Roof Flashing

Roof flashing is thin metal material installed at vulnerable points where your roof meets walls, chimneys, or vents, creating a watertight seal that prevents leaks. Proper flashing protects your home's structure from moisture damage and costly repairs down the road. Whether you're dealing with worn flashing or planning a new installation, Angi connects you with local pros and helpful resources to keep your roof in top shape.

Related to Roof Flashing Service

Roof Flashing Service Articles and Advice
Kate Fann  •  May 3, 2026
How to Patch a Roof: 8 Potential Fixes for Small Holes
A leaky roof is less than ideal. Learn how to patch a roof while you wait for repairs from the pros to prevent further damage to your home.
Dan Simms  •  May 3, 2026
8 Common Causes for Brown Spots on Your Ceiling
Brown spots on the ceiling may be caused by a few reasons, including flashing failure, improperly installed HVAC units, and leaking pipes.
Deane Biermeier  •  May 3, 2026
How To Install Drip Edge On a Roof In Under a Day
This step-by-step guide will teach you how to install a drip edge on a roof in just a few hours, helping to protect your home from water damage.
Jacqueline DeMarco  •  May 3, 2026
What to Know About Installing a Drip Edge on an Existing Roof
Before you go about installing a drip edge on an existing roof, here’s a breakdown of everything you need to know about this home repair project.
Chelsea Van Bloom  •  May 2, 2026
What Is Chimney Flashing? Explore the Different Materials, Problems, and Cost
You might think you know how your chimney works, but what is chimney flashing? Learn about the roofing element that keeps your fireplace dry.
Dan Simms  •  May 2, 2026
9 Roof Flashing Types to Know
Roof flashing is crucial to protecting your home from water damage. Learn about the different roof flashing types and how they function in this guide.
Stephanie Mickelson  •  May 2, 2026
How to Fix a Leaking Roof From the Inside
Knowing how to fix a leaking roof from the inside can come in handy if you find a roof leak but are unable to do an exterior repair right away. Here is what to do.
Deirdre Sullivan  •  May 2, 2026
Who Fixes Chimney Flashing? Which Pro to Hire for the Job
When you need to hire a pro who fixes chimney flashing, look for a roof repair contractor or chimney repair person to preserve the structural integrity of your home.
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Common Roof Flashing Service Questions

Yes, all roofs can benefit from flashing. Roof flashing can protect a property from water damage, roof leaks, mold, and other serious issues. It’s vital if you’d like to extend the lifespan of your roof and avoid costly repairs down the road.

The average cost to replace chimney flashing professionally is between $400 and $1,600. Expect to pay $50 to $200 for the flashing sheets and basic supplies. While you can save big going down the DIY route, this is a technical job with high safety risks. The peace of mind you get from hiring a professional is often worth the extra cost.

A roof drip edge has a "T" shape and goes along the edge of the roof. Installers put it on the trim. On the other hand, a gutter apron flashing goes under the shingles and has an "L" shape. They're similar in price and both help make sure the rainwater flows to the gutters instead of pooling or seeping into the house.

Generally, to install roof flashing, you shouldn't use screws. Rather, it's best to use either roofing cement or nails. For the best results, match your nail type with the flashing materials. If you have aluminum flashing, use aluminum nails, and so on. You can use the same nails for your asphalt shingles and flashing.

Flashing is a piece of metal that helps direct rain and snowmelt on your roof away from your home, and drip edge is a type of flashing that you install at the ends of your roof slopes. Flashing can go in roof valleys, around your chimney, and around roof vents and other penetrations, while drip edge flashing always sits at the edges of your roof.