Can You Put Metal Roof Over Shingles?
Thinking About Installing a Metal Roof Over Shingles?
Upgrading to a metal roof can feel daunting due to the cost and hassle of tearing off old shingles. The good news is you might not need to! Installing a metal roof over existing shingles can save time and money – but is it the right choice for your home? In this guide, we’ll cover when it’s safe to do so, what to watch out for, and how to ensure your new roof lasts for decades.
Can You Put a Metal Roof Over Shingles?
Yes. In many cases, metal roofs can be installed directly over existing shingles. This is known as a “roof-over” or “retrofit.” It’s faster and more affordable than tearing off old shingles, but it’s not suitable for every situation.
When Is It Okay to Install Metal Over Shingles?
A metal roof can be installed over shingles if:
- Your Shingles Are in Good Condition: The existing shingles should be flat, secure, and undamaged to provide a stable base for the metal panels.
- Your Local Building Codes Allow It: Some areas limit the number of roofing layers a home can have. Check with your local building department before planning a roof-over.
- Your Roof Structure Is Strong Enough: Although metal roofs are lighter than traditional asphalt shingles, adding a new layer still increases weight. An inspection can confirm if your roof can handle it safely.
When Should You Avoid Installing Metal Over Shingles?
Avoid installing metal roofing over shingles if:
- Your Shingles Are Damaged: Cracked, curled, or missing shingles create an unstable surface and can cause problems under the metal panels.
- There’s Moisture or Mold Damage: Existing leaks or mold must be addressed first to prevent further damage to your home’s structure.
- Your Roof Has Multiple Layers Already: Most codes allow a maximum of two roof layers. If you already have two, you’ll need to remove them before installing metal.
Why Choose Metal Roofing?
Metal roofs are known for their durability, longevity, and energy efficiency. They withstand heavy rain, hail, and snow, making them ideal for harsh climates. Additionally, metal roofs reflect heat, helping reduce your cooling costs in summer.
If you want the look of traditional shingles with the strength of metal, consider our metal shingle roof. It offers classic aesthetics combined with exceptional protection.
How Does Installation Work?
Instead of removing the old shingles, contractors can install the metal roof directly on top. This method:
- Saves labor costs
- Minimizes landfill waste
However, it’s crucial that your roofer inspects the existing roof for damage, moisture, and structural issues before installation.
Issues to Consider
- Weight Concerns: Ensure your roof can support the added weight, especially if your home is older.
- Ventilation: Proper ventilation prevents moisture buildup between the shingles and metal, avoiding mold and wood rot.
- Local Building Codes: Always check your local requirements to ensure compliance and safety.
Benefits of Installing Metal Over Shingles
- Cost Savings: Avoiding tear-off labor significantly reduces costs.
- Durability: Metal roofs can last 40–70 years, far outlasting traditional shingles.
- Energy Efficiency: Reflective metal panels reduce heat absorption, lowering cooling bills.
- Eco-Friendly: Less waste is sent to landfills, making it an environmentally responsible choice.
Steps to Install a Metal Roof Over Shingles
- Inspect Existing Shingles: Confirm they’re flat, secure, and in good condition.
- Add Furring Strips: Wooden strips create a gap between shingles and metal, improving ventilation and preventing moisture issues.
- Install Metal Panels: Attach the panels to furring strips using appropriate screws or fasteners.
- Seal Edges and Seams: Proper sealing ensures your roof is watertight and protected from leaks.
Final Thoughts
Installing a metal roof over shingles can be a smart, cost-effective choice if:
- Your shingles are in good condition
- Your roof structure is strong
- Local codes permit it
However, if there’s damage or moisture, removing the old shingles is necessary. By following this guide and consulting a trusted contractor, you’ll ensure a beautiful, durable metal roof that protects your home for decades.
Read more:
