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If you're a homeowner who's been Googling, "Can you put a metal roof over shingles?"—you're not alone. We get this question all the time at Georgia Roof Advisors, especially from folks in places like Marietta and Roswell, GA who are looking to upgrade without breaking the bank.
The short answer? Yes, you can install a metal roof over shingles—and for many homes, it's actually a smart move. But before you go ordering panels, there are a few important things to know. We’ve seen it all—good installs, bad installs, and even a few "what were they thinking?" situations. Let’s break it all down for you.
Metal roofing is no longer just for barns and commercial buildings. In fact, according to the Metal Roofing Alliance, the U.S. metal roofing market has doubled in size over the last decade. As of 2023, 15% of residential roofs in the U.S. are metal, and that number keeps climbing.
Why the surge? A metal roof is durable, energy-efficient, and gives your home a sleek, modern look. But what really gets people interested is the idea of installing a metal roof over shingles, which can save both time and money.
Yes, you can put a metal roof over shingles, provided your existing roof meets a few conditions. Local building codes, the condition of your current roof, and the type of metal roofing all play a part.
We recently worked with a homeowner in Smyrna, GA who had a 12-year-old asphalt shingle roof that was starting to curl and fade. Instead of tearing off the entire roof, we were able to install a standing seam metal roof over the existing shingles—saving them over $3,000 in labor and disposal fees.
Tearing off shingles is messy and expensive. Depending on the size of your roof, removal alone can cost anywhere from $1,000 to $3,000. By installing your metal roof over shingles, you avoid that cost entirely.
When you skip the tear-off, your new roof can be installed in a fraction of the time. Most metal-over-shingle jobs take just 2–3 days. That’s a win for your schedule—and your nerves.
Did you know roofing waste makes up about 11 million tons of landfill waste in the U.S. each year? When you choose a metal roof over shingles, you're doing your part to reduce that number.
The old shingles can act as a buffer, adding another layer of insulation and even reducing noise during heavy rain. (Yes, despite what you've heard, metal roofs can be quiet.)
A properly installed metal roof can last 40–70 years, compared to just 12–20 for asphalt shingles. Plus, most metal roofs are Class A fire-rated, making them one of the safest options out there.
While going with a metal roof over shingles has lots of benefits, it’s not a one-size-fits-all solution. Here’s what we look for during our inspections:
In Marietta, GA, for example, building codes allow metal-over-shingle installations, but only if there’s just one layer of shingles. More than that, and removal is required.
We always check that the structure underneath is sound. If there’s sagging, rot, or water damage, it needs to be addressed first.
This one’s big. A metal roof without proper ventilation can trap moisture and cause mold or rot. We often install a breathable synthetic underlayment to help with this.
There are two main ways to install a metal roof over shingles:
Most of the time, we recommend high-temp synthetic underlayment. It adds a moisture barrier, smooths out rough spots, and helps your new roof breathe. Battens are usually reserved for heavily textured roofs or when extra ventilation is needed.
Sure—no roofing solution is perfect.
Covering shingles means we can’t always see what’s underneath. That’s why a thorough inspection is key.
If ventilation isn't done right, you could face condensation issues later on.
Some manufacturers might void warranties if proper installation practices aren’t followed—so always hire a licensed, insured roofing contractor like Georgia Roof Advisors.
When we did a project in Roswell, GA, the homeowner had three layers of shingles dating back to the early 2000s. In that case, we had to do a full tear-off to ensure a safe and lasting install.
Installing a metal roof over shingles is a smart, efficient way to upgrade your home—but only if it’s done the right way. That’s why Georgia Roof Advisors always starts with a free inspection to make sure your roof qualifies.
Whether you're in Marietta, Roswell, or Cobb County we’re here to walk you through your options and help you make the best choice for your home—and your wallet.
If you're thinking about installing a metal roof over shingles, give us a call or request a free estimate today. At Georgia Roof Advisors, we’ve helped hundreds of homeowners throughout North Georgia enjoy the beauty and durability of metal roofing—without the mess of a full tear-off.
1. Can I really install a metal roof over my existing shingles, or do they have to be removed first?
In many cases, a metal roof can be installed directly over one layer of existing shingles, but the condition of the roof and local building codes will determine whether that's possible.
2. Is it cheaper to put a metal roof over shingles instead of doing a full roof tear-off?
Yes. Skipping the tear-off can save money on labor, dumpster fees, and disposal costs, making the project more affordable.
3. Will a metal roof installed over shingles last as long as a metal roof installed on a bare roof deck?
When installed correctly with the proper underlayment and ventilation, a metal roof over shingles can provide the same long-term durability and lifespan.
4. Can putting a metal roof over shingles cause moisture or mold problems?
It can if the roof isn't properly ventilated. A professional installation with the right underlayment helps prevent trapped moisture and condensation issues.
5. How do I know if my current shingle roof is in good enough condition for a metal roof overlay?
A roofing inspection can identify issues like rotting decking, sagging areas, water damage, or multiple layers of shingles that could prevent an overlay installation.
6. Will a metal roof over shingles make my house louder when it rains?
No. In fact, the existing shingles and underlayment often help absorb sound, making modern metal roofs much quieter than most people expect.
7. How many layers of shingles can be underneath a metal roof?
Most building codes only allow a metal roof to be installed over a single layer of shingles. If there are two or more layers, a tear-off is usually required.
8. Is a standing seam metal roof the best option to install over shingles?
Standing seam metal roofs are one of the most popular choices because they offer superior weather protection, durability, and a clean, modern appearance.
9. Does installing a metal roof over shingles increase my home's value?
Many homeowners see increased curb appeal, improved energy efficiency, and a longer-lasting roofing system, all of which can contribute to higher resale value.
10. What's the biggest mistake homeowners make when installing a metal roof over shingles?
The biggest mistake is skipping a professional inspection before installation. Hidden structural issues, poor ventilation, or code violations can lead to expensive problems later.
