Avoiding Window Leaks: How to Flash Window Jambs | ZIP System sheathing and tape

Summary

In this video, Ben from Huber Engineered Woods demonstrates the use of Zip System flashing tapes for quick and leak-free window flashing. He explains the process of installing temporary shims, applying exterior-grade sealant, and installing the window according to manufacturer's specs. Ben then shows how to apply Zip system flashing tape to the window jam flanges, ensuring proper overlap and shingling pattern for optimal sealing. The video concludes with a teaser for the next part, focusing on header flashing installation.

Takeaways

• 🔧 Flashing tape is used to prevent window leaks.
• 🛠️ Begin by flashing the sill pan before installing the window.
• 📏 Place temporary shims at each corner of the rough opening and along the nail pattern.
• 🧱 Use exterior-grade sealant, preferably 100% silicone or polyurethane, for a strong bond.
• 🔨 Install the window according to the manufacturer’s specifications, ensuring it's square, plum, and level.
• 🚪 Fasten the window to the opening, then remove the temporary shims.
• 📑 Apply flashing tape to the window jamb flanges, ensuring overlaps to prevent leaks.
• 🧰 The jamb flashing should overlap the sill flashing and extend up to the midpoint under the header flashing.
• 🛑 Ensure proper shingling pattern with the jamb flashing to direct water away from the window.
• 🛞 Use a Zip system roller to seal the flashing tape, addressing wrinkles and air pockets to avoid water infiltration.

Q & A

What is the primary purpose of using Zip system flashing tapes?

The primary purpose of using Zip system flashing tapes is to prevent leaks around windows by sealing the rough opening, ensuring a watertight barrier.

Why are temporary shims placed at each corner of the rough opening?

Temporary shims are placed at each corner of the rough opening to help properly position and level the window during installation.

What type of sealant is recommended for installing the window?

An exterior-grade sealant, such as 100% silicone or polyurethane, is recommended for installing the window to ensure a strong, durable bond.

What should be checked after installing the window to ensure correct positioning?

After installing the window, it is important to check that the window is square, plumb, and level to ensure correct positioning.

When can the temporary shims be removed?

The temporary shims can be removed after the window has been properly fastened to the opening.

What is the correct technique for applying Zip system flashing tape to the window jamb flanges?

The correct technique involves overlapping the jamb flashing over the sill flashing at the bottom and extending it up to the midpoint where the header flashing will go, ensuring a proper shingling pattern.

Why is it important to use a shingling pattern for the flashing tape?

A shingling pattern is important to ensure that water is directed away from the window and does not accumulate behind the flashing, which could lead to leaks.

What tool should be used to seal the flashing tape to the sheathing?

A Zip system J roller should be used to press and seal the flashing tape to the sheathing for a secure bond.

What are 'fish mouths,' and why should they be avoided?

Fish mouths are wrinkles or air pockets that form in the flashing tape, creating potential areas where water can seep in, leading to leaks. They should be avoided to ensure a watertight seal.

Where can you find additional information on installing header flashing?

Additional information on installing header flashing can be found by visiting the Zip system website at zip system.com, as mentioned in the video.