Premium Tier
Limited Warranty
Johns Manville Insulation Warranty
Bottom line (2026): Johns Manville offers a 25-year limited warranty on its insulation — transferable to new owners, with labor covered for the first 2 year(s). Scores 80/100 on the HomeScore Warranty Index, rated excellent for the premium-tier insulation category.
25 yr
Base Warranty
50–100 yr
Expected Lifespan
$1,500–$8,000
Price Range
Climate Pro
Top Model
Warranty Score
What's Covered
- R-value performance
- Material integrity
- Fire resistance rating
- Moisture resistance
Common Exclusions
- Settling over time
- Pest damage
- Moisture from external sources
- Improper installation
- Removal/reinstallation costs
Warranty Details
| Coverage Type | Limited Warranty |
| Duration | 25 years |
| Transferable | Yes (fee: $50–$150) |
| Labor Coverage | Yes — first 2 year(s) |
| Registration Required | Yes — within 60 days from purchase |
| Extended Warranty | Not available |
| Country of Origin | USA |
Warranty Claim Tips
- Most insulation warranties are essentially material warranties — labor is almost never covered
- Spray foam warranties require installation by a certified applicator
- Keep your energy audit or blower door test results as baseline documentation
HomeScore Pro Tips
- Insulation rarely fails within warranty — the bigger risk is improper installation reducing R-value by 20–40%
- Rockwool is the only major insulation brand that doesn't degrade from moisture contact
Compare Insulation Warranties
Related Resources
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