Metal Roofing Over Shingles – Install Easily

Metal Roofing Over Shingles? Upgrading your roof with metal over old shingles is a great way to save time, money, and effort. Metal roofs are strong, long-lasting, and stylish, making them a popular choice for homeowners.

This method skips the messy job of tearing off shingles, saving you cash and cleanup. In this easy guide, we’ll walk you through every step to install a metal roof the right way.

Whether you’re new to DIY or have some experience, you’ll find clear instructions, helpful tips, and a checklist to keep you on track. Let’s dive in!

1. Why Choose Metal Roofing Over Shingles?

Here’s why putting a metal roof over shingles is a smart move:

Saves Time and Money

• Removing old shingles is hard work and costs a lot if you hire someone. Installing metal over them skips this step, saving you days and dollars.

Extra Layer of Protection

• The shingles underneath act like a shield, adding insulation and keeping water out. This makes your roof tougher against the weather.

Better for the Planet

• By leaving shingles in place, you keep tons of waste out of landfills. It’s an eco-friendly choice for green-minded homeowners.

Super Durable

• Metal roofs last 40–70 years, way longer than shingle roofs, which might need replacing every 15–20 years. One upgrade can protect your home for life.

Boosts Curb Appeal

• Metal roofs come in many colors and designs, from sleek to classic. They make your home look sharp and can raise its value when you sell.

Energy Savings

• Metal reflects sunlight, keeping your home cooler in summer. This can lower your energy bills over time.

Tired of constant shingle replacements and rising energy bills?”

Discover how a metal roof can save you thousands, last for decades, and slash your cooling costs, without removing old shingles!

2. Is It Legal to Install Metal Roofing Over Shingles?

In most areas, you can install a metal roof over one layer of shingles, but always check your local building codes. Rules vary, so call your local building department to confirm.

If your roof has two or more shingle layers, you’ll likely need to remove them first. Following codes keeps your project legal and safe.

Things to Check Before You Start

Before you climb up, make sure your roof is ready. Here’s what to do:

Roof Condition

• Inspect for damage like soft spots, leaks, or mold. Fix any issues with the shingles or wood decking. A weak base can ruin your new roof.

Local Building Codes

• Confirm that metal roofing over shingles is allowed. Ask about permits or inspections to avoid surprises.

Ventilation Needs

• Air must flow under the metal to prevent moisture buildup. Plan for ridge vents or air gaps to keep things dry.

Roof Strength

• Metal is light, but shingles add weight. Ensure your roof’s structure can support both. If unsure, ask a pro to check.

Weather Forecast

• Pick a dry, calm week for the job. Rain or wind makes roofing dangerous and tricky.

Worried about breaking building codes or facing fines?”
Learn the exact legal steps to install your new metal roof safely—and avoid costly code violations!

3. Choosing the Right Metal Panels

Not all metal roofs are the same. Here’s a quick guide to picking panels:

Material Types

• Steel: Strong, affordable, and rust-resistant with proper coating.

• Aluminum: Lighter, great for coastal areas, but pricier.

• Copper or Zinc: Fancy and long-lasting but very expensive.

Panel Styles

• Standing Seam: Sleek, modern, with hidden fasteners.

• Corrugated: Classic, wavy look, easier to install.

• Metal Shingles: Mimic traditional shingles for a familiar style.

Choose based on your budget, home’s look, and local weather. For example, aluminum is better near salty air. 

✅ Free Download: Metal Roof Over Shingles Checklist

Planning to install a metal roof over shingles? Don’t guess your way through it,  use our expert-approved checklist to get it right the first time! 🎁 Click below to grab your FREE copy and avoid costly mistakes! 👉 [Download the Checklist Now]

4. Tools and Materials You’ll Need

Gather these before starting to stay organized:

Tools

• Tape measure: For accurate measurements.

• Chalk line: To mark straight lines.

• Circular saw or metal shears: To cut panels cleanly.

• Drill/driver: For holes and screws.

• Screw gun: To fasten panels quickly.

• Ladder or scaffolding: For safe roof access.

• Safety gear: Gloves, harness, goggles, and non-slip shoes.

Materials

• Metal panels: Steel or aluminum, based on your choice.

• Wood battens (optional): 1×3 strips for furring.

• Underlayment: Synthetic or felt for protection.

• Fasteners/screws: Use screws with rubber washers.

• Ridge cap, flashing, trim: For sealing edges and joints.

• Sealant: To waterproof seams and vents.

Having everything ready prevents delays.

✅ Free Download: Metal Roof Over Shingles Checklist

Planning to install a metal roof over shingles? Don’t guess your way through it,  use our expert-approved checklist to get it right the first time! 🎁 Click below to grab your FREE copy and avoid costly mistakes! 👉 [Download the Checklist Now]

5. Safety First: Working on a Roof

Roofing can be dangerous. Follow these tips to stay safe:

• Use a harness: Anchor yourself to a secure point to prevent falls.

• Wear proper shoes: Non-slip boots grip better than sneakers.

• Work with a buddy: Have someone nearby in case of trouble.

