T-Joint Flashing | Mastering the Basics | ZIP System® sheathing and tape

Zip System Sheathing

15 Aug 201802:18

Summary

TLDRThis video demonstrates proper flashing techniques when a vertical seam (TG) occurs above a window or door opening in the Zip System sheathing. It outlines three methods for flashing the intersection between the vertical seam and head flashing: 1) shingle vertical seam tape over the head flashing, 2) use 6-inch tape to cover the top flange of the window, and 3) apply two layers of 4-inch tape. Each option includes using drip edges and rolling the tape for proper installation. The video emphasizes following manufacturer guidelines for air sealing and offers more technical tips on the Zip System YouTube channel.

Takeaways

🛠️ The video covers proper flashing techniques when a T-joint occurs above a window or door opening.
🔧 The same considerations apply for T-joints above both window and door openings.
📏 Special attention is needed for any vertical seams that occur above window openings when flashing to the Zip System sheathing surface.
📋 Three options are provided for detailing the intersection between vertical seams and head flashing above a window.
📐 Option 1: Shingle the vertical seam tape over the top of the window head flashing, with a minimum of 2 inches overlap.
📏 Option 2: Use 6-inch Zip System tape to flash the window and cover the vertical seam tape.
🔨 Option 3: Use two layers of 4-inch Zip System tape to flash the top flange of the window.
💡 A tape-saving option involves using a shorter second horizontal piece that extends at least 2 inches past the vertical tape.
🔩 After flashing the window, install a drip edge and flash it to the Zip System tape using 4-inch tape.
📚 Follow manufacturer recommendations for air sealing gaps between the window frame and rough framing.

Q & A

What is the primary purpose of flashing in the context of the video?
-The primary purpose of flashing in the video is to protect the structure from water infiltration, especially at intersections like T joints above windows or door openings.
What special consideration must be given when flashing a window in the Zip System sheathing surface?
-Special consideration must be given to any vertical seams that occur above the window opening to ensure they are properly detailed and sealed.
What is the first option for detailing the intersection between a vertical seam and the head flashing?
-The first option involves shingling the vertical seam tape a minimum of two inches over the window head flashing, followed by the installation of drip edge and flashing it with 4-inch Zip System tape.
How is the 6-inch Zip System tape used in the second option?
-In the second option, 6-inch Zip System tape is used to flash the top flange of the window to the Zip System sheathing surface, ensuring proper sealing above the vertical seam.
What is the third option for flashing the top flange of the window?
-The third option involves using two layers of 4-inch Zip System tape to flash the top flange of the window. The first layer seals the flange to the sheathing, while the second layer overlaps the first by two inches.
What is the tape-saving option mentioned in the video?
-The tape-saving option involves using a shorter second horizontal piece of tape that extends a minimum of two inches past the vertical piece of tape onto the Zip System panel surface.
Why is it important to roll the tape after installation?
-Rolling the tape ensures a proper bond between the tape and the sheathing, preventing water infiltration and ensuring the flashing system functions effectively.
What is the purpose of the drip edge in the flashing process?
-The drip edge directs water away from the window or door opening, reducing the risk of water entering the structure and protecting the head flashing from potential water damage.
What are the manufacturer's recommendations for air sealing the window opening?
-The manufacturer recommends following guidelines for air sealing the gap between the window frame and the rough framing on the inside of the window opening to prevent air and moisture infiltration.
Where can viewers find more technical tips and product information?
-Viewers can find more technical tips and product information by visiting YouTube at youtube.com/zip_system_sheathing.

Outlines

00:00

🏠 Flashing Techniques for Windows and Doors

This video demonstrates proper flashing techniques for T-joints above windows and door openings. The focus is on flashing a window in the context of a Zip system sheathing surface, particularly addressing the intersection between the vertical seam above the window and the head flashing. The principles outlined apply to both window and door openings.

🔨 Option 1: Shingling Vertical Seam Tape Over Head Flashing

The first option for handling vertical seams above a window involves shingling the vertical seam tape over the top of the window head flashing. The tape should overlap a minimum of two inches. Afterward, a drip edge is installed above the window, and it is flashed using 4-inch Zip system tape, ensuring it is rolled for proper adhesion.

🛠️ Option 2: Using 6-Inch Zip System Tape for Vertical Seams

In this second method, 6-inch Zip system tape is used to flash the window directly to the sheathing surface, including any vertical seam above the window. The tape is rolled to ensure adhesion. Following this, a drip edge is installed and flashed with 4-inch Zip system tape.

