R-Value Performance + Roll Size

• Material R-Value: ~R-8.5
• Installed R-Value:
  • R-10 with Crawl Space Ninja install method (¾" air gap)
  • Up to R-12 with 1" air gap
• Roll Size: 4’ x 25’ - 100 sqft per roll

If you install insulation flat against the wall, you’re leaving performance on the table.
The Crawl Space Ninja install method uses an air gap and that’s what allows this system to actually perform at a higher R-value.

Key Benefits

• R-8.5 material / R-10+ with Crawl Space Ninja install method
• Up to R-12 with increased air gap
• Class A Fire Rated
• 100 sq ft per roll (4’ x 25’)
• All-in-one insulation + vapor barrier system
• Designed specifically for crawl space environments

Learn More Here - Ninja DualBarrier™ Crawl Space Wall Insulation & Vapor Barrier Explain – Crawl Space Ninja Store

What Is the Ninja DualBarrier™?

The Crawl Space Ninja® Ninja DualBarrier™ is an insulated vapor barrier designed specifically for crawl space walls, built to handle moisture control and insulation in one system.

Instead of installing rigid foam board and then covering it with a separate vapor barrier, this does both jobs at once cleaner, faster, and more consistent.

It uses a composite insulation design that combines insulation and a sealed vapor surface to:

• Block ground and wall moisture
• Add real thermal resistance to stabilize crawl space temperatures
• Improve overall efficiency of your encapsulation system

When installed using the Crawl Space Ninja air gap method, the system performs even better by increasing its effective R-value something traditional flat-installed insulation can’t do.

It also features a Class A fire rating, meaning it meets high standards for flame spread and smoke development, making it suitable for exposed crawl space applications.

Why This Beats a Standard Vapor Barrier

The Ninja DualBarrier™:

• Insulates + blocks moisture in one step
• Improves energy efficiency
• Helps your dehumidifier maintain conditions
• Reduces condensation risk on walls