Updated: May 18, 2025
Choosing the right insulation for your attic is a key decision for any homeowner. The right material can slash your energy bills and keep your home comfortable year-round.
The best insulation for most attics is fiberglass, with an R-value between R-38 and R-60 depending on your local climate zone. Other excellent options include cellulose, spray foam, and mineral wool, each with their own strengths. Your attic insulation needs depend on several factors including your location, budget, and existing home setup. Colorado homes, for example, typically require higher R-values due to our cold winter temperatures. Proper installation matters just as much as the material you choose - even the best insulation performs poorly when gaps are left or moisture isn't properly managed.
Attic Insulation Types: Pros, Cons, And Best Applications
Choosing the right attic insulation dramatically affects your home's energy efficiency and comfort. Different materials offer varying benefits depending on your climate, budget, and existing home structure.
Side-By-Side Comparison Table
Fiberglass batts are pre-cut panels made from tiny glass fibers. They come in standard widths to fit between wall studs and attic joists.
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Affordable option ($0.40-$1.00 per square foot)
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DIY-friendly installation
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Non-flammable and doesn't decay over time
Available in different R-values for various climate needs
Can leave gaps if not installed properly
Loses efficiency when compressed or wet
May irritate skin and lungs during installation
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