A comparison of Typar® Building Wrap and Tyvek® HomeWrap® for residential construction found several common features; both meet the minimum requirements for water- and air-resistance and are cold resistant. However, they fall short on several elements of a high-quality weather-resistant barrier for home construction.
Barricade® Wrap Plus is a superior option for meeting and exceeding all the parameters of a high-quality weather-resistant barrier for home construction. Barricade® Wrap Plus is water and air resistant, cold resistant, and includes drainage against bulk water (unlike Typar®). Barricade® Wrap Plus is also surfactant-resistant (unlike Tyvek®), optimally vapor permeable (unlike Tyvek®) and has a longer UV rating than either Typar® or Tyvek HomeWrap®.
House wraps are weather-resistant barriers (WRBs) that function to stop air and moisture infiltration to the wall system of homes while protecting the sheathing. To accomplish these functions, a WRB needs to provide the right balance of water and air resistance and vapor permeability. They must also have the strength to resist damage during and after construction.
There are several necessary performance criteria to consider when comparing house wraps for home construction. These parameters include water and air resistance, vapor permeability, drainage, and durability.
An essential requirement of a house or building wrap is to keep water out of the wall system. The ICC-ES allows for three different water-resistance testing standards; however, only the first two are acceptable for plastic wraps.
The air resistance of house wraps is a continuous system that prevents movement of air across the building envelope. Several tests measure air resistance.
Vapor permeability (perms) is the amount of vapor transmission that a house wrap allows over time. The ASTM E96: Test Method for Water Vapor Transmission of Materials determines perms. The greater the perm, the more vapor permeable the wrap. However, it can’t be so high that water can penetrate from the outside into the wall assembly.
According to Joseph Lstiburek, of the Building Science Corporation, the perfect WRB perm, for balancing the outward and inward movement of moisture in a wall assembly is between 10 and 20 perms.
Drainage is an effective way to reduce moisture infiltration to the wall system due to rain. A high-quality house wrap should be designed to provide an integrated gap and a drainage plane so to resist bulk water.
A durable house wrap can withstand the handling and installing process without becoming damaged, which will compromise its water-resistance performance. Durability parameters include tensile strength, ultraviolet (UV), cold, and surfactant resistance.
Olefin sheets that are non-woven and non-perforated comprise the DuPont™ Tyvek® HomeWrap®. High-density polyethylene(HDPE) fibers that are flash spun-bonded using heat and pressure form the uniform web that makes up the sheets. The webs create microscopic pores that resist bulk water and air infiltration while allowing moisture that enters the wall system to evaporate.
Typar® Building Wraps are a polypropylene nonwoven breathable weather membrane. A thin film coating on a polypropylene fiber mesh makes up the Typar® Building Wrap. The polypropylene fiber mesh provides tear resistance and supports the thin film layer, which provides the water and air resistance.
A comparison of Typar® Building Wrap and Tyvek® HomeWrap® shows they have several attributes in common: both achieve the minimum requirement for water and air resistance and are cold resistant. However, each product has advantages over the other product.
Barricade® Wrap Plus is a non-perforated, non-woven polyolefin material with a permeable membrane. Barricade® Wrap Plus’ micro-porous and breathable membrane controls moisture and air infiltration, yet its permeability allows evaporation of moisture vapor, should it make its way inside the wall system. Barricade® Wrap Plus’ film resists rain (bulk water penetration) and when installed properly acts as an effective drainage plane.
Barricade® Wrap Plus is a weather-resistant barrier for home construction that has all benefits and none of the disadvantages of either Typar® Building Wrap or Tyvek® HomeWrap®.
Like Typar® and Tyvek®, Barricade® Wrap Plus achieves the minimum requirement for water and air resistance and is cold resistant. However, there are several attributes of Barricade® Wrap Plus that make it the better choice in a house wrap over Typar® and Tyvek®.
A comparison of Typar® Building Wrap and Tyvek® HomeWrap® for residential construction found that they both fall short on several elements of a high-quality weather-resistant barrier. A better option for meeting and exceeding all the parameters of a high-quality weather-resistant barrier for home construction is the Barricade® Wrap Plus.
Barricade® Wrap Plus exceeds all the requirements of a WRB for home construction. It is water and air resistant, vapor permeable, highly durable and includes bulk water drainage.