How to Choose the Right Type of Blown-In Attic Insulation for Your Home

Blown-in attic insulation is an effective solution for improving energy efficiency and thermal performance in your home. With various types of blown-in insulation available, choosing the right one can be a daunting task. In this guide, we will walk you through the key factors to consider when selecting the appropriate type of blown-in attic insulation for your home.


Insulation Material Options

There are several types of blown-in insulation materials commonly used in attics. The most popular options include fiberglass, cellulose, and mineral wool.

– Fiberglass: Fiberglass insulation consists of fine glass fibers and is known for its excellent thermal resistance. It is non-combustible, moisture-resistant, and does not promote mold growth. Fiberglass insulation is available in loose-fill form for blown-in applications.

– Cellulose: Cellulose insulation is made from recycled paper treated with fire-retardant chemicals. It has good thermal performance and offers superior soundproofing capabilities. Cellulose is a popular choice due to its eco-friendly nature and ability to conform to irregular spaces.

– Mineral Wool: Mineral wool insulation is made from spun fibers of minerals, such as rock or slag. It provides excellent fire resistance and soundproofing properties. Mineral wool insulation is moisture-resistant and does not promote the growth of mold or pests.

Consider the specific characteristics of each material and evaluate their suitability for your home’s insulation needs.


R-Value Requirements

The R-value measures the insulation’s thermal resistance and its ability to resist heat transfer. It is an essential factor to consider when selecting blown-in attic insulation. The appropriate R-value for your home depends on factors such as climate zone, local building codes, and desired energy efficiency.

Check the recommended R-value guidelines for your region and consult with insulation professionals to determine the appropriate level of insulation needed for your attic space. Blown-in insulation has different R-values per inch depending on the material, so ensure that the chosen material meets or exceeds the recommended R-value for your home.


Application Method

Blown-in insulation can be installed using different application methods, depending on your attic’s characteristics and access points.

– Loose-Fill Blown-In Insulation: This method involves blowing loose insulation material, such as fiberglass or cellulose, into the attic using specialized equipment. Loose-fill insulation is ideal for irregularly shaped or hard-to-reach areas.

– Dense-Pack Blown-In Insulation: In this method, the insulation material is densely packed into the attic cavity, providing higher R-values and improved air sealing. Dense-pack insulation is suitable for areas with obstructions or where settling of loose-fill insulation may be a concern.

Consider the accessibility of your attic and discuss the application method with insulation professionals to determine the most suitable approach for your specific needs.


Moisture Resistance and Mold Prevention

Moisture resistance is a crucial factor when choosing blown-in attic insulation. Proper moisture control helps prevent mold growth, moisture-related damage, and potential health issues. Evaluate the moisture resistance properties of the insulation material you are considering.

Cellulose insulation is often treated with fire-retardant chemicals that also enhance its moisture resistance. Fiberglass insulation, by nature, does not absorb moisture. Mineral wool insulation is naturally hydrophobic and resistant to moisture absorption. Choose an insulation material that is known for its moisture resistance and mold prevention capabilities.


Fire Safety

Fire safety is a significant consideration when selecting blown-in insulation for your attic. Look for insulation materials that are treated with fire-retardant chemicals or have inherent fire-resistant properties. Ensure that the chosen insulation material complies with local fire safety codes and regulations to enhance the overall safety of your home.


Professional Installation

Blown-in attic insulation requires professional installation for optimal results. Hiring experienced insulation contractors ensures that the insulation is installed correctly and evenly, maximizing its effectiveness. Look for reputable insulation professionals with experience in installing blown-in insulation and verify their credentials and certifications.



Choosing the right type of blown-in attic insulation is crucial for improving energy efficiency and comfort in your home. Consider the insulation material options, R-value requirements, application method, moisture resistance, fire safety, and professional installation when making your decision.

Consult with insulation professionals to assess your specific insulation needs and receive expert guidance. By selecting the appropriate blown-in insulation, you can enhance the energy efficiency, comfort, and overall performance of your home while enjoying long-term cost savings.

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