellent fire resistance and sound absorption capabilities. If you’re looking for alternatives to mineral wool insulation, you might be wondering why it’s such a popular choice in the first place.

Well, let me tell you about its advantages.

Firstly, mineral wool is made from natural minerals, such as basalt or diabase, which makes it an environmentally friendly option. It also has a high melting point, which means it can withstand extreme temperatures without losing its effectiveness. Additionally, mineral wool is moisture resistant, preventing the growth of mold and mildew.

Lastly, mineral wool provides excellent thermal insulation, keeping your home warm in the winter and cool in the summer.

Recycled Materials

If you’re looking for an eco-friendly option, consider insulation materials made from recycled materials. These materials not only help reduce waste but also have a positive environmental impact.

Here are five reasons why you should consider using insulation made from recycled materials:

  • Reduced carbon footprint: By using materials that are already in existence, you’re reducing the need for new resources and minimizing the energy required for production.

  • Energy efficiency: Recycled insulation materials have excellent thermal properties, which can help keep your home warm in the winter and cool in the summer, leading to energy savings.

  • Waste reduction: By using recycled materials, you’re diverting waste from landfills, contributing to a more sustainable future.

  • Cost-effective: Recycled insulation materials often come at a lower cost compared to traditional options, allowing you to save money while being environmentally conscious.

  • High performance: Insulation made from recycled materials is designed to provide effective insulation and soundproofing, ensuring a comfortable and energy-efficient living space.

Consider the environmental impact and energy efficiency benefits of using insulation made from recycled materials for a greener and more sustainable home.

Synthetic Fibers

Synthetic fibers, like polyester and nylon, offer numerous advantages when it comes to insulation. They’re lightweight, durable, and resist moisture, making them ideal for keeping you warm and dry.

In addition, synthetic fibers have excellent insulating properties, helping to trap heat and maintain a comfortable temperature in your home or clothing.

Material Composition Breakdown

You can easily find out what blown in insulation is made of by looking at its material composition breakdown. Blown in insulation, also known as loose-fill insulation, is made from a variety of materials that provide excellent thermal resistance and energy efficiency. Here are five key components commonly used in the manufacturing of blown in insulation:

  • Fiberglass: Made from recycled glass and sand, fiberglass insulation is one of the most common types used. It’s effective in reducing heat transfer and offers good soundproofing capabilities.

  • Cellulose: Made from recycled paper products, cellulose insulation is environmentally friendly and has excellent fire resistance properties.

  • Mineral Wool: Made from molten rock or slag, mineral wool insulation is durable, non-combustible, and provides excellent thermal and sound insulation.

  • Foam: This type of insulation is made from expanding foam, which fills gaps and seals air leaks effectively.

  • Cotton: Cotton insulation is made from recycled denim and offers good thermal performance while being environmentally friendly.

These materials used in blown in insulation not only provide effective insulation but also have a minimal environmental impact, making them a great choice for energy-efficient homes.

Insulation Performance Comparison

When comparing insulation performance, it’s important to consider factors such as thermal resistance, soundproofing capabilities, and fire resistance properties. Insulation types vary in their ability to provide these features.

One way to compare insulation performance is by looking at the R-value. The R-value measures the insulation’s resistance to heat flow. The higher the R-value, the better the insulation’s thermal resistance.

Different insulation types have different R-values. For example, fiberglass batt insulation typically has an R-value of around 3.2 to 4.3 per inch, while blown-in cellulose insulation has an R-value of around 3.2 to 3.8 per inch.


Foam insulation is a popular choice for homeowners looking for effective insulation solutions. It offers several benefits, including excellent thermal performance and air sealing capabilities.

When it comes to installation, foam insulation can be sprayed or injected into the desired area, making the process quick and efficient.

Insulation Material Options

One popular option for insulation material is blown-in fiberglass, which offers excellent thermal performance and is resistant to moisture. Blown-in fiberglass insulation is made of tiny glass fibers that are blown into the space using a special machine.

Here are five reasons why blown-in fiberglass is a great choice for insulation:

  • Cost-effective: Blown-in fiberglass insulation is relatively affordable compared to other insulation materials.

  • Energy-efficient: It helps reduce heat loss or gain, leading to lower energy bills.

  • Easy installation: The blown-in technique allows for quick and efficient installation in hard-to-reach areas.

  • Environmentally friendly: It contains recycled materials and has a lower environmental impact compared to other insulation options.

  • Soundproofing: Blown-in fiberglass also helps reduce noise transmission, creating a quieter living environment.

Consider blown-in fiberglass insulation for its cost-effectiveness, energy efficiency, easy installation, environmental friendliness, and soundproofing capabilities.

Benefits of Foam Insulation

Consider the benefits of foam insulation, such as its superior insulation properties and ability to seal cracks and gaps effectively.

Foam insulation offers numerous advantages when it comes to insulating your home or building. One of the main advantages is its excellent insulation capabilities. Foam insulation has a high R-value, which means it can effectively resist heat flow and keep your indoor space comfortable all year round.

