SkyFlex Effective Air and Vapor Barrier

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Product Shot of SkyFlex

● Premium Flexible Sheet Air Barrier
● Low-e Surfaces Reduce Radiant Heat Transfer
● Inner Woven Layer for Superior Strength & Durability
● Tough, Puncture-Resistant Material won't Tear
● Provides R value with Enclosed Air Spaces
● Applications include: Bonus Room Knee Walls, Behind Tubs & Showers, Fireplace & Duct Chases, Elevator Shafts, Stair Wells, Between Multi-Family Units, Between Garage & Living Spaces
● 48" or 51" widths
● 500 sf Rolls
● Easy to Handle
● Installs 2x Faster than Rigid Air Barriers
● 1 Roll = 16 Sheets of 4 ft x 8 ft Board Product
● Wider Rolls Reduce Seams
● Meets ASTM C 2178 Air Permeability
● Class A Flammability Rating
● Meets International Building Codes (IBC)
● Meets International Residential Codes (IRC)
● Meets International Energy Conservation Codes (IECC)
● Meets Florida Building Codes (FBC)
● Meets Florida Residential Codes (FRC)
● Meets Florida Energy Conservation Codes (FECC)
● Supports Sustainability Goals
● National Network of Insulation Distributors
● National Network of Insulation Contractors
● Third-Party Verified Code Compliance, IAPMO UEL 5003
● Improves Thermal Performance of Building Envelope
● Significantly Improves Comfort in Living Areas with Exposed Walls
● Reflects Heat Away to Keep Home Cooler in the Summer
● Reduces Heat Loss to Keep Home Warmer in the Winter
● 1 Roll = 16 Sheets of 4 ft x 8 ft Board Product
● 1 Pallet covers as much as 2 pallets of Rigid Board
● Fewer Seams Reduces the Chance for Air Gaps
● Overlap Does Not Create the Thickness Problems of Rigid Board Barriers
● Easier for Installers to Carry
● Easier to Fit and Install in Small Spaces vs- Rigid Board
● Installs with a Staple Hammer
● Installs 2x Faster than Rigid Air Barriers
● Save Labor
● Save Warehouse Space
● Save on Material & Shipping
● Secure Fiberglass Batts for Better Performance Over Time
● Increase R value and Energy Efficiency When Used with Other Insulation such as Batt, Gypsum or Spray Foam
● Adds R1.7 with one (1) Side Exposed to Attic
● Adds R2.9 with 3/4" Enclosed Air Space
● National Network of Insulation Distributors
● National Network of Insulation Contractors
● Third-Party Verified Code Compliance, IAPMO UEL 5003

● Premium Flexible Sheet Air Barrier
● Low-e Surfaces Reduce Radiant Heat Transfer
● Inner Woven Layer for Superior Strength & Durability
● Tough, Puncture-Resistant Material won't Tear
● Provides R value with Enclosed Air Spaces
● Applications include: Bonus Room Knee Walls, Behind Tubs & Showers, Fireplace & Duct Chases, Elevator Shafts, Stair Wells, Between Multi-Family Units, Between Garage & Living Spaces
● 48" or 51" widths
● 500 sf Rolls
● Easy to Handle
● Installs 2x Faster than Rigid Air Barriers
● 1 Roll = 16 Sheets of 4 ft x 8 ft Board Product
● Wider Rolls Reduce Seams
● Meets ASTM C 2178 Air Permeability
● Class A Flammability Rating
● Meets International Building Codes (IBC)
● Meets International Residential Codes (IRC)
● Meets International Energy Conservation Codes (IECC)
● Meets Florida Building Codes (FBC)
● Meets Florida Residential Codes (FRC)
● Meets Florida Energy Conservation Codes (FECC)
● Supports Sustainability Goals
● National Network of Insulation Distributors
● National Network of Insulation Contractors
● Third-Party Verified Code Compliance, IAPMO UEL 5003
● Improves Thermal Performance of Building Envelope
● Significantly Improves Comfort in Living Areas with Exposed Walls
● Reflects Heat Away to Keep Home Cooler in the Summer
● Reduces Heat Loss to Keep Home Warmer in the Winter
● 1 Roll = 16 Sheets of 4 ft x 8 ft Board Product
● 1 Pallet covers as much as 2 pallets of Rigid Board
● Fewer Seams Reduces the Chance for Air Gaps
● Overlap Does Not Create the Thickness Problems of Rigid Board Barriers
● Easier for Installers to Carry
● Easier to Fit and Install in Small Spaces vs- Rigid Board
● Installs with a Staple Hammer
● Installs 2x Faster than Rigid Air Barriers
● Save Labor
● Save Warehouse Space
● Save on Material & Shipping
● Secure Fiberglass Batts for Better Performance Over Time
● Increase R value and Energy Efficiency When Used with Other Insulation such as Batt, Gypsum or Spray Foam
● Adds R1.7 with one (1) Side Exposed to Attic
● Adds R2.9 with 3/4" Enclosed Air Space
● National Network of Insulation Distributors
● National Network of Insulation Contractors
● Third-Party Verified Code Compliance, IAPMO UEL 5003

