Batt / Roll
Sheep's Wool Insulation
Complete guide to sheep's wool insulation: R-value, installed cost, pros, cons, and best applications.
Key Specifications
3.5–3.8
R-Value per Inch
$1.00–$2.00
Material Cost/sqft
$1.80–$3.00
Installed Cost/sqft
17"
Depth for R-60
Cost Analysis (1,200 sq ft Attic)
| Option | Low Estimate | High Estimate |
|---|---|---|
| Material only (DIY) | $1,200 | $2,400 |
| Professionally installed | $2,160 | $3,600 |
*Estimates for a full install to Climate Zone 5 R-60 depth. Use the calculator for your specific situation.
+ Pros
- ✓Naturally renewable and biodegradable
- ✓Absorbs and releases moisture without losing R-value
- ✓Fire resistant — self-extinguishing
- ✓No protective equipment needed for installation
− Cons
- ✗Most expensive batt insulation available
- ✗Limited availability — often must be special ordered
- ✗Potential for moth damage if untreated
- ✗Very niche product with limited contractor familiarity
Best Applications
- →Ultra-green or passive house projects
- →Homeowners seeking fully natural materials
- →High-humidity environments where moisture buffering helps
Comparing Insulation Types
Sheep's Wool is a batt / roll insulation. With R-3.5–3.8 per inch, it delivers solid performance for most climate zones.
View full insulation type comparison →Explore Other Insulation Types
Is Sheep's Wool Right for Your Attic?
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