Additionally, foam insulation is known for its ability to seal cracks and gaps, preventing air leakage and reducing energy loss. This makes it a great choice for both new construction and retrofitting projects.

Foam insulation can be applied to various areas, including walls, roofs, and floors, providing a versatile solution for different applications.

Installation Process and Cost

You’ll be pleased to know that the installation process for foam insulation is straightforward and the cost is reasonable compared to other insulation options.

Here are five reasons why foam insulation is a great choice for your home:

  • Easy installation techniques: Foam insulation can be easily sprayed or injected into walls, attics, and other areas in your home, ensuring a seamless and efficient installation process.

  • Energy savings: Foam insulation creates a tight seal, preventing air leaks and reducing energy loss. This can lead to significant savings on your heating and cooling bills.

  • Enhanced comfort: By eliminating drafts and maintaining a consistent temperature, foam insulation helps create a more comfortable living environment.

  • Soundproofing properties: Foam insulation has excellent sound-dampening qualities, reducing noise from outside and between rooms.

  • Long-lasting performance: Foam insulation is durable and resistant to moisture and pests, ensuring that it will provide insulation benefits for years to come.

With its easy installation process and cost-effectiveness, foam insulation is a smart choice for both energy savings and comfort in your home.


Polystyrene is a common material used in blown-in insulation. It has excellent insulation properties, making it an ideal choice for keeping your home warm in the winter and cool during the summer.

The small particles of polystyrene are blown into the walls, attic, or crawl spaces of your home, creating a barrier that helps to reduce heat transfer. This insulation material has a high R-value, which means it provides a significant amount of thermal resistance.

Not only does polystyrene insulation help to improve the energy efficiency of your home, but it also has a minimal environmental impact. It’s made from recycled materials and can be recycled again at the end of its life, reducing waste and contributing to a more sustainable future.


Polyurethane foam is another popular choice for insulation in homes because of its excellent thermal resistance and versatility. With polyurethane, you can enjoy the following benefits:

  • Superior insulation properties: Polyurethane foam has a high R-value, meaning it provides exceptional thermal resistance, keeping your home warm in the winter and cool in the summer.
  • Energy efficiency: By reducing heat transfer, polyurethane insulation helps lower your energy consumption and saves you money on utility bills.
  • Air sealing: Polyurethane foam expands to fill gaps and cracks, creating a seamless barrier against air leakage and preventing drafts.
  • Moisture resistance: Unlike other insulation materials, polyurethane is resistant to moisture, reducing the risk of mold and mildew growth.
  • Easy installation: Polyurethane foam can be blown or sprayed into cavities, conforming to any shape or size, making it a convenient choice for insulating hard-to-reach areas.

When it comes to the installation process, a professional contractor typically uses specialized equipment to blow or spray the polyurethane foam into the desired areas. The foam expands and hardens within minutes, providing an effective and long-lasting insulation solution for your home.


Vermiculite is a natural mineral that’s often used as a lightweight aggregate in construction materials. It offers excellent insulation properties and is commonly used in blown-in insulation.

However, due to health concerns associated with the presence of asbestos in some vermiculite deposits, alternatives have been sought after.

If you’re considering using vermiculite as insulation, it’s essential to be aware of the potential health risks. Some vermiculite deposits have been found to contain asbestos, a mineral fiber known to cause serious lung diseases. Therefore, it’s crucial to choose vermiculite that has been tested and certified asbestos-free.

If you prefer to avoid using vermiculite altogether, there are alternative insulation materials available. These include cellulose insulation, fiberglass insulation, and mineral wool insulation. These alternatives offer similar insulating properties and are considered safer options for use in construction materials.

When deciding which insulation material to use, it’s important to weigh the benefits and potential health concerns associated with each option. Consulting with a professional can help you make an informed decision that suits your specific needs and preferences.

Frequently Asked Questions

How Effective Is Blown-In Insulation Compared to Other Types of Insulation?

Blown-in insulation is very effective compared to other types. It provides excellent energy savings potential. The material used is usually cellulose or fiberglass, which is blown into the walls or attic space.

Can Blown-In Insulation Be Used in All Areas of a Home, Including the Attic and Walls?

Yes, blown-in insulation can be used in all areas of your home, including the attic and walls. It is an effective and efficient way to insulate your home and keep it comfortable.

Is Blown-In Insulation Environmentally Friendly?

Blown-in insulation is environmentally friendly and offers energy efficiency benefits. It can be installed in existing homes by a professional who uses a machine to blow the insulation into the desired areas.

What Is the Cost of Installing Blown-In Insulation Compared to Other Options?

The cost of installing blown-in insulation is relatively low compared to other options, making it a cost-effective choice. Additionally, it provides excellent energy savings, making it a practical and efficient solution for insulation needs.

How Long Does Blown-In Insulation Typically Last Before Needing to Be Replaced?

Blown-in insulation can last for decades if properly installed and maintained. Signs of replacement include decreased energy efficiency, mold growth, and pest infestations. Regular inspections can help identify these issues.