When homeowners consider upgrading their roof, one of the most common questions is: “Can you install metal roofing over shingles?” The short answer is yes—metal roofing can often be installed directly over an existing shingle roof. But as with most major home improvements, the longer answer depends on your roof’s condition, your long-term plans, and the expertise of your installer.
Mountaintop Metal Roofing has helped countless homeowners make the switch, and we’ll walk you through the key details so you can make an informed decision about whether installing a metal roof over shingles is right for you.
Why Homeowners Want to Install Metal Roofing Over Shingles
Replacing a roof is a big investment, so it’s no surprise that homeowners look for ways to save time and money during roof installation. One of the biggest advantages of installing a metal roof over shingles is avoiding the messy and labor-intensive tear-off process.
Instead of stripping away old shingles, your contractor can prepare the existing roof and lay new metal panels or shingles on top. Benefits include:
- Lower labor costs – skipping the tear-off reduces hours of work.
- Faster roof installation – with less demolition, projects are completed more quickly.
- Reduced landfill waste – avoiding the disposal of tons of asphalt shingles is an environmentally friendly choice.
These advantages make installing a metal roof over shingles an attractive option, especially for homeowners focused on efficiency and sustainability.
Can You Put a Metal Roof Over Shingles in Any Situation?
While it’s possible in many cases, not every roof is a candidate. Before installing a metal roof over shingles, contractors look at a few important factors:
- Shingle roof condition – If shingles are curling, buckling, or rotting, they may not provide a stable surface.
- Number of shingle layers – Most building codes allow a metal roof over only one existing shingle layer. If you already have two or more, a tear-off will be required.
- Roof decking strength – Metal roofing is lightweight, but your roof deck must still be structurally sound.
- Local codes and HOA rules – Some areas restrict roofing overlays, so always check requirements.
An expert contractor will inspect these details before recommending whether you can install metal roofing over shingles.
How the Process of Installing a Metal Roof Over Shingles Works
If your roof is a good candidate, the installation process is straightforward but highly technical. Here’s how professionals typically handle it:
- Inspection and prep – The contractor ensures shingles are secure and the decking is solid. Damaged areas are repaired.
- Underlayment installation – A moisture-resistant barrier is installed between the shingles and new roofing material.
- Furring strips (optional) – In some cases, furring strips or battens are added to create a flat surface and ventilation gap.
- Metal roofing installation – New metal panels or shingles are installed using specialized fasteners.
- Flashing and finishing – Critical areas like chimneys, skylights, and valleys are sealed for long-term protection.
With proper installation, your new metal roof will look and perform just as well as if it had been installed on a bare deck.
Advantages of Installing a Metal Roof Over Shingles
Homeowners who choose this method enjoy multiple benefits:
- Cost efficiency – Eliminating the tear-off can reduce overall project expenses.
- Durability – Metal roofing lasts 50–75 years, far outpacing asphalt shingles.
- Energy efficiency – Metal reflects solar heat, reducing cooling costs in the summer.
- Weather resistance – Properly installed metal roofing protects against rain, snow, wind, and even fire.
- Environmentally friendly – Many metal roofs are made with recycled materials and are fully recyclable at the end of their lifespan.
By installing metal roofing over shingles, you combine immediate savings with long-term peace of mind.
Potential Drawbacks to Be Aware Of
Like any major home project, there are some considerations to weigh:
- Added weight – While metal is lighter than shingles, you’re still layering roofing materials. Structural integrity must be confirmed.
- Surface irregularities – Damaged shingles can create bumps that telegraph through the metal roof. Proper prep and furring strips help prevent this.
- Future tear-off – If you install over shingles now, you’ll eventually need to remove both layers when replacing the roof decades down the line.
These potential drawbacks underscore why it’s critical to work with an experienced contractor who can evaluate whether this option truly makes sense for your home.
Comparing Roofing Materials: Metal vs. Shingles
Many homeowners wonder why they should install a metal roof over shingles instead of simply replacing their shingle roof with more asphalt. The differences are striking:
- Longevity – Shingles typically last 15–20 years; metal lasts longer than 50 years.
- Maintenance – Asphalt requires periodic replacement; metal roofing is low-maintenance.
- Aesthetics – Metal roofing comes in a wide variety of styles, including designs that mimic traditional shingles, slate, or cedar.
- Investment value – Metal roofing offers a strong return, especially with a lifetime transferable warranty like Mountaintop Metal Roofing provides.
For homeowners planning to stay in their homes long-term—or those wanting to add resale value—metal roofing is a standout choice.
Cost Considerations When Installing a Metal Roof Over Shingles
The cost of installing metal roofing over shingles varies by roof size, layout complexity, and the specific roofing material. While metal may have a higher upfront price than traditional shingles, homeowners often see long-term value. Key advantages include:
- Skipping shred-and-tear of old shingles can save on labor and disposal costs.
- Decades of roof life—metal roofs often last 40–70 years, surpassing traditional roofs.
- Potentially increased resale appeal, especially when a transferable warranty is in place—when the installation method meets warranty requirements.
Important note: Many manufacturers require a clean, solid substrate for the warranty to remain valid. Installing metal roofing directly over shingles may void the material warranty unless the installation meets all manufacturer guidelines, including proper substrate and ventilation.
Can I Install Metal Roofing Over Shingles Myself?
Some homeowners ask if they can install a metal roof over shingles as a DIY project. While it might seem tempting, the reality is that roof installation requires specialized tools, training, and safety knowledge.
Improper installation can lead to leaks, void warranties, and create costly problems. For a roof that protects your home for decades, it’s best to trust professionals who specialize in metal roofing systems.
FAQs About Installing Metal Roofing Over Shingles
1. Can I put a metal roof over shingles without removing them?
Yes, in many cases, you can install metal roofing over a single layer of shingles if your roof deck is in good condition.
2. Will installing a metal roof over shingles make my roof too heavy?
Generally, no. Metal roofing is lightweight compared to other roofing materials, but a professional should always check your roof structure.
3. Does a metal roof over shingles last as long as one installed directly on decking?
Yes—if installed correctly, your metal roof will perform and last just as long, often 40–70 years.
4. Will my warranty still apply if I install over shingles?
Absolutely. Mountaintop Metal Roofing offers a lifetime, transferable warranty that applies regardless of whether you install over shingles or start fresh.
5. Is installing metal roofing over shingles worth the investment?
Yes. It reduces upfront costs, avoids tear-off mess, and gives you the long-term benefits of durability, efficiency, and lasting value.
Ready to Upgrade?
If you’ve been asking, “Can I install a metal roof over shingles?” the answer is likely yes—with the right contractor by your side. Mountaintop Metal Roofing specializes in helping homeowners throughout the Pacific Northwest upgrade to durable, eco-friendly, and beautiful metal roofing systems.
With decades of expertise, premium U.S.-made materials, and a lifetime transferable warranty, we make sure your roof isn’t just a covering—it’s peace of mind that lasts for generations.
Contact us today for a free estimate to call to schedule a consultation and see how a metal shingle roof can protect and elevate your home for a lifetime.