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High Performance Flashing Safeguards against Moisture in the Proud Green Home

September 22nd, 2014 | In News, Projects: High Performance Building

The primary objective for the wall and roof system of a high-performance home is to provide resistance to weather and wear. The improved ability to withstand the elements is what gives the home higher durability, or resiliency. The envelope of the Proud Green Home of St Louis is designed and constructed accordingly to guarantee that the home will not only resist weather but perform effectively and efficiently.

Physics tells us that wet air will move towards a dry area where it will eventually evaporate. If water gets into the walls of a home and can’t evaporate it becomes trapped inside a wall where it may condense and stay wet, promoting mold growth.The Proud Green Home of St Louis utilizes the ZIP System by Huber and advanced framing to provide a solid, core structure for the home. The panels of the ZIP System are flashed using a high performance, permanent adhesive tape that effectively seals out moisture. Further, we have installed flashing at the foundation to provide additional resistance to moisture and weather.

A closer look at the flashing on the ZIP panels.

A secondary flashing system at the foundation of the home has been installed and designed such that any moisture that may find its way inside the walls has a path to exit and the walls are able to properly dry. When the windows are installed a different flashing system will be used that ties into the ZIP System providing a positive drainage plane as well.

Nontoxic sealants around windows and doors on the interior, durable caulk around the exterior, and foam insulation in door jams tightens the envelope, preventing air leaks, reducing heat transfer, and preventing the home from taking on additional moisture.

Read more about the Proud Green Home of St. Louis.


Proud Green Home of St. Louis Relies on Advanced Framing

The Proud Green Home of St. Louis employs a number of green building techniques and products with the goal of creating a high-performance home for the family that will live in it.

Building Envelope: ZIP System Panels & Advanced Framing

By: Matt Belcher, Verdatek Solutions

While system components such as the HVAC will likely be upgraded in the future with technology advances, it makes sense to invest in building a better thermal envelope by taking more time to design and examine the finer details, and utilizing advanced materials and methods. Knowing that sustainability is as much about controlling costs and protecting future equity position for our homeowners, we placed a lot of emphasis in building an outstanding high performance system with the sheathing and framing because these are the bones of the home that will be in place for decades to come.

We chose the 7/16” ZIP System roof and wall sheathing from Huber and advanced framing techniques for the Proud Green Home project. Together these building systems offer a more durable, efficient building envelope than traditional framing and sheathing techniques.

ZIP System

Proud Green Home of St. Louis

Subcontractors installing the framing and Huber ZIP system on Proud Green Home St. Louis. Photo Credit: Times 3 Photography

The home’s ZIP System creates a thermal envelope comprised of continuous, insulated panels sized from architect Curtiss Byrne’s plans. The panels were manufactured off-site from engineered, oriented strand board layered with a highly efficient insulating foam in the center. These continuous panels reduce the amount of seams in the thermal envelope to create a better barrier against air and moisture exchange. The ZIP System also meets the requirements for several green building codes, including the NGBS ICC-700 standards we are verifying Proud Green Home St. Louis through.

Similar to the modeling kits you may have used as a kid, once built the panels needed to frame the home were shipped to the site and fastened to the frame of the home by our subcontractors. The panels were then taped together using a specially constructed, permanent adhering tape to further reduce thermal bridging.

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Proud Green Home

Following the success of the first Proud Green Home located near Atlanta, Georgia, a new high performance home, The Proud Green Home of St. Louis, is under construction to deliver sustainable benefits to its owners and to educate and inspire building professionals and consumers about the benefits of building and living green. has partnered with Hibbs Homes, Verdatek Solutions, Curtiss W. Byrne Architect, and the High Performance Buildings Research Center, part of the Midwest Energy Efficiency Research Consortium at the University of Missouri-Columbia, to build the five-bedroom, 3,700 square-foot, Prairie-style home. Designed by architect Curtiss W. Byrne, the home in Wildwood, Missouri is expected to meet a number of prominent green building standards, including:

  • Energy Star for Homes
  • ANSI ICC-700 The National Green Building
  • DOE Zero Net Ready home
  • EPA Indoor airPlus
  • WaterSense

For the complete article, please visit

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