As summer temperatures rise, your energy costs probably do too. If your air conditioner seems to run non-stop — yet your home still feels warm and sticky — the real problem might not be your HVAC system… It’s your insulation.
At Comfort 1st Insulation, we get this question all the time:
“Will spray foam insulation actually help keep my house cooler in summer?”
The answer is a resounding YES — and in most cases, far more effectively than traditional batt or blown-in insulation. Here’s why smart homeowners across Northern IL and Southern WI are choosing spray foam as the ultimate upgrade.
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While fiberglass batts and blown-in cellulose slow down heat transfer, they don’t stop it — and they definitely don’t stop air leaks.
Spray foam, on the other hand, seals every crack, gap, and crevice, locking out the sweltering summer heat and humidity before it even gets inside your home.
💡 Pro Tip: Up to 40% of your home’s energy loss comes from air leaks. Spray foam helps eliminate that.
Not all insulation is created equal. R-value measures resistance to heat flow — and spray foam dominates:
• Closed-cell spray foam: R-6 to R-7 per inch
• Fiberglass batts: R-3.5 per inch (if perfectly installed — and it rarely is)
• Blown-in cellulose: R-3.2 to R-3.8 per inch
• More R-value = More comfort = More savings.
Ever notice how some rooms are just… hotter than others in summer?
That’s usually due to gaps in insulation coverage and thermal bridging — heat sneaking in through walls, ceilings, and poorly insulated attic spaces.
Spray foam hugs every surface, creating a continuous thermal barrier. No drafts. No hot spots. Just consistent, comfortable indoor temperatures — even when it’s blazing outside.
Summer humidity is no joke. When warm air enters your attic or walls and meets cool surfaces, condensation forms — and that can lead to mold, mildew, and damage.
Closed-cell spray foam acts as a moisture barrier too, keeping humidity under control and helping protect your home’s structure long-term.
Spray foam is a premium insulation solution — and yes, the upfront cost is higher.
But here’s what our customers consistently tell us:
“Our AC barely runs now. It’s cool and quiet in here, even during heat waves.”
And over time, spray foam can actually pay for itself in energy savings, increased home value, and fewer HVAC repairs.
Summer humidity is no joke. When warm air enters your attic or walls and meets cool surfaces, condensation forms — and that can lead to mold, mildew, and damage.
Closed-cell spray foam acts as a moisture barrier too, keeping humidity under control and helping protect your home’s structure long-term.
Need insulation installation for your home or business in Northern Illinois or Southern Wisconsin? Comfort 1st Insulation offers professional, reliable service throughout the region.
Call us at (833) 244-7283 to schedule an attic inspection with one of our experts. Have questions? Fill out our contact form or email us at info@comfort1stinsulation.com—we’re here to help!
