Metal Roof Overlays in Georgia: Should You Install Over Shingles?

If your shingles are worn out but not falling apart, you might wonder: “Can I install a metal roof over my existing shingles?” The answer is yes—a metal roof overlay can be a smart option for many Georgia homeowners.

At Roof Nuts GA, we install and inspect metal roof overlays across Atlanta, Macon, Savannah, Columbus, and Augusta. We’ll help you determine if your current roof is a good candidate—or if a full tear-off is the safer, longer-lasting choice.

What Is a Metal Roof Overlay?

A metal roof overlay means installing new metal panels directly over your existing shingle roofing—without removing the shingles.

It’s allowed under IRC (International Residential Code) if:

• There’s only one layer of shingles

• The roof deck is solid and undamaged

• There’s no mold, sagging, or active leaks

This method saves time and cost—but isn’t right for every home.

Benefits of a Metal Roof Overlay

Metal-over-shingle installations can work well in many Georgia homes, especially when done by pros who follow code and manufacturer standards.

Advantages:

• Lower labor cost (no tear-off)

• Faster install—most jobs done in 1–2 days

• Less landfill waste

• Adds an extra layer of insulation

• Ideal for barns, garages, and rural homes

We commonly do overlays in areas like Warner Robins, Athens, and rural properties near Macon.

Metal Roofing Options for Overlays

Not all metals work the same over shingles. We install:

• Ribbed panels with foam closures to level the surface

• Standing seam with furring strips to create an air gap

• Galvalume or aluminum for better corrosion protection over asphalt

We follow manufacturer specs and ventilation guidelines to prevent condensation buildup between layers.

Our Metal Overlay Process

1. Free Inspection
   We check decking integrity, roof slope, attic ventilation, and shingle condition.

2. Fastener + Furring Prep
   If needed, we install wood battens or furring strips to improve airflow and leveling.

3. Panel Installation
   We install metal panels with foam closures and gasketed fasteners, sealed at seams and edges.

4. Trim, Flashing, and Cleanup
   We finish with new ridge caps, gable trim, pipe boots, and valleys that meet Georgia code.

Georgia Cities We Serve

We perform metal roof overlays in:

• Atlanta

• Macon

• Savannah

• Columbus

• Augusta

• Warner Robins

• Athens

• Roswell

• Johns Creek

• Sandy Springs

FAQ

💬 Can you put metal roofing over two layers of shingles?

No. Code allows overlays only over one existing layer of roofing. Two or more layers require a tear-off.

💬 Will a metal roof overlay last as long as a full replacement?

Maybe—but it depends on ventilation, fastener spacing, and what’s underneath. A clean deck usually lasts longer.

💬 Does a metal overlay affect attic ventilation?

It can. That’s why we add ridge vents or furring strips to create airflow channels where needed.

💬 Is it OK to do an overlay in Georgia’s heat and humidity?

Yes—if done right. We follow RAVC and IRC 2021 guidelines to avoid moisture trapping and heat build-up.

Thinking About a Metal Roof Overlay? Let’s Talk.

An overlay can save you money—but only if your roof is in good shape. At Roof Nuts GA, Jay Bradley and Blake Williamson will give you an honest assessment and clear options—overlay or full replacement.

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