How to Install Drip Edge on a Metal Roof and What are Its Uses?

Drip edge is an essential component of a building’s edge of the roof. It usually surrounds the roof’s perimeter. Since it is a critical part of the roof, the installation procedure must be performed correctly to prevent water damage.

You will learn how to install a drip edge on a metal roof properly. Several details should not be missed during the installation to ensure its function is optimum.

How to Install Drip Edge on a Metal Roof

A drip edge is a metal flashing that tends to overhang the sides of a roof. There is a small size metal rim facing outwards and away from the roof fascia. Although it does not look like much, this component is made to have great structural integrity. Its main function is to control water flow on the roof, which has many implications. The water is directed to the gutter on the ground.

how to install drip edge on a metal roof

Before knowing how to install a drip edge on a metal roof, it is important to learn the purpose of having this component installed. Here are the reasons for that.

a. Protecting wood components from rotting

The house may have some wood parts, such as the fascia. It is a known fact that if the wood is exposed to water too frequently, the piece will rot. Since the drip edge faces in an outward direction, it prevents water from hitting the roof’s underparts from the sides.

b. Preventing entrance of small wild animals

If a homeowner knows how to install a drip edge on a metal roof, the gaps at the bottom part of the roof (usually between fascia and decking) will be closed. Such a gap tends to become a perfect entrance for small wild animals to get into the house. Thus, having this part properly installed can prevent infestation.

c. Countermovement from the gap

Drip edge installation also prevents movement between the deck board and fascia. When the gap enables movement, such as a water stream, the deck board will be soaked with moisture. This is how it can become moldy over time. The flashing can block the stream before it reaches the deck board.

d. Protecting house’s overall integrity

Although the house is designed to withstand extreme conditions, being exposed to drastic weather changes and debris is still going to tear down its integrity. Learning how to install a drip edge on a metal roof will reduce water exposure to the house and foundation.

e. Maintaining roof longevity

Water and melting snow can create heavy mass when stuck on top of the room without a way out. Such a heavyweight is going to shorten the roof’s lifespan. It will be easier for that mass to move down or be removed by installing a corrugated metal roof drip edge.

Step by Step Install Drip Edge on a Metal Roof

  1. Cut the drip edge to the required length, ensuring it extends beyond the corners of the roof to fully manage water flow.
  2. Install a sheet metal drip cap over the lower rim.
  3. Insert the wide flank of the drip cap underneath the first course of shingle or tile all the way through. The outer edge must be extended beyond where the gutter is located.
  4. Seal the flashing to the roof by using special roofing cement. Applying the seal would be better to put streaming drops of wet cement while pressing down on the shingle or tile.
  5. An additional securing method (optional) is applying roof nails, specifically roofing nails or screws, at the upper part but underneath the shingle or tile. It is crucial to consult the local building code to ensure compliance.

You need to prepare several things before executing the method on how to install a drip edge on a metal roof above. First, the homeowner must purchase the drip edge made of metal that does not corrode easily.

The size should be at least 36 gauges. All basic materials and tools must be prepared, and safety gear must be included. Before the project starts, the roof must be cleaned of dust and debris first.

In addition to knowing how to install a drip edge on a metal roof, it is important to know some types of drip edge. The first type is L-shaped, which is commonly used in roofs with low inclines. Its installation is on the deck board, over the fascia.

Meanwhile, the hemmed type is perfect for metal roofing. It has an open hem that prevents water from streaming upward due to capillary motion.

This passage should provide sufficient gist about what drip edge is. Knowledge is pretty crucial, especially during a building construction process. A house will not be complete without a fully functioning roof.

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RoofLast is an experienced author and roofing expert. With years of practical experience in the field authored several informative articles on various aspects of roofing, including installation, maintenance, and repair