📏 Option 3: Double Layer Flashing with 4-Inch Tape

The third option involves using two layers of 4-inch Zip system tape to flash the top window flange. The first piece of tape flashes the top flange, while the second piece is shingled over the first by two inches. This method includes an optional tape-saving approach by shortening the second piece. A drip edge is installed afterward, and the flashing is finished with 4-inch tape.

📑 Additional Considerations and Manufacturer's Recommendations

The final section covers sealing the gap between the window frame and the rough framing per the manufacturer's recommendations. It highlights the importance of following the manufacturer’s guidelines for air sealing and directs viewers to additional resources on the Zip system sheathing YouTube channel for more technical information.

Mindmap

Keywords

💡Flashing

Flashing is a waterproofing method used in construction, particularly in roofing and wall systems, to prevent water from entering the building envelope. In the video, flashing techniques are discussed in the context of window installations, emphasizing the importance of proper flashing to ensure that water does not seep into the building through the window openings.

💡TG (Tapered Gable)

TG, or Tapered Gable, refers to a type of roof structure where the gable (the triangular portion of the roof) is not parallel to the eaves but is instead tapered, creating a more complex roof line. The video mentions TG in relation to flashing techniques above window or door openings, indicating that special considerations are needed for these types of roofs.

💡Zipp System

The Zipp System is a type of sheathing system used in construction, designed to provide a weather-resistant barrier for the exterior of a building. In the script, the Zipp System is mentioned as the surface to which flashing is applied, highlighting its role in the building envelope's waterproofing strategy.

💡Vertical Seam

A vertical seam is a joint or seam in the roofing or siding material that runs vertically on the building. The video discusses how to detail the intersection between the vertical seam and the head flashing, which is crucial for preventing water infiltration at the window opening.

💡Head Flashing

Head flashing is a type of flashing that covers the top edge of a window or door frame to prevent water from entering the structure. The video provides different options for detailing the intersection between the vertical seam and the head flashing, emphasizing the importance of this component in the flashing process.

💡Drip Edge

Drip edge is a flashing material installed along the lower edge of a roof or at the bottom of a window to direct water away from the building. In the script, drip edge is mentioned as part of the flashing process above windows, illustrating its role in directing water away from the window and preventing leaks.

💡Tape

In the context of the video, tape refers to a type of adhesive flashing material used to seal joints and seams in the building envelope. The script describes various methods of using tape to flash windows to the Zipp System, indicating its versatility and importance in the waterproofing process.

💡Sheathing

Sheathing is the exterior layer of a building's structural framework, typically made of plywood or oriented strand board (OSB). The video mentions sheathing in relation to the Zipp System, indicating that the flashing techniques discussed are applied to this layer of the building.

💡Air Sealing

Air sealing is the process of sealing all gaps and cracks in a building's structure to prevent air leakage. The video mentions following the manufacturer's recommendations for air sealing the gap between the window frame and rough framing, highlighting the importance of air sealing in addition to waterproofing.

💡Rough Framing

Rough framing refers to the initial stage of framing a building, where the basic structure is built before the installation of finishes. The video discusses air sealing the gap between the window frame and rough framing, emphasizing the need for a sealed building envelope at this early stage of construction.

💡Manufacturer's Recommendations

Manufacturer's recommendations are the guidelines provided by the makers of construction materials or systems, such as the Zipp System, to ensure proper installation and performance. The video advises following these recommendations for air sealing, indicating the importance of adhering to the manufacturer's specifications for successful construction projects.

Highlights

The video covers proper flashing techniques for a TG joint above a window or door opening.

Special consideration is needed for vertical seams above the window when using the Zipp system sheathing surface.

Three options are provided for detailing the intersection between the vertical seam above the window and the head flashing.

Option one involves shingling the vertical seam tape over the top of the window head flashing, with a minimum two-inch overlap.

In the first option, a drip edge is installed above the window and flashed to the Zipp system tape using a 4-inch tape.

Option two uses 6-inch Zipp system tape to flash the window and cover the vertical seam above the window.

In option two, after installing the window, a drip edge is flashed to the Zipp system using a 4-inch tape.

Option three involves using two layers of 4-inch Zipp system tape to flash the top flange of the window.

In the third option, the second horizontal piece of flashing tape overlaps the first by two inches.

A tape-saving technique is to use a shorter second horizontal piece that extends a minimum of two inches past the vertical seam tape.

In all options, the tape must be rolled after installation to ensure proper adhesion.

After installing the window, a drip edge is installed above the window and flashed with 4-inch Zipp system tape.

Manufacturers recommend sealing the gap between the window frame and rough framing for air sealing.

The video emphasizes following the manufacturer’s recommendations for proper installation and air sealing.

More technical tips and information about Zipp system sheathing can be found on their YouTube channel.