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Radiant Barrier USA
Residential Commercial Attic Floor Metal Building

P2 Single Bubble Double Foil

A slim double-foil reflective insulation for jobs where Double P2 is too thick. Both sides reflect 95% of radiant heat back toward the source, and the solid construction also blocks vapor. A good fit for floors, walls, and retrofits with limited cavity space.

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Features & Benefits

What makes it work

  • 5-layer bubble insulation structure for reliable performance
  • Solid poly white design provides a clean, aesthetic finish
  • Low-emittance foil surface (E=5%)
  • Reflects up to 95% of radiant heat
  • Unique LDPE plastic blend for enhanced strength and longevity
  • Stiffer than most bubble insulation products, making installation easier
  • Suitable for all building insulation applications
  • Ideal for retrofits and home improvement projects
  • Excellent insulation for metal buildings and carports
  • Reduces heat bridging in metal structures
  • Will not delaminate, ensuring long-term durability and stability
  • Compatible with hybrid installations using foam or fiberglass
  • Ideal for metal buildings where a white facing is desired
  • Provides impressive R-values when installed with airspace

Where it's used

Installation locations

Residential Buildings

Residential Buildings — tap hotspots to explore installation locations
Floor Insulation

Ordering

Available variants

Name SKU Width Length Coverage Weight Mil
500 ft² SB-4mmWB-Met 48" 125' 500 sq ft 33 lbs —

Technical Data

Specifications

SpecificationValue
Standard Roll Size48"x125'
Effective Coverage500 ft²
Thickness (inches) +/-5%0.16" nominal
Standard Roll Weight (lbs) +/-5%33 lb
Emittance (Metalized Foil Side)E=5% (95% Reflective)
Water Vapor Transmission ASTM E-960.02 perms
Mold and MildewNo Growth
Flame Spread, Smoke Development, and Fire RatingClass A / Class 1

Performance Data

Thermal performance

AssemblyHeat-Flow DirectionTypical R-Value
Crawl SpaceR-9.3*
Metal BuildingsHeat flow downR-9.2 to R-22*
Metal BuildingsWallR-4.4 to R-8.5*
Post Frame BuildingsHeat flow downR-9.2 to R-22*
Post Frame BuildingsWallR-4.4 to R-8.5*
Radiant FloorsHeat flow downR-9.2 to R-22*
Wall - Basement MasonryWallR-4.4 to R-8.5*
  1. R-values represent estimated and potential heat resistance for our insulation in the proposed application.
  2. Actual performance depends on air film size, temperature, surface condition, and airflow direction (up, down, or horizontal).
  3. Calculations are based on RIMA, AIRAH, ASHRAE, and ISO 6946 standards, following ASTM procedures for air film resistance.
  4. When two air spaces are used, values assume still air conditions in both spaces.
  5. For a full R-value assessment, please contact us directly or your nearest dealer.

How it stacks up

Compare with similar products

SpecificationP2 Single Bubble Double Foil (this product)
This product
Radiant Barrier RB+
Polyfoam PX50
Polyfoam PX30
R-Value

Thermal resistance. Higher is better.

R-4.4 to R-22
R-4.1 to R-14.5
R-7.43 to R-25.15
R-7 to R-24.5
Applications
  • Attic
  • Floor
  • Metal Building
  • Barndominium
  • Wooden Structure
  • Attic
  • Floor
  • Wall
  • Metal Building
  • Barndominium
  • Wooden Structure
  • Carport
  • Metal Building
  • Barndominium
  • Wooden Structure
  • Carport
Use Case
ResidentialCommercial
Residential
CommercialResidential
ResidentialCommercial
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