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How to Install a Drip Edge

Valerie Albarda

By Valerie Albarda
Published March 7, 2025

Drip edge flashing is a crucial component in roofing systems. It's a metal strip installed along the roof's edges. Its primary function is to direct water away from the fascia and into the gutters, preventing water damage and extending the life of your roof. We’ll show you how to install drip edge.

Tools and Materials

Tools

Materials

Note

Product costs, availability and item numbers may vary online or by market.

What is Drip Edge?

Drip edge flashing, also known as drip edge, is part of a roofing system that’s used to protect the edges of the roof, the eaves and rakes from water damage. It’s flashing that’s typically installed under the roofing material and allows water run-off to drip clear of underlying construction.

Drip edge is beneficial in many ways:

  • It helps to stabilize your roof.
  • It protects your roof from ice dams.
  • It redirects water to the gutter, keeping excess water from pouring down onto your porch or deck.
  • It keeps pests out of your home by covering the roof’s edge.
  • It extends the life of your roof.
  • It acts as a fascia guard for your roof.

Installing Drip Edge

Before you begin installing drip edge, inspect the roof’s install surface area for any damage. Make any necessary repairs before proceeding with the installation. Remove any dirt, debris or damaged flashing from the edge of the roof. This will allow for a clean and smooth surface for attaching the drip edge and ensure a secure installation.

IRC Requirements Summary

The International Residential Code (IRC) requires the installation of drip edge flashing on shingle roofs.

  • Drip edge must be installed at both the eaves and rake edges of the roof.
  • Drip edge should extend at least 1/4 inch below the roof sheathing and 2 inches back onto the roof deck.
  • Adjacent sections of the drip edge should overlap by at least two inches.
  • Drip edges will be mechanically fastened to the roof no more than 12 inches apart.
  • Underlayment must be installed over the drip edge along eaves and under the drip edge along rake edges.

Good to Know

The International Residential Code (IRC) requires the installation of drip edge flashing on shingle roofs. Before installing, check your local building codes for specific drip edge installation requirements in your area.

How to Install Drip Edge

A New Drip Edge is in Your Roof’s Future

Drip edge is a valuable tool in your roofing system. If you know your way around a roof and you’re handy with tools, this would be a good weekend do-it-yourself (DIY) project, and it’s an affordable way to help prevent future roof problems. Stop by Lowe’s and a friendly Red Vest associate will help you with all the tools and materials you need to get you started.