Pros and Cons of Attic Insulation Types | Attic Projects Company

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CALL NOW! San Diego: 858-246-7421 or Orange County/Los Angeles: 714-769-0228

Attic Insulation Types – Pros and Cons

Knowing the pros and cons of attic insulation types is highly beneficial when insulating your attic. With many options ideal for different situations, knowing the differences helps you choose the best insulation type for your specific needs.

Keep reading to learn about the types of insulation for the attic and their pros and cons.

What You Need to Know About Attic Insulation Types

For those wondering, “What are the different types of attic insulation?” the list includes fiberglass batt insulation, cellulose insulation, loose-fill fiberglass insulation, and spray foam attic insulation. All types of insulation an attic can have help keep heat indoors to save you from high heating bills in the winter. They also allow some heat to exit in hotter climates.

Whether you’re in a cooler coastal area or live in an area that gets blazing temperatures, it’s necessary to get the proper type of insulation for the weather your area faces. An important term to remember is the R-value. The R-value describes how good an attic insulation type is at trapping heat in the attic.

Different Types Of Attic Insulation

Types of Attic Insulation

When exploring the pros and cons of attic insulation types, it’s helpful to know why each option has lasted as a top choice over the years. The main reasons include each insulation type’s R-value, longevity, upfront costs, and other factors.

In addition to foam, fiberglass, and cellulose, there are other insulation options. However, these aforementioned options are popular for good reasons.

Fiberglass Batt Attic Insulation

Fiberglass batt insulation is a felted type of insulation that comes in rolls. Pros of using this type of insulation are its cost-effectiveness and low-effort installation requirements.  Quick installation provides an easy way to retain heat in the attic. Fiberglass batt insulation is also resistant to fire and moisture.

Unfortunately, fiberglass batts offer a poor R-value compared to other insulation types. Homeowners should avoid any option that uses a shoddy, low-effort insulation installation process, like roll-out fiberglass. Fiberglass batt insulation can be a classic case of getting what you paid for.

Cellulose Attic Insulation

Cellulose is a type of paper insulation mixed with boric acid. Regarding the pros of this type of insulation, cellulose insulation is available in bags of tightly-compressed material that are affordable and easily purchased from a hardware or home repair store.

Cons include that the ground paper material creates significant dust. It can be difficult to apply, requiring a professional application. Because of this, your installation costs could be higher.

Despite the enticing nature of boric acid as a pest repellant, this solution doesn’t actually work. Additionally, the paper material is highly absorbent, prone to mold and mildew infestation if it gets wet.

Loose-Fill Fiberglass Attic Insulation

One of the other types of insulation an attic can have is loose-fill fiberglass. With loose-fill fiberglass insulation, small pieces of fiberglass insulation come in bags that you must use a machine to blow into the attic. This is not a good choice for those looking for a DIY approach.

The pros of loose-fill fiberglass attic insulation include heat retention, cost-effectiveness, and ease of installation. It locks heat in effectively. Because of its smaller size compared to traditional fiberglass batts, it’s easier to install insulation strategically and effectively.

The cons are identical to those of fiberglass batts, those chiefly being longevity concerns and poor R-value.

Spray Foam Attic Insulation

When it comes to different types of attic insulation, spray foam requires the most precise application. This aspect can be a pro or a con depending on the user.

In the case of installing types of insulation in the attic, spray foam offers several benefits. Due to its precise installation process, you can apply it in tight corners for a water-tight seal. It’s also easy to expand your liveable space with spray foam.

Another excellent benefit is that spray foam lasts for decades. However, this poses a problem during the removal process, and spray foam is considerably more expensive than any other insulation type. You’ll need to rely on professional installers to correctly insulate your attic.

FAQs – Attic Insulation Types

What type of attic insulation is best?

Homeowners looking to save more money on long-term energy costs should choose spray foam attic insulation. Spray foam is the best type of insulation for those desiring a reliable, long-lasting result. It offers the highest level of insulation, sound protection, heat retention, and airflow blockage.

Does insulation in the attic really help?

Yes, insulation in the attic really helps. Significant amounts of heat escape through your roof; without insulation, there is no barrier keeping this heat indoors. You’ll spend your winters with a high heating bill, while summer temperatures will cut through the attic and affect your topmost floor.

A thick layer of insulation between your roof and the rest of your indoor environment ensures your living space maintains a comfortable temperature and all heat generated indoors remains where it belongs.

Is attic insulation worth the cost?

Depending on the pros and cons of attic insulation types, certain materials can be worth the cost. Spray foam is significantly more expensive than other types, but provides better protection than any other option.

While fiberglass and cellulose are less suitable insulation types, they still can benefit homeowners. You’ll need to maintain your insulation and check for mold, mildew, and other debris that can reduce your insulation’s longevity, or rely on a professional to do so for you. Regardless, installing any type of attic insulation is more beneficial than not having any at all.


If you’re still curious, further explore the pros and cons of attic insulation types with the help of Attic Projects. As your attic improvement professionals, our expert team handles all your attic insulation projects and more. We have the necessary skills to remove old or moldy insulation, thoroughly clean your attic, and install new, highly-effective insulation that helps control indoor temperature.

Contact Attic Projects in San Diego, CA, and Orange, CA, for expert service. No matter the insulation type you choose, no job is too big or small for us. Call our San Diego office for a free quote on your attic insulation installation project at 858-923-4083.

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