Rigid Board
XPS Foam Board Insulation
Complete guide to xps foam board insulation: R-value, installed cost, pros, cons, and best applications.
Key Specifications
4.7–5
R-Value per Inch
$0.70–$1.30
Material Cost/sqft
$1.40–$2.30
Installed Cost/sqft
13"
Depth for R-60
Cost Analysis (1,200 sq ft Attic)
| Option | Low Estimate | High Estimate |
|---|---|---|
| Material only (DIY) | $840 | $1,560 |
| Professionally installed | $1,680 | $2,760 |
*Estimates for a full install to Climate Zone 5 R-60 depth. Use the calculator for your specific situation.
+ Pros
- ✓Higher R-value per inch than EPS (4.7–5.0)
- ✓Excellent moisture resistance
- ✓Consistent performance across temperature ranges
- ✓Strong compressive strength
− Cons
- ✗Higher global warming potential than EPS
- ✗R-value drifts slightly over decades as blowing agent escapes
- ✗More expensive than EPS
- ✗Must be covered with thermal barrier
Best Applications
- →Continuous insulation on roof deck (above-deck)
- →Situations requiring thin profile with high R-value
- →Below-grade applications with high moisture exposure
Comparing Insulation Types
XPS Foam Board is a rigid board insulation. With R-4.7–5 per inch, it delivers solid performance for most climate zones.
View full insulation type comparison →Explore Other Insulation Types
Is XPS Foam Board Right for Your Attic?
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