Reflective / Radiant Barrier
Radiant Barrier Insulation
Complete guide to radiant barrier insulation: R-value, installed cost, pros, cons, and best applications.
Key Specifications
N/A
R-Value per Inch
$0.15–$0.50
Material Cost/sqft
$0.50–$1.00
Installed Cost/sqft
N/A
Depth for R-60
Cost Analysis (1,200 sq ft Attic)
| Option | Low Estimate | High Estimate |
|---|---|---|
| Material only (DIY) | $180 | $600 |
| Professionally installed | $600 | $1,200 |
*Estimates for a full install to Climate Zone 5 R-60 depth. Use the calculator for your specific situation.
+ Pros
- ✓Reduces summer cooling load by 5–10%
- ✓Very low material cost
- ✓Effective in hot sunny climates
- ✓Can be stapled directly to roof rafters in attic
− Cons
- ✗Provides no R-value — must be combined with insulation
- ✗Minimal benefit in cold climates
- ✗Effectiveness reduced once surface gets dusty
- ✗Only addresses radiant heat — not conductive or convective
Best Applications
- →Hot sunny climates (Climate Zones 1 and 2)
- →Homes with high cooling costs
- →Vented attics as a supplement to blown-in insulation
- →New construction in the South and Southwest
Comparing Insulation Types
Radiant Barrier is a reflective / radiant barrier insulation. It works by reflecting radiant heat rather than adding R-value, so it should always be combined with conventional insulation.
View full insulation type comparison →Explore Other Insulation Types
Is Radiant Barrier Right for Your Attic?
Use our free calculator to get a personalized recommendation based on your climate zone, attic size, and budget.
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