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Drip Edge Installation on a Shingle Roof

Some bending tips and installation best-practices for drip edge that doesn't catch the eye
October 02, 2023

In this video, we'll cover the essential steps for installing drip edge flashing on a shingle roof.

Drip edges play a vital role in a properly installed shingle roof. They typically come in 10-foot lengths, but it's important to note that local codes may vary. Nevertheless, in my view, drip edge is a necessary component for any well-installed roof and is typically mandated by shingle manufacturers.

Drip edges are available in three standard colors: white, brown, and charcoal. One crucial feature of the drip edge is its 90-degree metal piece with a small kick at the bottom. This kick ensures that water sheds off the roof instead of running down the fascia board. For those with gutters, this setup helps direct water into the gutter, preventing damage to the fascia board.

We prefer a 2-inch by 2-inch drip edge. It strikes a balance, providing a clean look on the roof while ensuring proper waterproofing.

Installation Basics

To start, press the drip edge against the fascia board, leaving a slight gap for later adjustment. We're using a coil nail gun for installation, placing nails about every 10 to 12 inches.

When dealing with corners, it's important to cut a kick to allow for proper bending. Without this step, you risk bending the flashing incorrectly. This ensures a clean 90-degree angle and a tight fit.

Remember to maintain a slight gap between the fascia board and drip edge to facilitate gutter installation later on.

A minimum of three to four inches of overlap is recommended, though more won't hurt. Ensuring a clean line at the joint is essential. Consider aesthetics when placing joints. Starting with a full piece and situating joints at corners is generally a good practice.

Valley and rake drip edge Installation

In a corner with both a valley and rake, install the drip edge before the underlayment. Extend it 6 to 8 inches up the rake. Later, after underlayment installation, place the drip edge flashing on top.

On the valley side, create a gap between the roof and drip edge. This gap allows for future flashing installation. Ensure nails are spaced every 10 to 12 inches.

For proper underlayment placement, extend it over the drip edge at the eave. On the rakes, position the drip edge over the underlayment. This way, any wind-driven rain will flow over the drip edge, protecting the roof. Remember, when possible, use full-length drip edge pieces for a seamless appearance.

Clean drip edge on a rake

For a clean look, ensure the joints on a rake are straight and vertical. This area is highly visible, so proper alignment is key. Full pieces at the top side generally enhance the appearance, while a joint at the bottom is acceptable.

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