Side-by-side specs
| Spec | Radiant Barrier | Attic Insulation |
|---|---|---|
| Mechanism | Reflects radiant heat | Slows conductive heat |
| Best climate | Hot sunny (zones 1–3) | All climates |
| Energy savings | 5–10% AC in hot climates | 10–30% heating + cooling |
| Typical cost | $0.10–$0.95 / sq ft | $1.00–$2.75 / sq ft |
Radiant Barrier
Pros
- Reduces attic temperature 10–30°F in summer
- Cuts AC load in hot climates
- Cheap material cost
- Helps protect ducts in unconditioned attics
Cons
- Almost no benefit in cold climates
- Dust on the foil destroys its reflectivity over time
- Doesn't replace insulation
Attic Insulation
Pros
- Saves energy year-round in every climate
- Largest single energy upgrade for most homes
- Qualifies for federal & utility rebates
- Lasts decades
Cons
- Higher upfront cost
- Needs proper air sealing first to perform
Which should you pick?
- You live in TX, FL, AZ, GA, or similar: Go with either. Both help — but bring attic insulation to R-49 FIRST, then add a radiant barrier.
- You live in OH, PA, NY, NE, or colder: Go with Attic Insulation. Radiant barrier offers almost nothing in winter-dominated climates.
- Your attic insulation is already R-49+: Go with Radiant Barrier. Radiant barrier is the next-best upgrade in hot climates.
Frequently asked questions
Related comparisons
- Spray Foam vs. Blown-In Insulation
- Open-Cell vs. Closed-Cell Spray Foam
- Fiberglass vs. Cellulose Insulation
- Batt vs. Blown-In Insulation
- See all insulation comparisons
Get attic insulation quotes in a top city
Local pricing and licensed contractors for Attic Insulation in these metros.
Attic Insulation in Rochester, NYAttic Insulation in Buffalo, NYAttic Insulation in Raleigh, NCAttic Insulation in Philadelphia, PAAttic Insulation in Orlando, FLAttic Insulation in Minneapolis, MNAttic Insulation in Oklahoma City, OKAttic Insulation in Madison, WI
Next steps
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