Zip Roof Sheathing Vs Plywood

Huber the manufacturer of zip tells customers that you don t need roofing underlayment if you use taped zip sheathing on your roof.

Zip roof sheathing vs plywood.

Zip system zip 1 2 cat ps2 10 tongue and groove utility osb application as 4 x 8. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Installation manual zip system sheathing wall and roof zip system sheathing and tape fact sheet integrated sheathing or housewrap white paper zip system brand brochure house of brands brochure view all. Zip system 5 8 cat ps2 10 osb sheathing application as 4 x 8.

Since roofing underlayment is a code requirement i would check with my local code enforcement official to make sure that the official agrees before deciding whether it makes sense to skip the underlayment. The zip system product is about the same thickness as plywood and when subjected to a buildup of moisture can deteriorate at a much quicker rate than plywood. If you are sticking with the original sheathing or boards if that s what it had i d suggest adding a vapour permeable membrane over top as an air barrier. Zip systems wall and roof sheathing review huber engineered woods introduced these two new new structural sheathing products just over a year ago.

They are installed the same as typical osb or plywood sheathing to create a weather proof and draft free barrier. It is not recommended for use as a durable sheet panel product. Sheathing panels are butted and taped creating a reverse lap the sheathing boards are butted together with a 1 8 inch gap between panels. Huber manufactures the premium osb products such as advantech sheathing which many builders prefer over plywood due in part to quality problems they were seeing in plywood.

If you do add new plywood sheathing you could just tape the joints and it will act as your air barrier. Scroll down 01. Osb is okay but plywood handles moisture a bit better. Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away.

How does this product compare to using plywood and a housewrap such as tyvek. This joint is then covered with the seam tape.