Product Visualizer

SkyFlex is a tough, flexible air barrier for use in residential and commercial building applications. The product consists of two layers of aluminum deposited to a layer of woven polyethylene. When exposed to air films or enclosed air spaces in building cavities, SkyFlex’s low-emittance exterior layers reduce radiant heat transfer.

Fast Facts


• Available for residential and commercial applications
• Flexible for fast and easy installation
• Adds R-Value to building envelope Economy and high-performance options
• Available in 500 square foot rolls in 48" or 51" widths

SkyFlex Product Image


  • Single Family
  • Multi Family
  • Restaurants
  • Light Commercial
  • Schools
  • Community
  • Manufacturing
  • Storage
  • Military
Width of Roll Solid - 48" / 51"
VT - 48"
Diameter Solid - 5"
VT - 5"
Lineal Footage Solid - 125' / 118'
VT - 125'
Coverage (Sqft) Solid - 500
VT - 500
Weight (lbs) Solid - 10
VT - 10

Test Method Description Results
ASTM E2178 Air Permeability Solid - <0.02 L/(s•m²)@75 Pa
VT - <0.004 L/(s•m²)@75 Pa
ASTM E96 Water Vapor Permeance Solid - <0.1
VT - >10
ASTM C1371 Emissivity Solid - 0.05
VT - 0.20
ASTM E84 Flame Spread Solid - <25
VT - <25
ASTM E84 Smoke Developed Solid - <50
VT - <50
Wall Exposed to Attic Solid - R-1.7
VT - R-1.4
0.75" Enclosed Air Space Solid - R-2.9
VT - R-2.0
1.50" Enclosed Air Space Solid - R-2.6
VT - R-1.8
Aluminum Foil 0.03 - 0.05
Other Low-e Material 0.11 - 0.25
Other Common Building Materials
including wood, masonry and
standard mass insulation
0.82 - 0.90



  • Single Family
  • Multi Family
  • Restaurants
  • Light Commercial
  • Schools
  • Community
  • Manufacturing
  • Storage
  • Military

Width of Roll Solid - 48" / 51"
VT - 48"
Diameter Solid - 5"
VT - 5"
Lineal Footage Solid - 125' / 118'
VT - 125'
Coverage (Sqft) Solid - 500
VT - 500
Weight (lbs) Solid - 10
VT - 10

Test Method Description Results
ASTM E2178 Air Permeability Solid - <0.02 L/(s•m²)@75 Pa
VT - <0.004 L/(s•m²)@75 Pa
ASTM E96 Water Vapor Permeance Solid - <0.1
VT - >10
ASTM C1371 Emissivity Solid - 0.05
VT - 0.20
ASTM E84 Flame Spread Solid - <25
VT - <25
ASTM E84 Smoke Developed Solid - <50
VT - <50
Wall Exposed to Attic Solid - R-1.7
VT - R-1.4
0.75" Enclosed Air Space Solid - R-2.9
VT - R-2.0
1.50" Enclosed Air Space Solid - R-2.6
VT - R-1.8
Aluminum Foil 0.03 - 0.05
Other Low-e Material 0.11 - 0.25
Other Common Building Materials
including wood, masonry and
standard mass insulation
0.82 - 0.90

Improve Your Building Envelope With SkyFlex

Get information about air barrier products and applications.







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