What Does Flashing Do On a Roof?

Installing a New Piece of Chimney Flashing

Small Parts, Big Protection

Have you ever seen those thin metal strips surrounding various protrusions in your roof? These roofing segments play a crucial role in the defense of your home. Without them, your attic and ceiling would become a soggy mess every time it rained!

Today, we’re going to dive into the function and maintenance process behind these critical pieces. By the end, you should have a good idea of whether or it’s time to call for roof flashing repair! Let’s get to it.

What is the Purpose of Flashing?

Within the roofing system, there are a couple of places that are particularly susceptible to leaks. Think of any exposed ridges, vents, chimney corners, valleys, etc. where water might run into, and you’ll likely find flashing in these areas. In good condition, your home’s flashing safely redirects rain away from these vulnerable areas.


Is Flashing Part of the Roof?

Yes and no. Roof flashing is either installed beneath the shingles (or tile, etc.) or surrounding a protrusion in the roof. The metal strips used to cover the exposed areas must be nailed down into the nearby shingle and underlying storm guard. But it would be silly to consider roofing without flashing.


Is Roof Flashing Necessary?

Absolutely! Flashing is an essential ingredient in almost every roofing system. While typically installed on top of the primary roofing materials (tile, shingles, etc.), no system is complete without flashing protecting the water pathways. If your flashing expires and needs replacement, you’ll need to call your local professional as soon as possible for roof flashing leak repair!

Under or Over

Does Roof Flashing Go Under Shingles?

Many homeowners prefer it to, at least in the valleys of the roof. However, this does allow water to pour into the valley, potentially leading to leaks down the line. Residential roofing professionals generally recommend installing flashing above the shingles to prevent water from escaping downward.

Going Bad

Signs Your Flashing is Failing

If water is actively pouring in around the chimney or beneath another segment of flashing, you’ve waited too long to replace the damaged area. There are a few signs to spot that will warn you ahead of time. Take some time whenever you’re home to checkout the flashing around the chimney, ridges, etc. The metal (or whatever material your roof uses) should securely cover the area.

If part of the flashing is starting to pull away from its intended spot, you’ll need to arrange repairs ASAP. Dents also indicate your flashing is on its way out the door. Rusting affects many roofs along the flashing lines, especially those that use galvanized steel. If water manages to settle down and rest on the metal strip, corrosion eventually eats through the metal. Again: rusting means time to replace.

Your Roof and Flashing Repair

While healthy flashing easily directs water down and off the rooftop, damaged flashing may do just the opposite. If you’ve ever seen a roof funneling in water around the chimney or edges, you’ve likely witnessed a case of flashing gone bad. You need to arrange repairs as soon as possible, otherwise your home will be exposed to leaks, water damage, and potential mold growth.

Types of Roof Flashing

  • Galvanized Steel
  • Aluminum
  • PVC
  • Rubber
  • Specialized Felt
  • Copper

If you want your new flashing to last, stick aluminum or galvanized steel, which are rust-resistant materials. PVC works pretty well for non-asphalt based rooftops. Only use felt in tandem with a stronger flashing material; this will create an even stronger waterproof segment.

How Much Does it Cost to Repair Flashing on a Roof?

Obviously, price is going to vary from place to place. Your local expert probably won’t charge the same roof flashing repair cost as much as an Indianapolis, IN home repair service. Depending on your location and the size of the flashing section, you can expect to pay anywhere from $200 to $750 dollars. Chimney flashing repairs run towards the higher end of that pricing spectrum.

A Metal Covering and Flashing Atop a New Roof

Schedule Your Roof Flashing Repair!

It’s tempting to take a look at your durable metal flashing and think “When is that ever going to be a problem?” Violent storms and long-term corrosion however, take a serious toll on the health of your rooftop flashing. Given enough time, your home could be exposed to extensive rain leaks. Unless you like replacing damaged wood supports and paying thousands of dollars for mold removal (few do), make sure you’re quick to schedule your Yukon and Oklahoma City, OK roof flashing repair!

Looking for a local professional that offers lasting flashing solutions? Talk with one of our seasoned experts at Chisholm Trail Roofing & Construction! We’ve served countless homeowners and businesses in the community, and we’d love to serve you too. Give us a call today at (405) 470-9115 and arrange your roof repair with flashing replacement.