When it comes to keeping your home comfortable and energy-efficient, insulation is a must. But not all insulation materials are created equal. From fiberglass batts to spray foam and blown-in cellulose, each material has its own performance characteristics, benefits, and ideal applications. At Koala Insulation of Northern Illinois, we help homeowners choose the right insulation for their specific needs, climate, and budget.

Why Insulation Type Matters

Many people assume insulation is simply about adding a layer of material to keep heat in during the winter and out during the summer. While that’s true in principle, the material’s performance—measured by its R-value, moisture resistance, air sealing capability, and longevity—can vary widely. In Northern Illinois, where we experience frigid winters and warm, humid summers, the right insulation choice can make a big difference in year-round comfort and energy savings.

Understanding R-Value

The R-value is a measure of thermal resistance—the higher the R-value, the better the insulation’s ability to resist heat flow. Different materials have different R-values per inch:

• Fiberglass batts: Around R-2.9 to R-3.8 per inch
• Blown-in cellulose: Around R-3.2 to R-3.8 per inch
• Closed-cell spray foam: Around R-6 to R-7 per inch
• Open-cell spray foam: Around R-3.5 to R-3.6 per inch
  At Koala Insulation of Northern Illinois, we assess your home’s needs and recommend the insulation type and thickness needed to meet your efficiency goals.

Fiberglass Insulation

Fiberglass insulation is one of the most common types used in homes. It comes in pre-cut batts or can be blown in, and it’s known for being cost-effective and easy to install. It resists heat flow effectively but doesn’t seal air leaks on its own. Fiberglass is a good option for walls, floors, and attics when paired with proper air sealing. However, it can lose effectiveness if compressed or exposed to moisture.

Cellulose Insulation

Blown-in cellulose is made from recycled paper products treated for fire and pest resistance. It’s an eco-friendly option that provides good thermal performance and better air sealing compared to fiberglass batts. Cellulose is often used in attics and wall cavities, and it can be a great choice for improving insulation in older homes. At Koala Insulation of Northern Illinois, we often recommend cellulose for homeowners looking for a balance of performance and sustainability.

Spray Foam Insulation

Spray foam insulation is one of the most effective materials available. It expands upon application, filling cracks, gaps, and hard-to-reach areas for excellent air sealing and moisture resistance. There are two main types:

• Closed-cell spray foam: Denser, higher R-value, moisture barrier, and structural reinforcement.
• Open-cell spray foam: Lighter, lower R-value, but great for soundproofing and filling large cavities.
  Spray foam is ideal for attics, crawl spaces, rim joists, and areas where air leakage is a concern. While it’s a higher upfront investment, it often pays for itself through energy savings and improved comfort.

Mineral Wool Insulation

Mineral wool, also known as rock wool, is made from molten rock or slag spun into fibers. It has a high R-value per inch, excellent fire resistance, and natural water resistance. It’s often used where fire safety is a priority, such as around chimneys or in multi-family buildings. Koala Insulation of Northern Illinois installs mineral wool in specialized applications where durability and fire protection are top concerns.

Factors Beyond R-Value

While R-value is important, it’s not the only factor that determines insulation performance:

• Air Sealing: Spray foam provides the best air sealing, followed by dense-packed cellulose. Fiberglass batts require additional air barriers.
• Moisture Resistance: Closed-cell spray foam and mineral wool resist moisture best, helping prevent mold and mildew.
• Sound Control: Open-cell spray foam, cellulose, and mineral wool excel at reducing noise between rooms or from outside.
• Longevity: Spray foam and mineral wool can last decades without significant performance loss. Fiberglass and cellulose may settle or shift over time, requiring maintenance.

Climate Considerations in Northern Illinois

In our region, insulation must perform well in both cold winters and hot, humid summers. That means a combination of high R-value, good air sealing, and moisture control is crucial. Attic insulation is especially important, as heat loss through the roof can account for a large portion of your energy costs. Koala Insulation of Northern Illinois tailors recommendations based on your home’s age, design, and specific problem areas.

Choosing the Right Insulation for Your Home

There’s no one-size-fits-all answer when it comes to insulation. For example:

• If you have an older home with drafty walls, blown-in cellulose might be the best upgrade.
• If you’re finishing a basement or crawl space, closed-cell spray foam can provide both insulation and moisture protection.
• For a budget-friendly attic upgrade, blown-in fiberglass can be a great choice when combined with air sealing.
  Koala Insulation of Northern Illinois helps homeowners weigh the pros and cons of each material so they can make informed decisions.

The Koala Insulation Installation Process

When you work with us, we follow a thorough process to ensure you get the best results:

1. Home Assessment – We evaluate your current insulation and identify gaps or problem areas.
2. Material Recommendations – We suggest the right insulation types based on performance, budget, and your home’s needs.
3. Professional Installation – Our trained technicians use industry best practices to ensure proper depth, coverage, and sealing.
4. Post-Installation Check – We verify the quality of the installation and answer any questions you have.

Long-Term Benefits of the Right Insulation

Choosing the right insulation material and having it installed correctly offers many long-term benefits:

• Lower heating and cooling costs
• More consistent indoor temperatures
• Reduced strain on your HVAC system
• Improved indoor air quality
• Increased home value
• A more comfortable living environment year-round

Conclusion

Not all insulation materials perform the same, and choosing the right type for your home is key to getting the best energy savings and comfort. From fiberglass to spray foam, each option has its strengths and ideal uses. At Koala Insulation of Northern Illinois, we take the time to understand your home’s unique needs and recommend the insulation solution that will deliver the greatest results. Call us today at (847) 563-7811 or visit our website for a free estimate.