• 600 S. Vincent Ave. Azusa, CA 91702
Proudly Serving All of California (800) 707-9278

What is the difference between fiberglass and cellulose?

With home heating and cooling costs continually rising, homeowners are constantly looking for new ways to save money on natural gas and electricity costs. One way to help you save on your energy bills is to install insulation. However, choosing the right insulation can be tricky. Two popular types of insulation you have probably heard of are cellulose and fiberglass. What is the difference between fiberglass and cellulose insulation and which is right for your home?

What is Fiberglass Insulation?

Fiberglass insulation is made of synthetic material, composed of extremely thin glass fibers. Insulation for residential use comes in rolls that fit between standard house beams and also as loose-fill insulation that can be blown into hard-to-reach spaces and existing walls.

Benefits of using fiberglass insulation include its light weight, its relatively low cost and its ease of installation. Fiberglass insulation made with recycled glass is increasingly available, making it a good choice for homeowners interested in using “green” building products.

Although it has a naturally neutral color, most fiberglass insulation is pink.

What is Cellulose Insulation?

Made from recycled material—usually paper, cardboard, newspapers and other paper products—cellulose insulation is most commonly available as blown-in insulation, used to insulate existing walls and hard-to-reach spaces.

Cellulose insulation is the ultimate eco-friendly insulation product—in fact, it is made of up to 85 percent recycled material. In addition to its being “green,” cellulose insulation has a high R-value (the measure of how well it resists heat transfer).

Quick Comparison

The main similarities between fiberglass and cellulose insulation are:

  • Soundproofing
  • Environmentally friendly characteristics
  • Blown-in installation
  • Works in a variety of areas (walls, attic, etc.)

 The main differences between fiberglass and cellulose insulation are:

  • Organic vs. synthetic materials
  • Color (fiberglass is pink and cellulose is more neutral in color – usually a grayish white)
  • R-value and weight

Need to Re-Insulate Your Home?

If you’re ready to add new insulation to help you save money, let OJ Insulation answer your questions and help you choose the right insulation for your Southern California home! Feel free to contact us.

Where should you insulate in your home? Check out our interactive infographic:

Home Insulation

We insulate attics, walls and crawl spaces.

Commercial Insulation

We insulate warehouses, offices, studio spaces & more.

Insulation Removal

Do you need to remove old insulation? We can help.


We work with builders to install fireplaces.

Are You Sure?
You are about to leave OJ Insulation and enter a third-party site. OJ Insulation and Installed Building Products have no control over, and accept no liability, obligation, or responsibility for, the contents or performance of other websites. Any such link does not constitute an endorsement or any representation regarding, the linked website, its content, its owner, its performance, its owner’s products or services, or any forward-looking statements found in.
Leave Page