Valley Flashing in Georgia: Protecting the Most Leak-Prone Part of Your Roof

Roof valleys do the hardest job—they collect and direct all the rainwater from intersecting roof planes. That’s why proper valley flashing is critical to a leak-free roof.

At Roof Nuts GA, we install valley flashing that’s built to handle Georgia’s heavy rains and long seasons. Whether you're getting a roof replacement or fixing storm damage, we ensure your valleys are sealed tight and done right.

What Is Valley Flashing?

Valley flashing is a metal or underlayment barrier installed where two roof slopes meet. It directs water safely off the roof and into your gutters, preventing it from seeping under shingles.

There are two main types used in Georgia:

1. Open Valley (Metal Flashing)

• Uses a visible strip of metal (aluminum or galvanized steel)

• Water runs directly on the flashing

• Easier to inspect and maintain

• Strongest protection during heavy rainfall

2. Closed Valley (Shingle Overlap)

• Shingles overlap across the valley

• Flashing is hidden underneath

• Cleaner appearance but slightly less durable over time

We install both types depending on slope, shingle style, and customer preference.

Why Valley Flashing Matters in Georgia

Georgia sees intense rain, wind, and occasional tropical systems. Roof valleys take the brunt of it—especially in cities like Atlanta, Macon, and Savannah.

Here’s why proper valley flashing is essential:

• Handles more water flow than any other roof area

• Prevents leaks at shingle seams and joints

• Stops wind-driven rain from lifting or penetrating shingles

• Protects decking from long-term moisture damage

Without it—or with improper installation—you’re almost guaranteed to see rot, mold, or interior leaks within a few years.

Our Valley Flashing Installation Process

At Roof Nuts GA, we follow IRC 2021, NRCA standards, and manufacturer specs for every valley we flash.

Step-by-Step:

1. Tear-Off & Inspection
   We remove all old shingles and check decking for water stains or soft spots.

2. Valley Underlayment
   We install a layer of ice & water shield along the full length of the valley for waterproofing.

3. Install Flashing (if open valley)
   We place metal flashing (typically 24-inch wide), center it, and nail it outside the water channel. Ends are crimped or sealed.

4. Lay Shingles (closed or open)

• For open valleys: shingles are trimmed and spaced with a clean-cut line down the valley

• For closed valleys: shingles overlap each other and are sealed over flashing underneath

5. Seal & Nail According to Wind Zone
   Fasteners are placed away from the valley center, and we avoid cutting corners—literally and figuratively.

Materials We Use

• Galvanized steel for durability and corrosion resistance

• Aluminum for rust-free installs in coastal areas

• Ice & water shield underneath every valley for secondary protection

• Compatible with Owens Corning, Atlas, IKO, and Malarkey shingle systems

FAQ

💬 Do I need valley flashing if I have synthetic underlayment?

Yes. Synthetic underlayment is installed across the entire deck, but valleys require an extra layer of protection due to concentrated water flow.

💬 Which is better—open or closed valley?

Open valleys with metal flashing last longer and offer better drainage. Closed valleys look cleaner but may wear faster in high-flow areas. We’ll recommend what fits your roof slope and budget best.

💬 Is valley flashing covered by insurance?

Yes. If your roof is being replaced due to storm damage, valley flashing should be included in the repair scope. We’ll help you ensure it’s accounted for.

Trusted by Georgia Homeowners

From Warner Robins to Athens and throughout metro Atlanta, Jay Bradley and Blake Williamson at Roof Nuts GA install and repair roof valleys with precision and care.

📞 Call 404-476-6851 or book a roof inspection at https://RoofNutsGA.com