Foam vs. Fiberglass

There are pros and cons to both fiberglass and spray foam insulation - discover them here.

At Lucas Insulation, we’re proud to offer the highest-quality insulation for your home, as well as the proper techniques that maximize their effectiveness and the knowledge to help you pick the right product to meet your insulation needs. For non-insulation experts, however, the differences between fiberglass and spray foam can be hard to parse out.

That’s why we’ve assembled this chart, to show you the various pros and cons of each type of insulation we offer:


Spray Foam

Made up of billions of tiny glass fibers

Made up of a polymer (like polyurethane) and a foaming agent

Uses air bubbles to slow the transfer of heat

Acts as a barrier to stop airflow

Air leakage common (which can account for as much as 40% of AC costs)

No air leakage (when installed properly by experts)

Lower R-factor, so you need much thicker insulation

Higher R-factor, so less insulation required

Has the potential for mold growth and pest infestation

Kills mold and prevents future growth

Can sag and settle over time, requiring multiple installations

Will not sag or settle

Easy to update, re-install, or replace

Much more difficult to update, re-install, or replace

Less energy efficient

More energy efficient


Cheaper per square foot

2-3x more expensive per square foot

Higher utility costs long term

Bigger savings on heating and cooling costs

While this chart is a good start to determining which insulation type would be best for you, there’s no right answer when it comes to insulation. The best option for insulating your home depends on so many factors – the layout of the house, its sealing, your budget – that there can be no one-size-fits all solution.

That’s why we recommend that you take advantage of our free in-home analysis, so you can find out what kind of insulation would work best for your home. Call or contact us today to speak with one of our insulation experts and schedule your free analysis at 803-951-2378.

Very courteous, dependable crew explained everything very clearly, cleaned up after themselves, did a great job very satisfied a job well done. We can already feel the difference in the temperature in our addition and we haven't even installed our central air unit.

Angela A., Batesburg, SC