• Avoid bad weather: Wet or windy conditions increase risks.

• Keep tools secure: Don’t leave them where they can fall or trip you.

Safety gear and caution are non-negotiable.

Step-by-Step Guide to Installing Metal Roofing

Here’s how to install your metal roof, step by step:

Step 1: Prepare the Roof Surface

• Clean the roof of dirt, leaves, and debris with a broom or blower. Hammer down loose shingles. Replace any rotted or soft wood decking. A solid foundation is critical.

2: Add Furring Strips (Optional)

• Furring strips create an air gap for ventilation. Nail 1×3 wood strips horizontally every 2 feet across the roof. This evens the surface and helps prevent moisture issues.

3: Lay Down Underlayment

• Roll out synthetic or felt underlayment over the shingles. Overlap rows by 4–6 inches to block water. Secure with roofing nails or staples. Keep it smooth and tight.

4: Install Metal Panels

• Start at the bottom corner. Place the first panel with a 1-inch overhang at the eaves. Align it carefully and secure with screws (rubber washers included) every 12–18 inches. Work up and across, overlapping panels slightly. Check alignment often to keep it straight.

5: Add Flashing and Trim

• Install drip edges along eaves and gables to direct water away. Use closure strips and sealant around chimneys, vents, and skylights. Good flashing prevents leaks, so don’t rush this step.

6: Install the Ridge Cap

• Place a vented or solid ridge cap at the roof’s peak. Secure with matching screws. This seals the top and gives your roof a finished look.

Feeling overwhelmed or worried about safety?”
Know when to DIY and when to call in the pros—avoid risky mistakes and keep your home protected!

6. Common Mistakes to Avoid

Avoid these errors to ensure a great result:

• No underlayment: This leads to leaks and damage.

• Poor ventilation: Trapped moisture causes mold or rot.

• Crooked panels: Misalignment looks bad and weakens seals.

• Wrong screws: Overdriven or incorrect screws cause leaks.

• Ignoring codes: Breaking rules can lead to fines or rework.

Check your work at every step.

✅ Free Download: Metal Roof Over Shingles Checklist

Planning to install a metal roof over shingles? Don’t guess your way through it,  use our expert-approved checklist to get it right the first time! 🎁 Click below to grab your FREE copy and avoid costly mistakes! 👉 [Download the Checklist Now]

7. Troubleshooting Common Issues

If problems pop up, here’s how to fix them:

• Leaks: Check for loose screws or gaps in flashing. Tighten screws or add sealant.

• Noisy panels: Add extra underlayment or foam strips to reduce rain noise.

• Condensation: Improve ventilation with vents or air gaps.

• Uneven panels: Remove and realign, ensuring a flat base.

Catch issues early to avoid bigger repairs.

Feeling overwhelmed or worried about safety?”
Know when to DIY and when to call in the pros—avoid risky mistakes and keep your home protected!

8. How Much Will It Cost?

Here’s a cost breakdown:

• Metal panels: $1.50–$6.00 per square foot.

• Underlayment: $0.15–$0.50 per square foot.

• Screws, flashing, trim: $300–$700 total.

• Furring strips: $100–$300 (if used).

• Labor (if hired): $2.00–$5.00 per square foot.

Total cost for an average roof: $5,000–$12,000. DIY saves on labor.

9. Pros and Cons of Metal Roofing Over Shingles

Pros

• Saves on shingle removal costs.

• Durable for 40–70 years.

• Energy-efficient, cutting cooling costs.

• Boosts home value and style.

Cons

• Risk of moisture if poorly installed.

• May void warranties if done wrong.

• Noisy in heavy rain without extra padding.

• Not suitable for damaged shingles.

Consider these to decide if it’s right for you.

10. Maintaining Your New Metal Roof

To keep your roof in top shape:

• Clean regularly: Remove leaves and debris yearly.

• Check screws: Tighten loose ones every few years.

• Inspect for damage: Look for dents or rust after storms.

• Clear vents: Ensure airflow to prevent moisture.

A little care keeps your roof lasting decades.

✅ Free Download: Metal Roof Over Shingles Checklist

Planning to install a metal roof over shingles? Don’t guess your way through it,  use our expert-approved checklist to get it right the first time! 🎁 Click below to grab your FREE copy and avoid costly mistakes! 👉 [Download the Checklist Now]

11. When to Hire a Professional

Call a pro if:

• Your roof has leaks, sagging, or multiple shingle layers.

• The roof is steep or complex.

• You’re not confident with heights or tools.

• Local codes require professional work.

Safety and quality matter most.

Feeling overwhelmed or worried about safety?”
Know when to DIY and when to call in the pros—avoid risky mistakes and keep your home protected!

Final Thoughts

Installing a metal roof over shingles is a budget-friendly, durable upgrade when done right. With clear steps, the right tools, and careful planning, you can transform your home’s roof.

Use this guide and checklist to stay organized, avoid mistakes, and keep safety first. If the job feels too big, reach out to a local roofing expert. Ready to start? Your new, long-lasting roof is just a few steps away!

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