How to Install Metal Roofing Like a Pro (7 Easy Steps)

If you’re researching how to install metal roofing, you already know metal is one of the most durable and efficient roofing systems on the market. But not all installations are the same, and how your roof is installed makes a huge difference in performance and longevity.

In this blog, you’ll learn:

• The step-by-step process
• Common mistakes to avoid
• Why working with experts like CTA Exteriors ensures long-term performance

Whether you’re replacing an old asphalt roofing system or considering new technology like Timberline Timbersteel metal shingles, this guide will help you understand the process and benefits of upgrading to a steel roof.

⏰ Why Metal Roofing Is a Long-Term Investment

Before jumping into how to install metal roofing, it’s important to understand why this system continues to grow in popularity among homeowners.

Built to Last

A high-quality metal roof can last 40 to 70 years, compared to 15 to 25 years for traditional asphalt roofing. It resists fire, wind, hail, and pests, which means fewer repairs and better long-term value.

Energy Efficient and Environmentally Friendly

Metal panels reflect sunlight, which helps reduce indoor cooling costs. Many steel roof systems are made from recycled materials and are fully recyclable at the end of their lifespan, making them a more sustainable choice for the entire roof.

New Design Options Are Expanding

Beyond the classic vertical seam styles, metal shingles are now available in designs that mimic slate or wood shake. One standout is the Timberline Timbersteel system, which combines the aesthetic of traditional shingles with the strength and performance of steel. CTA Exteriors is currently testing this exciting product as part of our commitment to offer premium options.

🤔 Important Pre-Installation Considerations

Planning is a critical step when installing a new metal roof. From selecting the material to preparing the structure underneath, here’s what every homeowner should know.

Know the Difference: Concealed vs. Exposed Fasteners

Unlike many contractors, CTA Exteriors installs only concealed fastener systems. These systems secure the metal panels without leaving fasteners exposed to the elements. This helps eliminate leaks, reduces maintenance, and results in a cleaner appearance.

• Long-term protection: Concealed systems prevent water from entering around screw heads.
• Better aesthetics: No visible fasteners means a sleeker, more modern finish.
• Less maintenance: Fewer exposed points of failure compared to traditional methods.

Inspect the Roof Deck

Before installation begins, the roof deck must be in solid condition. If there are any signs of rot, sagging, or water damage, repairs will need to be made first. The performance of the entire roof depends on the stability of the structure beneath it.

• Proper ventilation and insulation also support long-term performance and energy efficiency.

Choose the Right Underlayment

Synthetic underlayment is preferred over traditional felt. It’s lighter, more water-resistant, and works well with concealed fastener systems. Some applications may also include double sided tape and closure strip components for added sealing at seams and edges.

✅ 7 Easy Steps to Install Metal Roofing

1. Tear Off the Existing Roofing
   Why it matters: Removing your old asphalt roofing exposes the roof deck, allowing for a full inspection and preparation. Installing metal over damaged or soft decking leads to premature problems.
   Pro tip: CTA Exteriors always inspects and reinforces the deck before installing metal panels.
2. Install Ice and Water Shield + Synthetic Underlayment
   Why it matters: This layer protects against wind-driven rain and helps manage moisture under the metal roof. We roll out synthetic underlayment from eaves to ridge, overlapping as needed.
   Pro tip: We use double sided tape along seams for extra bonding and install closure strips where needed to seal ridges and gaps.
3. Install Eave Trim and Drip Edge
   Why it matters: These components help direct water into the gutters and prevent backup under the panels. Trim and drip edge also frame the edges of the roof for a clean finish.
   Pro tip: We secure trim with stainless fasteners that won’t rust or stain the finish.
4. Install Concealed Fastener Panels
   Why it matters: Metal panels are attached using a hidden fastening system, which locks the panels in place without leaving screw heads exposed. This creates a clean look and long-lasting seal.
   Pro tip: CTA Exteriors uses factory-formed interlocking seams for strength and uniformity.
5. Seal Transitions with Closure Strips and Flashing
   Why it matters: Every vent, skylight, or ridge line needs to be properly sealed. We use closure strips beneath the ridge cap and in valleys to stop wind-driven rain.
   Pro tip: Flashing is installed at all roof transitions to ensure complete protection.
6. Install Ridge Cap and Final Trim
   Why it matters: The ridge cap covers the peak of your roof and ties both sides together. It also allows airflow if ridge ventilation is used.
   Pro tip: Our concealed fastening system ensures a watertight finish without sacrificing airflow.
7. Final Inspection and Clean-Up
   Why it matters: Every fastener, seam, and edge is double-checked for precision. This helps catch potential issues early and ensures your new steel roof performs exactly as intended.
   Pro tip: CTA Exteriors does a complete site clean-up and provides a final walkthrough with every customer.

❌ Common Metal Roof Installation Mistakes To Avoid

Correct installation is critical to maximizing the life of a metal roof. Here are the biggest mistakes we see from less experienced contractors:

Using Exposed Fasteners

Exposed fasteners leave screw heads out in the open, where they can rust, loosen, or allow water to enter. CTA Exteriors uses only concealed fastener systems for better protection and fewer maintenance issues.

Improper Panel Alignment

If metal panels are misaligned during installation, it affects how water runs off and can create weak spots. Our crews use laser-aligned guides to ensure every seam is straight and secure.

Forgetting Closure Strips

Closure strips are essential for sealing gaps at ridges and other transitions. Skipping them increases the risk of leaks, pest intrusion, and heat loss.

Underlayment Mistakes

Low-grade or poorly installed underlayment can lead to mold, rot, and roof failure. We use only premium materials and make sure all seams are sealed with double sided tape for maximum moisture control.

❓ FAQs About Installing a Metal Roof

How long does a metal roof last?

Most metal roofing systems last 40 to 70 years. That’s far longer than a standard asphalt roofing system, which typically lasts 15 to 25 years.

Is a metal roof more expensive?

The upfront cost is higher, but long-term savings come from reduced maintenance, fewer replacements, and better energy efficiency. Over decades, a metal roof often saves more money than it costs.

Can a metal roof go over shingles?

Sometimes, but CTA Exteriors usually recommends full removal to inspect and prepare the roof deck properly. This ensures a longer-lasting, cleaner installation.

Are metal shingles available?

Yes. New products like Timberline Timbersteel offer the appearance of traditional shingles with the strength and durability of metal. CTA Exteriors is currently evaluating this system as a premium option for homeowners.

❗️ Why CTA Exteriors Is the Right Choice for Metal Roofing

Installing a metal roof requires precision, planning, and the right materials. At CTA Exteriors, we specialize in high-performance steel roof systems using only concealed fasteners and the latest product technology.

• We don’t cut corners
• We care about every detail
• We treat your home like it’s our own

If you’re considering metal roofing for your home, trust CTA Exteriors to get the job done right. Contact us today for a free estimate and learn how to install metal roofing the professional way—with concealed fasteners, clean finishes, and top-quality results.