Is Roof Drip Edge Necessary?

A roof drip edge is a metal flashing that plays a crucial role in protecting your property from damage by preventing water from seeping under the shingles and into the roof decking. Despite its importance, some homeowners and contractors may question whether it’s necessary or just an unnecessary expense. In this article, we will explore the significance of roof drip edge and its benefits, including how it works, and why proper installation of water redirection is essential to the long-term health of your roof.

What is Drip Edge on a Roof?

The roof drip edge is a protective part of a roofing system typically made of metal and installed along the edge of the roofline. It is designed to direct water away from the roof and into the gutters, stopping water from penetrating the roof decking or getting underneath the shingles. The drip edge is the first line of defence against water damage and wind, protecting your roof and home exterior. In addition to its functional benefits, drip edge also enhances the roof’s appearance, giving it a finished look by covering the rough edge of the roof deck.

What Happens if You Don’t Put a Drip Edge on a Roof?

If a drip edge is not installed on a roof, it can leave your home vulnerable to water damage and wind. Without a drip edge, water can seep under the shingles and into the roof decking, potentially causing the wood to rot, internal structural damage, or producing harmful mould growth. Alternatively, the risk of water damage can also be mitigated by the professional installation of a starter course to redirect water into eavestroughs. This may result in the bending of the first row of shingles, but otherwise won’t cause significant damage to the roof. It is crucial to install a measure of protection, whether through drip edge or starter course, to shed water from the roof to prevent long-term damage.

How Much Drip Edge Do I Need?

The amount of drip edge needed for a roofing project will depend on the size and shape of the roof. To determine how much drip edge you need, measure the perimeter of your roof and add 10% to account for overlaps and cuts. The amount of drip edge needed will also depend on the pitch of the roof, as steeper roofs may require a longer drip edge to accommodate the angle. It’s important to ensure that the drip edge extends past the fascia board by at least 1/4 inch to ensure adequate water drainage. Consulting with a professional roofing company is your best bet to accurately measure your roof and ensure proper installation.