The Benefits of Blown Insulation and Understanding R-Values

As an expert in the field of insulation, I have seen a growing trend towards the use of blown insulation, specifically cotton insulation with an R-value of 3.4 per inch. This type of insulation, also known as denim insulation, is becoming a popular alternative to traditional blocks and rolls. Its loose fill nature makes it easy to apply, as it can be blown into attics and cavities in finished walls that require insulation. One of the key factors to consider when choosing the right blown insulation for your project is its R-value. This value represents the material's ability to resist heat flow, with a higher R-value indicating better insulation performance.

In this article, I will delve into the specifics of R-values for blown insulation and how they can help you determine the appropriate thickness for your project.

The R-Value of Blown Cellulose Insulation

When it comes to blown insulation, each type has its own unique R-value per inch. However, blown cellulose stands out with the highest insulation capacity of R-3.4 per inch. This means that for every inch of blown cellulose insulation, you can expect an R-value of 3.4.This high R-value is due to the material's composition, which is primarily made up of recycled paper fibers treated with fire-retardant chemicals. These fibers are densely packed together during installation, creating a barrier that effectively slows down heat transfer.

Using R-Values to Calculate Insulation Thickness

Now that we understand the significance of R-values for blown insulation, let's explore how they can help us determine the appropriate thickness for our project.

The table below illustrates the R-values for various types of blown insulation, including cellulose, fiberglass, and mineral wool.

Insulation TypeR-Value per Inch
Blown Cellulose3.4
Blown Fiberglass2.2 - 2.7
Blown Mineral Wool3.0 - 3.3
Using this table, we can easily calculate the thickness of blown insulation needed for a specific R-value. For example, if we want to achieve an R-value of 12, we would need approximately 3.5 inches of blown cellulose insulation (12 divided by 3.4).It's important to note that these R-values are based on ideal conditions and may vary depending on factors such as installation technique and settling of the material over time. It's always best to consult with a professional to determine the appropriate thickness for your specific project.

The Benefits of Blown Insulation

In addition to its high R-value, blown insulation offers several other benefits that make it a popular choice among homeowners and contractors alike. These include:
  • Easy application: As mentioned earlier, blown insulation can be easily applied in attics and finished walls without the need for cutting or fitting.
  • Energy efficiency: With its high R-value, blown insulation can significantly reduce heat loss and improve energy efficiency in a building.
  • No air gaps: The loose fill nature of blown insulation allows it to fill in all gaps and crevices, creating a more effective barrier against heat transfer.

In Conclusion

In summary, blown insulation, specifically blown cellulose with an R-value of 3.4 per inch, is a popular and effective choice for insulation projects.

Its high R-value, easy application, and energy efficiency make it a top choice for homeowners and contractors alike. By understanding the R-values of different types of blown insulation, you can accurately calculate the thickness needed for your project and achieve optimal insulation performance.

Myron Valasco
Myron Valasco

Tv guru. Avid internet enthusiast. Professional social media enthusiast. Friendly bacon specialist. Wannabe zombie aficionado.

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