º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® ThermaWrap® LE
Breathable, Low-Emissivity Water-Resistive and Air Barrier (WRB) for Enhanced Energy Efficiency
º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® ThermaWrap® LE
Breathable, Low-Emissivity Water-Resistive and Air Barrier (WRB) for Enhanced Energy Efficiency
<br><b>º£½Ç´óÉñâ„¢ ThermaWrap® LE</b> is a non-woven, non-perforated, spun-bonded polyethylene sheet air and water-resistive barrier made with a metallized, low-emission (low-e) surface that reflects solar radiation away from the building.
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In cold weather, this helps prevent radiant heat loss from within the structure. In warmer weather, <b>°Õ²â±¹±ð°ì® ThermaWrap® LE</b> 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.
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Like all °Õ²â±¹±ð°ì® air and water-resistive barriers (WRB's), <b>°Õ²â±¹±ð°ì® ThermaWrap® LE</b> helps prevent water accumulation inside the wall system by allowing moisture vapor to escape to the outside. In turn, this helps reduce the risk of mold and wood rot, which is important in all climates. With its combination of air and water holdout, vapor permeability, and a low-e surface, <b>°Õ²â±¹±ð°ì® ThermaWrap® LE</b> provides the best of both worlds for managing energy efficiency.
Features & Benefits
Specifications
Standard Sizes
| Unit | Width | Length |
|---|---|---|
| Roll | 9 ft. | 100 ft. |
Testing
<b>°Õ²â±¹±ð°ì® ThermaWrap® LEâ„¢</b> exhibits the properties and characteristics indicated in the table below when tested as represented. Review all instructions and (Material) Safety Data Sheet ((M)SDS) before use. Please contact your local º£½Ç´óÉñâ„¢ Tyvek Specialist before writing specifications around this product. Product properties are as follows:
| TEST METHOD | TEST TITLE | PROPERTY | RESULTS |
|---|---|---|---|
| AIR | |||
| ASTM E2178 | Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials | Air Penetration Resistance | .002 cfm/ft2@ 1.57 psf |
| TAPPI T460 | Air resistance of paper (Gurley method) | Air Penetration Resistance | 900 sec/100cc |
| FIRE | |||
| ASTM E84 | Standard Test Method for Surface Burning Characteristics of Building Materials | Surface Burning Characteristics Class A Index | Flame Spread = 10 Smoke Developed = 40 |
| STRENGTH | |||
| ASTM D882 | Standard Test Method for Tensile Properties of Thin Plastic Sheeting | Breaking Strength | 29/27 lbs/in |
| ASTM D1117 | Standard Guide for Evaluating Nonwoven Fabrics | Tear Resistance | 12/7 lbs |
| TAPPI T-410 | Grammage of Paper and Paperboard (º£½Ç´óÉñight per Unit Area) | Basis º£½Ç´óÉñight | 2.5 oz/yd2 |
| WATER | |||
| AATCC 127 | Test Method for Water Resistance: Hydrostatic Pressure | Water Penetration Resistance | 210 cm |
| ASTM E96 | Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials | Water Vapor Transmission Method B | 475 g/m268 perms |
Additional Learning
How to Install
Learn the essential steps for installing º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® as part of a high‑performance building envelope system. Our installation guides will show how proper installation helps maximize air and water protection for long‑lasting home durability.
Vapor Permeability
Vapor permeability plays a critical role in protecting walls from trapped moisture, mold and rot. Learn how º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® water-resistive barriers provide the ideal balance of air and water resistance with high breathability to help walls dry effectively.
Tyvek ® Specialist Network
The º£½Ç´óÉñ Building Envelope Specialist Network delivers hands‑on technical support, training and guidance to help teams build durable, energy‑efficient structures. Discover how º£½Ç´óÉñ pairs advanced product performance with unmatched field expertise to support your project every step of the way.
Tyvek ® Warranty
º£½Ç´óÉñ offers a full range of product and system warranties designed to protect builders and property owners with reliable, long‑term coverage. Explore how º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® warranties, along with expert project support, help ensure durable, high‑performing building envelope systems.
Energy Efficient Homes
Energy‑efficient construction starts with science‑driven water-resistive barriers that protect walls and improve long‑term performance. See how º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® and the full º£½Ç´óÉñ Building Envelope system work together to reduce energy loss, manage moisture and support sustainable building design.
Sustainable Building Products
Builders can earn National Green Building Standardâ„¢ (NGBS) certification points by using º£½Ç´óÉñâ„¢ °Õ²â±¹±ð°ì® and other º£½Ç´óÉñ sustainable building products approved by Home Innovation Research Labs. Learn how these high‑performance materials support greener construction while enhancing energy efficiency and moisture protection.
