Insulation plays a critical role in maintaining a comfortable and energy-efficient home, especially in Michigan, where winters are harsh, and summers can be humid. Homeowners often choose between spray foam and fiberglass insulation, each offering distinct advantages depending on factors like budget, home structure, and energy efficiency goals.
This guide breaks down the key differences between these two insulation types, helping Michigan homeowners make informed decisions.
Insulation slows heat transfer, keeping homes warm in winter and cool in summer. The effectiveness of insulation is measured by R-value—the higher the R-value, the better the material resists heat flow.
Both spray foam and fiberglass have different R-values and installation methods, which impact their overall performance in Michigan’s varied climate conditions.
| Insulation Type | R-Value per Inch | Energy Efficiency Rating |
|---|---|---|
| Spray Foam (Closed-cell) | 6.0 – 7.0 | High |
| Spray Foam (Open-cell) | 3.5 – 4.0 | Moderate |
| Fiberglass Batts | 2.9 – 3.8 | Moderate |
| Fiberglass Blown-in | 2.2 – 4.3 | Moderate |
Spray foam provides a higher R-value per inch, making it more effective at sealing air leaks. Fiberglass, though lower in R-value, is still widely used due to affordability and ease of installation.
Spray Foam
Fiberglass
| Factor | Spray Foam | Fiberglass |
|---|---|---|
| Material Cost | Higher | Lower |
| Installation Cost | Higher (requires pros) | Lower (DIY possible) |
| Long-Term Savings | Higher (energy savings) | Moderate |
While spray foam has a higher upfront cost, it can lead to long-term energy savings due to its superior air-sealing properties. Fiberglass is budget-friendly and remains a popular choice for quick insulation upgrades.
For homes with moisture concerns, spray foam is often the better choice. However, properly installed fiberglass insulation with an effective vapor barrier can still perform well in Michigan’s climate.
| Feature | Spray Foam | Fiberglass |
|---|---|---|
| Lifespan | 30+ years | 10-25 years |
| Maintenance | Minimal | May need replacement or adjustment |
| Resistance to Pests | High | Moderate (can attract rodents) |
Spray foam has a longer lifespan and requires little maintenance. Fiberglass, while durable, may need periodic replacement or adjustments if it settles or is disturbed.
Best for Long-Term Efficiency & Air Sealing: Spray foam
Best for Budget-Conscious Homeowners: Fiberglass
Best for DIY Installation: Fiberglass
Best for High Moisture Areas: Spray foam (closed-cell)
If you’re considering insulation upgrades, consulting a professional can help determine the best solution based on your home’s structure and needs.
Insulation Services of Michigan, Inc. provides expert guidance and installation tailored to Michigan’s unique climate. If you’re unsure which insulation suits your home best, our team can assess your space and recommend a solution that balances cost, efficiency, and durability.
📞 Call us at (810) 267-4121 or email kam@ismichigan.com for a consultation.
Spray foam costs between $1.50 to $3.50 per square foot, depending on the type and thickness required.
Yes, fiberglass batts or blown-in insulation is commonly used in attics. However, proper air sealing is crucial to maximize efficiency.
Yes, open-cell spray foam provides good sound absorption, reducing noise between walls and floors.
Closed-cell spray foam is ideal for basements due to its moisture resistance and ability to prevent mold growth.
Yes, fiberglass batts can be a DIY project. However, professional installation ensures proper air sealing and coverage.
Yes, energy-efficient insulation can increase home value by reducing utility costs and improving comfort.
Once cured, spray foam is safe. Proper ventilation during installation is necessary to avoid exposure to fumes.
Fiberglass may need replacement every 10-25 years, while spray foam can last over 30 years with minimal maintenance.
Yes, proper insulation and air sealing reduce heat loss, preventing ice dams from forming on the roof.
Spray foam made with renewable materials and fiberglass containing recycled glass are both environmentally conscious choices.