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

Posted on

Drip edge is a vital component of a building’s roof. It usually surrounds the roof’s perimeter. Since it is an important part of a roof, the installation procedure must be performed correctly.

You will learn how to install drip edge on a metal roof properly. There are several details that should not be missed during the installation. Only then, its function would be optimum.

How to Install Drip Edge on a Metal Roof

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. It has the main function of controlling water flow on the roof which has many implications. The water is directed to gutter on the ground.

how to install drip edge on a metal roof

Before knowing how do you install drip edge on a metal roof, it is important to learn what 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 wood is exposed to water too frequently, the piece will rot. Since drip edge faces in outward direction, it prevents water from hitting the under parts of the roof from sides.

b. Preventing entrance of small wild animals

If homeowner knows how to install drip edge on a metal roof, the gaps at bottom part of roof (usually between fascia and decking) will be closed. Such 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. Counter movement from gap

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

d. Protecting house overall integrity

Although the house is designed to be able to withstand extreme conditions, being exposed to drastic weather change and debris is still going to tear down its integrity. Learning how to install drip edge on a metal roof will help lessening 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 heavy weight is going to shorten the roof’s lifespan. By installing corrugated metal roof drip edge, it will be easier for that mass to move down or be removed.

Step by Step Install Drip Edge on a Metal Roof

  1. Build the lower rim of roof extended away from the fascia. The extension should be at least ¾ inch for it to work.
  2. Install sheet metal drip cap over the lower rim.
  3. Insert the wide flank of 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 roof by using special roofing cement. To apply the seal, it 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 short nails specific for roofing job at the upper part but underneath shingle or tile.

There are several things that you need to prepare before executing the method on how to install drip edge on a metal roof above. First, homeowner must purchase the drip edge made of metal that does not corrode easily. The size should be at least 36 gauges. It is important that all basic materials and tools prepared, safety gears included. Before the project starts, the roof must be cleaned from dust and debris first.

In addition to knowing how to install drip edge on a metal roof, it is important to get to know some types of drip edge. The first type is the 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 open hemmed that prevents water to stream upward due to capillary motion.

This passage should provide sufficient gist about what is drip edge and how to install drip edge on a metal roof. The knowledge is pretty crucial, especially during a building construction process. A house will not be complete without fully functioning roof.