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Spray Foam vs. Fiberglass Insulation

Fiberglass insulation and foam insulation both have a number of advantages and are great materials for a variety of projects.

For decades, fiberglass has been the go-to material for home insulation and there’s something to be said for that. However, it’s certainly not the only option. Spray foam is an up-and-coming insulation material you might be interested in. If you’re wondering which type of insulation wins in the battle of spray foam vs. fiberglass, learn how they compare in different areas.

Uses and Cost

Fiberglass most commonly comes in batts or rolls. These are available in standard dimensions meant to fit between wall studs, attic floor rafters and ceiling joists. You can also install blown-in fiberglass for irregularly sized spaces. Since fiberglass tends to be less expensive and readily available, you can insulate your entire home at an affordable price.

Spray foam is applied in a liquid state and expands into hard, thick foam. You can install spray foam insulation anywhere, from entire stretches of wall to tiny holes around electrical wiring penetrations. It is ideal for smaller and irregularly shaped areas because of its total coverage.


Traditional fiberglass has a heat flow resistance, or R-value, of R-3 per inch of thickness. Manufacturers also produce medium- and high-density fiberglass batt insulation with slightly higher R-values than the standard batts. When space is limited spray foam can be preferred to compressing fiberglass, but CertainTeed’s fiberglass insulation is one of the most effective materials at maintaining its R-value over time. It won’t settle or sag easily.


Fiberglass insulation is made of extremely fine glass fibers. Loose-fill fiberglass is made from molten glass that is spun or blown into fibers. Most manufacturers use 20 to 30% recycled glass content. Spray foam is typically made of polyurethane, which is a foam insulation material containing a low-conductivity gas in its cells.

Fiberglass & Spray Foam Insulation Installation in San Antonio, TX

Now that you know more about spray foam vs. fiberglass, you may have a better idea of which type you want to install in your home. Regardless of your choice, count on IBP San Antonio to complete the installation for you. Contact us today!

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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