Batt / Roll
Fiberglass Batts (Kraft-Faced) Insulation
Complete guide to fiberglass batts (kraft-faced) insulation: R-value, installed cost, pros, cons, and best applications.
Key Specifications
2.9–3.8
R-Value per Inch
$0.35–$0.55
Material Cost/sqft
$0.85–$1.25
Installed Cost/sqft
18"
Depth for R-60
Cost Analysis (1,200 sq ft Attic)
| Option | Low Estimate | High Estimate |
|---|---|---|
| Material only (DIY) | $420 | $660 |
| Professionally installed | $1,020 | $1,500 |
*Estimates for a full install to Climate Zone 5 R-60 depth. Use the calculator for your specific situation.
+ Pros
- ✓Kraft facing acts as a vapor retarder
- ✓Pre-sized for standard 16" and 24" joist spacing
- ✓Good choice for Climate Zones 5–7 on ceilings
- ✓Low cost, widely available
− Cons
- ✗Kraft facing is flammable — must be covered
- ✗Facing direction matters and is often installed wrong
- ✗Same air-leakage issues as unfaced batts
Best Applications
- →Cold-climate attic floors where vapor control is needed
- →New construction with clear joist bays
- →Homeowners replacing old degraded batts
Comparing Insulation Types
Fiberglass Batts (Kraft-Faced) is a batt / roll insulation. With R-2.9–3.8 per inch, it is suited to applications where depth is not a constraint.
View full insulation type comparison →Explore Other Insulation Types
Is Fiberglass Batts (Kraft-Faced) Right for Your Attic?
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