When it comes to insulating your home in Fresno, spray foam insulation offers significantly greater long-term cost savings than fiberglass especially in our hot summers and chilly winter nights. While fiberglass may win in upfront cost, spray foam delivers superior energy efficiency, reducing your monthly utility bills and providing a tighter seal that lasts decades.
At Supreme Spray Foam Fresno, we’ve seen firsthand how spray foam transforms energy use in Fresno homes. In this article, we break down the true cost differences, efficiency ratings, pros and cons, and when fiberglass might still be worth considering.
Understanding Insulation: Spray Foam vs. Fiberglass
| Feature | Spray Foam Insulation | Fiberglass Insulation |
| Initial Cost | Higher | Lower |
| Energy Efficiency | Superior | Moderate |
| Air Sealing | Excellent (airtight) | Poor (requires vapor barrier) |
| R-Value per inch | 6.0–7.0 (closed-cell) | 2.9–3.8 |
| Lifespan | 20+ years | 10–25 years |
| Moisture Resistance | High | Low |
| Installation Complexity | Professional only | DIY-friendly |
Key Factors That Influence Long-Term Savings
Energy Efficiency in Fresno’s Climate
Fresno’s climate brings intense summer heat and chilly winter mornings. HVAC systems work hard and poorly insulated homes waste a lot of that energy.
Spray foam minimizes heat transfer and air leakage. By sealing every nook and cranny, it reduces HVAC strain and shrinks your monthly energy bills by up to 30–50%. Fiberglass, while somewhat effective, can’t match that performance, especially in older homes with structural gaps.
Bonus Tip: Ask your installer about closed-cell foam it offers even higher R-values and adds structural rigidity.
True Cost Over Time
Let’s compare typical long-term costs for a 2,000 sq ft home in Fresno:
| Cost Factor | Spray Foam | Fiberglass |
| Installation | ~$5,000–$9,000 | ~$2,000–$3,500 |
| Annual Savings | ~$800–$1,400 | ~$200–$500 |
| ROI Timeframe | 3–6 years | 7–10+ years |
| Replacement | Rare (20+ yrs) | Likely every 15–20 yrs |
Bonus Tip: Some local energy rebate programs can help offset spray foam’s upfront cost. See “Things to Know” below.
Technical Details: R-Values and Material Specs
| Insulation Type | R-Value per Inch | Best Use Areas |
| Closed-Cell Spray | R-6.5–7.0 | Attics, walls, crawlspaces |
| Open-Cell Spray | R-3.5–4.0 | Interior walls, soundproofing |
| Fiberglass Batts | R-2.9–3.8 | Walls, ceilings, floors |
| Blown-In Fiberglass | R-2.2–2.7 | Attics, unfinished areas |
R-value measures thermal resistance the higher, the better the insulation’s ability to prevent heat loss/gain.
Things to Know Before You Decide
Before you commit to spray foam or fiberglass, here are a few essential considerations:
- Ventilation: Spray foam creates a tighter envelope. You may need to upgrade your ventilation system to maintain air quality.
- Moisture Control: Spray foam is ideal for moisture-prone areas like basements and crawl spaces. Fiberglass is susceptible to mold if it gets wet.
- Rebates & Incentives: Fresno-area homeowners can check with PG&E or Energy Upgrade California for rebate programs that offset spray foam costs.
- Home Age & Design: Older homes often benefit more from spray foam due to structural gaps and outdated insulation.
Bonus Tip: Schedule a home energy audit before upgrading insulation it’ll pinpoint exactly where energy loss occurs.
Trending Discussions in Fresno: What Homeowners Are Asking
Lately, homeowners are asking:
- Is spray foam too airtight for Fresno homes?
With proper ventilation upgrades, it’s actually healthier and more efficient. - Will spray foam increase my home value?
Yes! Buyers increasingly recognize energy efficiency as a top priority. - Can I install fiberglass myself to save money?
You can but spray foam’s long-term savings often outweigh DIY fiberglass.
Ready to Achieve Maximum Energy Savings?
At Supreme Spray Foam Fresno, we specialize in high-performance insulation solutions that dramatically lower your utility bills and enhance home comfort. If you’re weighing fiberglass versus spray foam, we’re here to help you make a smart, cost-effective decision tailored to Fresno’s unique climate.
Apply these insights now: Schedule your insulation consultation with Supreme Spray Foam Fresno. We’ll walk you through your options and help you unlock long-term savings. (559) 545-0800 or [email protected]
Your Insulation Questions Answered by Supreme Spray Foam Fresno
Is spray foam insulation worth the higher upfront cost?
Yes, especially in Fresno’s climate. It pays for itself in energy savings within a few years.
Can spray foam be added to existing walls?
Yes, but it requires special equipment. It’s ideal during remodels or new construction.
Is fiberglass still a good choice for some homes?
It can be, particularly if you’re on a tight budget or planning to move soon.
What’s the lifespan difference between the two?
Spray foam lasts over 20 years with minimal degradation. Fiberglass tends to settle or deteriorate after 10–20 years.
Is spray foam environmentally friendly?
Modern spray foams have lower VOCs and better energy savings, reducing your carbon footprint over time.
Which insulation is better for soundproofing?
Open-cell spray foam is excellent for sound dampening. Fiberglass helps, but not as effectively.
What’s the installation time for spray foam vs. fiberglass?
Spray foam takes longer and requires drying time. Fiberglass can be installed quicker, often in a single day.
Can spray foam be used in mobile or modular homes?
Yes, spray foam is highly adaptable and can be used in all types of residential construction.
Does spray foam require maintenance?
Very little. Once installed, spray foam rarely needs attention, unlike fiberglass which may need repositioning or replacement.