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Types Of Attic Insulation

Pros & Cons

At American Attic Services, based in Houston, Texas, we specialize in helping homeowners find the best attic insulation solutions to improve energy efficiency, indoor comfort, and HVAC system performance. But with so many insulation options out there, choosing the right type can be overwhelming.

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This guide will walk you through the 5 most common types of attic insulation, breaking down their pros and cons and helping you decide what type of insulation for attic spaces works best for your home.

Fiberglass Batt Insulation

Fiberglass Batt Insulation

Fiberglass batt insulation is made from fine glass fibers and is sold in pre-cut panels or rolls. It’s one of the most popular and budget-friendly types of attic insulation.

Pros:

  • Easy to install between joists and studs

  • Affordable and widely available

  • Fire-resistant and moisture-resistant

  • Great for attics with standard framing and open spaces

 

Cons:

  • Gaps and compression during installation can reduce effectiveness

  • Not ideal for oddly shaped or hard-to-reach areas

  • May irritate skin or lungs without protective gear

 

Best For: Homeowners looking for budget-friendly insulation types for attic spaces with easy access and standard framing.

Blown-In Fiberglass Insulation

Blown-In Fiberglass Insulation

This insulation uses loose fiberglass particles blown into attic spaces using a special machine, offering better coverage and air sealing than batt insulation.

Pros:

  • Fills gaps and corners more effectively than batts

  • Provides good thermal resistance (R-value)

  • Pest- and fire-resistant

  • Faster to install by professionals

 

Cons:

  • Requires specialized equipment

  • Can settle over time, reducing insulation value

  • May need a vapor barrier depending on attic conditions

 

Best For: Irregularly shaped attics or those with existing insulation that needs to be topped off or supplemented.

Cellulose Insulation

Cellulose Insulation

Made from recycled paper treated with fire retardants, cellulose is a dense, eco-friendly attic insulation type that’s also blown-in.

Pros:

  • High R-value per inch

  • Environmentally friendly and made from 80%+ recycled materials

  • Excellent air sealing, helping reduce drafts

  • Resists pests and mold when properly treated

 

Cons:

  • Can absorb moisture if attic ventilation is poor

  • May settle over time, reducing effectiveness

  • Professional installation recommended

 

Best For: Houston homeowners interested in green, efficient insulation that provides excellent thermal performance.

Spray Foam Insulation

Spray Foam Insulation

Spray foam insulation expands upon application to seal cracks, crevices, and gaps. It comes in two forms: open-cell and closed-cell foam.

Pros:

  • Highest R-value per inch of all insulation types

  • Creates a powerful air and moisture barrier

  • Ideal for sealing leaks and hard-to-reach areas

  • Can improve structural strength (especially closed-cell)

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Cons:

  • Most expensive insulation type

  • Requires professional installation

  • Not always necessary in vented attics

 

Best For: Homeowners who want the best insulation for attics with air sealing, moisture control, and long-term energy savings.

Radiant Barrier Insulation

Radiant Barrier Insulation

Radiant barriers are reflective insulation materials (usually aluminum foil) that reflect radiant heat away from your attic.

Pros:

  • Reduces heat gain, especially in hot climates like Houston

  • Helps lower cooling costs in summer

  • Works well when combined with other insulation types

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Cons:

  • Doesn't reduce conductive or convective heat loss

  • Less effective in cold climates

  • Requires correct installation to perform effectively

 

Best For: Homes in hot areas like Houston, Texas, where keeping the attic cool during summer is a priority.

So, What Is the Best Insulation for an Attic in Houston?

The answer depends on your attic's layout, budget, energy needs, and whether you're installing new insulation or upgrading old material. At American Attic Services, we assess your space and recommend the best attic insulation method tailored to your home.

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Contact us today to schedule a free inspection and find out what kind of insulation for attic spaces will give you the most comfort and savings!

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