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 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.
|Helps block air infiltration and exfiltration||
|Improves energy efficiency||
|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|
|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|
|Developed Index||-||Class A|
|Ultra Violet Light Exposure (UV)||-||-||120 days (4 months)|