Tyvek® HomeWrap®* and the ZIP System® are weather resistant barriers (WRB) applied under the siding of a home or commercial building. The goal of both these products is to ensure a structure is air- and moisture-resistant. Proper installation and integration are essential to attaining this goal. However, achievement of this goal is also dependent on the WRBs permeability, so water that penetrates the system can evaporate. Also, the WRB must have excellent strength and durability to minimize damage from outside elements (sun, wind, rain) or rough handling during the installation process. Damage to the WRB dramatically diminishes its performance.
While both Tyvek® HomeWrap® and the ZIP System provide air- and moisture-resistance, each has potential problems that may diminish their intended purpose. A better solution to a WRB is Barricade® Building Wrap. Barricade Building Wrap is strong, durable, permeable, and easy to install. It will also maintain its integrity against outside elements and rough handling before, during, and after installation.
Tyvek® HomeWrap® is made from non-perforated, non-woven, high-density polyethylene fibers that are fused together to form a uniform web. The web creates small pores that resist water and air penetration while allowing vapor to pass through. Tyvek® HomeWrap® is equivalent to a Grade-D 60 minute WRB. DuPont™ manufactures the Tyvek® HomeWrap®.
A benefit of Tyvek® is it comes in rolls which overlap at the seams to protect the structure from water intrusion. The further advantage of Tyvek® is it allows for weatherboard lap (external cladding) at window heads and other openings in a structure. Another benefit is the installation of Tyvek® is over the open stud framing and sheathing, which saves on material costs.
There are several problems with Tyvek® House Wrap that diminish its ability to resist water and air.
The ZIP System includes ZIP System sheathing panels and ZIP System tape. The panels are composed of OSB wood structural sheathing with a Grade-D 60 minute WRB exterior facer of medium density phenolic-impregnated polymer-modified material. The seam sealing self-adhesive tape is a polyolefin sheet with an acrylic adhesive backing. The ZIP System is manufactured by Huber Engineered Woods, LLC.
An advantage of the ZIP System, is that because the WRB is applied to the ZIP System panels at the factory, installation at the job site should be quick. Also, the ZIP System is resistant to wind damage. A third benefit is the product comes with a 30-year warranty, although it has some constraints.
There are several problems with the ZIP System that diminish its water- and air-resistance and its warranty advantage.
Barricade House Wrap is a perforated, high-quality, cross-woven polyolefin house wrap that meets and exceeds requirements for 1water- and 2air-resistance. It is also 3permeable. There are several reasons Barricade Building Wrap a better option for a WRB over the ZIP System and Tyvek® HomeWrap®.
*Tyvek® is a registered trademark of DuPont™.