ZIP System® is a registered trademark of Huber Engineered Woods LLC.
In its ads, sales literature and in the field the manufacturer of Zip Systems ® exterior sheathing, makes numerous claims about the superiority of its product. DuPont™ Tyvek® weather barriers deliver excellent overall performance and as easy an installation process as compared to ZIP System® coated sheathing and tape. For an excellent weather barrier that’s fast and easy to install, insist on DuPont™ Tyvek®. It’s no fairy tale.
Two independent labs conducted ASTM E331 Water Infiltration Testing on exterior mockup walls constructed by professional framing contractors who were familiar with both the ZIP System® and the DuPont™ Tyvek® Building Envelope System. Each wall was tested at 2.86 PSF, 4.00 PSF and 6.24 PSF. Click on the videos to see the results.
Where does the water go? This short video shows the not so surprising results from a recent third-party test.
Does a mult-story wall create more opportunities for water to enter the wall? Watch these short videos to see the dramatic results.
The manufacturer of the ZIP System® claims that it installs 40% faster than the leading house wrap. In fact, in testing conducted at a respected, independent lab the results showed NO significant installation time advantage for ZIP System® Sheathing + Tape versus the DuPont™ Tyvek® Weatherization System + conventional OSB sheathing.
Does the ZIP System ® really install 40% faster?
The manufacturer of the ZIP System ® claims that overdriven fasteners aren’t a problem. However they appear to create a direct pathway for water to enter the wall system.
The following videos show tests of an overdriven fastener in the ZIP System ® and the same demonstration using DuPont™ Tyvek® Wrap Cap Staples. No industry-recognized test exists to test weatherization systems with overdriven fasteners. Therefore, DuPont selected the AATCC 127 Hydrostatic Pressure Test which measures the resistance of a fabric/material under a hydrostatic water column of 55 cm for 5 hours. No added pressure was applied. DuPont enhanced the test by adding a fastener centered within the column to test leakage at the fastener to simulate how water can leak through the fastener over time. DuPont believes that this test, as enhanced, fairly illustrates the likelihood of water penetration under real life conditions.
Huber claims overdriven fasteners don’t affect the performance of the ZIP System ® sheathing. This demonstration shows how that claim just doesn’t hold water.
After seeing how much water the overdriven fasteners allow to enter the ZIP Wall System, watch this demonstration to see what happens when Tyvek® Wrap Caps are put to the same test.