When it comes to insulating your home, choosing the right material can make a big difference in comfort, energy efficiency, and long-term performance. Two popular options for homeowners are spray foam insulation and blown-in insulation. Both offer unique benefits, but understanding their differences can help you decide which one is the best fit for your home.
What Is Spray Foam Insulation?
Spray foam insulation is applied as a liquid that quickly expands into a thick foam, sealing gaps and cracks as it hardens. It creates an airtight barrier that is highly effective at keeping heat in during winter and out during summer.
Benefits of Spray Foam:
- Excellent air seal – Reduces drafts, air leakage, and outside noise.
- High R-value – Offers one of the best thermal resistances per inch.
- Moisture barrier – Helps prevent mold and mildew.
- Durability – Doesn’t sag or settle over time.
What Is Blown-In Insulation?
Blown-in insulation—usually made of cellulose or fiberglass—is installed using a machine that blows loose particles into attics, wall cavities, or other open areas. It’s a great option for retrofitting older homes or topping off existing insulation.
Benefits of Blown-In Insulation:
- Affordable and efficient – Great value for large areas.
- Quick installation – Especially effective for attics and hard-to-reach spots.
- Eco-friendly options – Cellulose is often made from recycled paper.
- Good coverage – Fills irregular spaces better than batts or rolls.
Key Differences at a Glance
| Feature | Spray Foam | Blown-In Insulation |
|---|---|---|
| Air Sealing | Excellent | Moderate |
| R-Value per Inch | High | Medium |
| Moisture Resistance | Strong | Limited |
| Cost | Higher upfront | More budget-friendly |
| Longevity | 20+ years, resists settling | May settle and need topping off |
| Installation Areas | Walls, attics, crawlspaces | Attics, walls, hard-to-reach areas |
Which Insulation Should You Choose?
If you’re looking for maximum energy efficiency, air sealing, and long-term performance, spray foam insulation is often the best investment. However, if you need a cost-effective solution for an attic or older home, blown-in insulation can still deliver great results.
Trust the CSRA Insulation Experts
Still not sure which option is right for your home? Trust the experts at Smith Insulation Services. With more than 20 years of experience and a reputation for reliable, professional service, we can help you choose the best insulation solution to keep your home comfortable and efficient year-round. We take pride in doing high-quality work at affordable prices across the CSRA, including Augusta, Evans, Grovetown, Harlem, Appling, North Augusta and surrounding communities. Contact us today to schedule a free consultation!