Tyvek® ThermaWrap® LE

Building Solutions | Tyvek® ThermaWrap® LE
Commercial | Residential | Multifamily | Wall

Engineered to increase R-value in wall systems

Effective in any season, Tyvek® ThermaWrap® LE protects against heat loss in the cold weather and keeps heat out in when the temperature rises. A low-emission surface helps to raise R-values for wall assemblies.


DuPont™ Tyvek® ThermaWrap® LE

DuPont™ Tyvek® ThermaWrap® LE is made with a metallized, low-emission (low-e) surface that reflects solar radiation away from the building. In cold weather, this helps prevent radiant heat loss from within the structure. In warmer weather, Tyvek® ThermaWrap® LE turns the tables, reflecting warm air out and away from the structure, to help improve air-conditioning efficiency. In all seasons, that can help make both residential homes and commercial buildings more comfortable, more energy efficient, and less costly to operate.


Features & benefits

Feature Benefit
Helps block air infiltration and exfiltration
  • Low-e surface changes the dynamics of radiant heat flow
  • Improves energy efficiency
  • Enhaces cost-effectiveness of heating and cooling systems

    Physical properties

    Method Unit Value
    Effective R-value (including 3/4" air space) ASTM C1371 - R-2
    Air Penetration Resistance ASTM E2178 cfm/ft2 @ 1.57 psf .002
    Gurley Hill (TAPPI T-460) sec/ 100cc 900
    Water Vapor Transmission ASTM E96-00 g/m2-24 hrs 475
    Method B perms 68
    Water Penetration Resistance AATCC 127 cm 210
    Basis Weight TAPPI T-410 oz/yd2 2.5
    Breaking Strength ASTM D882 lbs/in 29/27
    Tear Resistance (Trapezoid) ASTM D1117 lbs 12/7
    Surface Burning Characteristics ASTM E84 - 10
    Flame Spread Index - Class A
    Smoke - 40
    Developed Index - Class A
    Ultra Violet Light Exposure (UV) - - 120 days (4 months)