We will work with your project team to ensure the most cost – effective package possible ,and work with your general contractor to make sure the windows are installed flawlessly ,with the best flashing tape,to provide a lifetime of reliable service.



Windows are known to be one of the most susceptible areas when it comes to water and air leaks. Even if you have done it hundreds of times, flashing tricky curves and corners in order to achieve the best watertight and energy-efficient seal can be a challenge.  German System Windows has an advanced line of flashing solutions that include a variety of tapes and a liquid flashing material.  ZIP System® Sheathing and Tape are a sheathing innovation that replaces the need for house wrap with a built-in water-restive barrier.After doing some research, we came across a  specialist named Ben Richardson. He says that the beauty of using ZIP System sheathing is the smooth, easy-to-flash exterior surface of the sheathing. Below are Ben’s best practices for window flashing using ZIP System™ tapes.

One And Done Sill Pan Solution

Traditionally, flashing a windowsill can require some special origami skills. Applying individual tape segments to corners to ensure a continuously sealed surface can be tedious. Ben recommends 6- or 10-inch ZIP System™ stretch tape for the job. This stretch tape is a unique composite acrylic tape that stretches in all directions. All proper application requires to easily flash the entire pan, is a single piece of tape. Like all ZIP System tapes, ZIP System™ stretch tape is pressure activated. For best adhesion, roll over the tape with a J-roller for a tight bond. This will smooth out any wrinkles that may have been created in application and avoids “fish mouth” areas where water could creep in. While it has an aggressive bond when completed, the unique stretchy composition of ZIP System stretch tape allows it to be pulled up and re-applied.

Proper Shingling

Not only is the Zip System an amazing product, but the shingling is very easy. First, install the window using a butyl or silicone sealant, the window manufacturer will know this best. Then flash over the nail flanges with Zip System® straight flashing tape. Make sure that the jamb flashing’s overlap the sill flashing at the bottom of the window, to achieve a correct shingling pattern and avoid creating a window leak path.

Finally, flash the head of the window. ZIP System straight tape also comes in 6–inch width that will give the best adhesion surface area and makes it easy to properly cover at least 2-inches above where the window flashing ends. Make sure this header flashing also extends at least 1-inch horizontally past your jamb flashing on either side. Again, rolling the tape with a J-roller helps activate the powerful acrylic bond and smooth out any wrinkles where leaks could occur during application. Be sure to seal the interior with a low-expanding foam.

ZIP System sheathing and tape products provide efficiency and ease of application on the job site. Backed by a 30-year Limited Warranty and 180-day exposure guarantee. Building teams are adopting these next-generation products as the next evolution in building enclosures.