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
Chelsea Van Bloom  •  Apr 10, 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.
Em Norton  •  Apr 10, 2026
Everything to Know About Roof Flashing
Roof flashing directs water away from vulnerable areas of your roof. Knowing how to spot issues is essential to keeping your roof in good condition.
Jacqueline DeMarco  •  Apr 10, 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.
Kate Fann  •  Apr 10, 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  •  Apr 10, 2026
Roof Drip Edge Types: What to Know About Each One
While there are various styles, the right roof drip edge type for your home will depend on your roof type and the rainfall in your climate.
Dan Simms  •  Apr 9, 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.
Mizuki Hisaka  •  Apr 9, 2026
What Is a Roof Drip Edge and Why Does Your Home Need It?
What is a roof drip edge and why do you need it? Use this guide to learn about different roof drip edges and protect your home from water damage.
Lauren Bongard  •  Apr 8, 2026
30 Common Roofing Mistakes You Need to Know
Roofing mistakes can cost you money and ruin your home. Learn the 30 most common roof installation mistakes that DIY installers and contractors make.
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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.