Specification

DO I NEED TO INSTALL EXTRA TAPE IN ROOF VALLEYS?
We recommend you using 6” wide ZIP System tape for valley seams and for window and door
flashing. If you do not have 6” wide ZIP System tape, we recommend that you overlap two
pieces of the 3 ¾” seam tape by at least 1" in the valleys. Water tends to migrate towards the
valleys and it is important to pay close attention to tape installation in these areas. The ZIP
System tape gun kit comes with a valley/corner tool that will allow you to apply pressure to the
tape in valley areas of taping.
How Do I Install ZIP System Tape?
The ZIP System tape gun or ZIP System tape roller are specially designed for ease of tape
application and can be purchased at your ZIP System wall retail locations. The gun and roller
not only makes tape application fast and easy, it also provide a high quality tape seal.
Can ZIP System Tape Be Installed in the Rain?
The surface of the ZIP System sheathing shoud be dry to the touch with not standing water or
frost prior to tape installation.
Do Fastener Heads Need to Be Taped Over?
Fastener heads are not required to be taped over.
Can ZIP System Tape Be Installed in Cold Temperatures?
ZIP System tape should not be installed when the temperature of the tape is below 20 degrees
Fahrenheit (-6.7 degrees Celsius.
Do I Need to Tape All of the Seams Between the ZIP System Sheathing Panels?
Yes, in order for ZIP System sheathing to function as a roofing underlayment when used on the
roof or as a water-resistive barrier and air barrier on the walls, all panel seams must be taped
with ZIP System Tape.
How Many Rolls of Tape Do I Need?
Although all projects are unique, experience has shown that 1-roll of tape is needed for
approximately 7-sheets of ZIP system sheathing. This should only be considered a general “rule
of thumb” when ordering materials with the understanding that some jobs may require more
or less depending on specific project.