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.
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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. It has the main function of controlling water flow on the roof, which has many implications. The water is directed to the gutter on the ground.
Before knowing how you 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 drip edge faces in an outward direction, it prevents water from hitting the roof’s underparts from 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 is also preventing 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 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
- Build the lower rim of the roof extended away from the fascia. The extension should be at least ¾ inch for it to work.
- Install sheet metal drip cap over the lower rim.
- 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.
- 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.
- An additional securing method (optional) is applying short nails specific for roofing job at the upper part but underneath shingle or tile.
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, safety gear included. Before the project starts, the roof must be cleaned from 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 and how to install drip edge on a metal roof. Knowledge is pretty crucial, especially during a building construction process. A house will not be complete without a fully functioning roof.