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Spray Foam vs. Fiberglass: Which Insulation Solution is the Best?

spray foam vs fiberglass

Are you considering updating your home insulation and wondering which option suits your needs? The choice between spray foam and fiberglass insulation can be difficult, as both have unique advantages and disadvantages. This blog summarizes all the essential information to help you decide which insulation suits your home.

What is Fiberglass Insulation?

Fiberglass batt insulation is a widely used type made from sand and glass fibers. It is commonly used in commercial and residential construction to regulate indoor temperatures.

Fiberglass batts are available in various thicknesses and densities, making them versatile for different applications. DIY enthusiasts often choose fiberglass insulation due to its relatively easy installation process. However, it’s essential to note that fiberglass insulation can irritate the skin and lungs, so proper precautions should be taken when handling it.

Advantages of Fiberglass Insulation

Following are the benefits of installing Fiberglass Insulation;

Cost-effective: Fiberglass insulation is generally more affordable than other insulation options, making it an attractive choice for budget-conscious homeowners.

Easy to install: Its DIY-friendly installation process can save labor costs if you’re comfortable tackling the project yourself.

Versatility: Fiberglass batts are available in various sizes and thicknesses, allowing for flexibility in fitting different spaces.

Disadvantages of Fiberglass Insulation

Following are the downsides of installing Fiberglass Insulation;

Irritation: Fiberglass can cause skin and respiratory irritation during installation, so safety precautions are crucial.

Lower R-value: Fiberglass generally has a lower R-value than spray foam insulation, which affects its overall insulating performance.

Susceptible to settling: Fiberglass insulation may settle or sag over time, reducing its effectiveness.

What is Spray Foam Insulation?

Spray foam insulation is a liquid chemical, often polyurethane-based, that expands and hardens into a solid material after application. It is known for creating an airtight seal, making it highly efficient at reducing heat loss and preventing drafts.

There are two sorts of spray foam insulation:

Open-cell foam: Composed of broken cells that fill with air, open-cell foam is softer and less structurally stiff than closed-cell foam.

Closed-cell foam: Closed-cell foam forms cohesive cells filled with gas, providing stronger resistance to pressure and better insulation.

Advantages of Spray Foam Insulation

Following are the benefits of installing Spray Foam Insulation;

High R-value: Spray foam insulation generally has a higher R-value than fiberglass, resulting in better thermal performance and energy efficiency.

Airtight seal: Its ability to create an airtight seal minimizes air leakage, enhancing indoor comfort and reducing energy bills.

Durable: Spray foam insulation is long-lasting and does not degrade or shrink over time, maintaining its effectiveness for years.

Disadvantages of Spray Foam Insulation

Following are the disadvantages of installing Fiberglass Insulation;

Higher cost: Spray foam insulation is typically more expensive than fiberglass, but its energy-saving benefits may offset the initial investment.

Professional installation required: Unlike fiberglass, spray foam insulation necessitates professional installation, which adds to the overall cost.

Environmental concerns: Some types of spray foam release environmental toxins, making fiberglass a greener option in comparison.

Benefits of Hiring a Professional to Install Insulation at Home

Here are several benefits of hiring a professional to install insulation at home:

Knowledge of Insulation Materials: Insulation contractors know various insulation materials and can recommend the best options based on your climate, home design, and specific needs. They understand which products are most effective, ensuring you get the highest performance and energy savings.

Guaranteed Fit: Hiring professionals ensure that the insulation is properly fitted and installed, reducing the chances of potential issues and ensuring optimal insulation performance.

Dealing with Potential Obstacles: Insulation contractors have the skills and knowledge to handle obstacles such as cutting batts to fit oddly shaped joists or dealing with steel studs, ensuring a seamless installation process.

Compliance with Regulations: Professionals are aware of local regulations and codes related to insulation installation, ensuring that the work complies with the law.


Ultimately, the best thermal insulation solution depends on your budget, needs, and environmental preferences. Consulting with insulation experts can help you make an informed decision tailored to your home and requirements. Whether you choose fiberglass or spray foam, upgrading your insulation will enhance your home’s energy efficiency and comfort for years.

Still unsure about the best insulation solution for your home? Let the experts help you decide! Get in touch with Spray Foam Experts at (347) 682-2662 and benefit from our years of experience and knowledge. From spray foam to fiberglass, we’ll guide you towards the most effective and cost-efficient choice. Take the first step towards a well-insulated home and contact us today!

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