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Difference Between Fiberglass and Cellulose Insulation

Do you need to insulate your home? Chances are, you’ve heard of fiberglass and cellulose, two insulation materials found in many homes. Which one should you use? Many homeowners aren’t quite sure how these two types of insulation are different.

Fiberglass insulation and cellulose insulation have some similarities. For instance, both can be installed in various areas of a home, including the attic and walls. But they do have a number of differences:

  • Material: Fiberglass is made of synthetic material, while cellulose consists of organic material (mainly newspaper).
  • Color: Fiberglass insulation varies in color (pink, yellow, etc.). Cellulose insulation tends to be consistently grayish in color.
  • Performance: Both perform well, but CertainTeed’s fiberglass does not absorb or retain as much moisture and is less likely to slump and settle over time.
  • R-values: The R-values of fiberglass and cellulose are different.

Cellulose and fiberglass are similar in the sense that they are both available as blown-in insulation (blown-in cellulose is also called loose-fill cellulose). Also, they both have good soundproofing qualities.

San Antonio, TX Area Insulation Installers

Whether you need to insulate your whole home or need an attic insulation upgrade, Installed Building Products San Antonio is a good name to know. We have been insulating homes all over the San Antonio, Texas area and look forward to helping you with your project. Whatever your needs, we have you covered.

Get in touch with the team here at IBP San Antonio today to learn more about how we can insulate your home with fiberglass or cellulose (or both) to help you start saving money and living more comfortably!

Products We Install
Fiberglass Insulation

Our insulation team adds energy efficiency, comfort & value to homes & buildings.

Cellulose Insulation

We provide blown cellulose insulation solutions for residential and commercial projects.

Spray Foam Insulation

Our team installs energy-efficient spray foam insulation to keep homes and buildings more comfortable.

Radiant Barrier Insulation

We can help keep your home cooler and more comfortable with an attic radiant barrier.


We work with builders and homeowners who are looking to install new fireplaces.

Window Coverings

We are proud to offer window blinds and window shutters to our customers.


No matter your gutter needs, the IBP San Antonio team has you covered.

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