How to Put a Steel Roof Over Shingles

If you’re considering a roofing upgrade, putting a steel roof over your existing shingles can be a cost-effective and efficient solution. This process not only provides added durability and longevity to your roof but also saves you the labor and cost of tearing off the old shingles. In this guide, we’ll walk you through the steps on how to put a steel roof over shingles, ensuring a successful and durable roofing project.

How To Put Steel Roof Over Shingles

Benefits of Installing a Steel Roof Over Shingles

Why Choose Steel Roofing?

Steel roofing is known for its durability, longevity, and energy efficiency. By opting for steel roofing, you can enjoy several benefits:

  1. Longevity: Steel roofs have a long lifespan, often lasting 50 years or more, which is significantly longer than traditional asphalt shingles.
  2. Durability: Steel roofs are resistant to extreme weather conditions, including high winds, hail, and heavy snow loads, making them an excellent choice for various climates.
  3. Energy Efficiency: Many steel roofs are designed with reflective coatings that reduce heat absorption, helping to keep your home cooler and potentially lowering your energy bills.
  4. Minimal Maintenance: Steel roofs require minimal maintenance, with occasional inspections and cleanings to ensure they continue to perform at their best.
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Steps to Put a Steel Roof Over Shingles

Here’s a step-by-step guide to help you get started:

1. Roof Inspection and Preparation

  • Inspect the Existing Shingles: Before you begin, carefully inspect the existing shingles for any signs of damage or issues. Replace any damaged shingles or fix structural problems.
  • Clean the Roof: Remove debris, dirt, and moss from the existing shingles. A clean surface is essential for ensuring proper adhesion of the steel roofing.

2. Measure and Order Materials

  • Measure the Roof: Accurate measurements are crucial. Measure the dimensions of your roof to determine how much steel roofing material you’ll need.
  • Order Steel Roofing: Once you have the measurements, order the steel roofing panels, trim, and necessary accessories from a reputable supplier.

3. Install Roof Underlayment

  • Lay Down Roof Underlayment: Install a high-quality roofing underlayment over the existing shingles. This provides an additional layer of protection against moisture and ensures a smooth surface for the steel panels.
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4. Install Roofing Panels

  • Begin Installation: Start at the lowest edge of the roof and work your way up. Follow the manufacturer’s instructions for panel installation, including overlap and fastening guidelines.
  • Secure the Panels: Use roofing screws with rubber gaskets to secure the steel panels to the roof deck. Pay close attention to fastener spacing to ensure stability.

5. Install Trim and Flashing

  • Install Trim: Use metal trim pieces, such as eave trim and ridge cap, to finish the edges and corners of the roof.
  • Flashing Installation: Properly install flashing around roof penetrations, such as vents and chimneys, to prevent leaks.

6. Inspect and Maintain

  • Roof Inspection: After installation, inspect the entire roof for any loose fasteners, gaps, or areas that may need attention.
  • Regular Maintenance: While steel roofs are low-maintenance, occasional cleaning and inspections are recommended to ensure they continue to perform well.


Putting a steel roof over shingles is a viable option for homeowners looking to enhance their roofing’s durability, longevity, and energy efficiency. By following the steps outlined in this guide, you can successfully complete the installation process. Always adhere to safety precautions and, if necessary, seek professional assistance to ensure a smooth and efficient roofing project. With a steel roof in place, you’ll enjoy the benefits of a robust and resilient roofing solution that can protect your home for decades to come.

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