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By Glendale Roof Contractor · August 28, 2026

A Complete Guide to Installing Metal Roofing Over Shingles for Glendale Homeowners

As a homeowner in Glendale, CA, you may be considering a roofing upgrade that will provide durability, energy efficiency, and a fresh aesthetic. Metal roofing has become increasingly popular due to its longevity and low maintenance requirements. If you're wondering how to install metal roofing over shingles, you're in the right place. This guide will walk you through the necessary steps, materials, and considerations for a successful installation.

Understanding the Benefits of Metal Roofing

Before diving into the installation process, it's essential to understand why metal roofing could be an excellent choice for your home. Metal roofs offer a range of benefits, including:

In Glendale, where our weather can go from sunny to rainy quickly, protecting your home is crucial. Metal roofing can provide that extra layer of safety and durability, making it a sound investment.

Preparing for Installation

Installing metal roofing over shingles involves careful preparation. First, you'll want to assess your current roofing condition. Make sure there are no significant damages or leaks in the existing shingles. A professional roof inspection can be invaluable at this stage. They will help identify any underlying issues that may need addressing before you begin the installation.

Next, gather the required materials:

Be sure to check local building codes to ensure compliance. In Glendale, various regulations may apply regarding roofing materials and installation methods, so it's wise to consult with local authorities or a professional.

Removing Unwanted Elements

While you're installing metal roofing over shingles, you don't need to remove the existing shingle roof. However, you should remove any protruding elements like vents or flashing that may not be compatible with the new roofing system. This will ensure that the metal roofing fits snugly and securely.

Take care of any additional preparation such as:

Once the area is prepped, you’ll be ready to move forward with the installation.

Installing the Underlayment

The next step is to apply an underlayment. This layer will provide additional weather protection and insulation, making it a crucial part of the installation process. Start by rolling out the underlayment horizontally along the roof’s length, ensuring it overlaps the existing shingles.

Make sure to secure the underlayment with roofing nails, placing them about every 12 inches. This will prevent wind uplift and ensure the underlayment stays in place, providing a durable foundation for your metal roofing panels.

Applying Metal Roofing Panels

Now comes the fun part - installing the metal roofing panels. Start at the bottom edge of your roof and work your way up, laying each panel in the same direction as your existing shingles. Metal panels typically come with interlocking features that secure them together while minimizing leaks.

As you install each panel, make sure they are properly aligned and fastened securely using roofing screws. The screws should penetrate both the metal and the underlayment to provide adequate support. It's a good idea to stagger the seams of the panels for added stability.

If your home has any valleys or intricate features, be sure to use flashing to divert water away from these critical areas. This will help prevent leaks and prolong the life of your new metal roof.

Finishing Touches

Once all the panels are installed, you can add the necessary flashing and trims around any roof protrusions, such as chimneys and vents. Don’t forget to inspect the edges and seams to ensure everything is sealed and secure.

Finally, you’ll want to install gutters if you haven't already. Proper gutter installation will aid in directing rainwater away from your home, protecting your foundation and landscaping. For this, consider our Gutter Installation service to ensure the job is done correctly.

Safety Precautions

Safety should always be your top priority during any roofing project. Make sure to wear appropriate safety gear, including harnesses and non-slip footwear. If your roof has a steep pitch, consider hiring professionals to handle the installation to avoid the risks associated with working at heights.

Additionally, be aware of your surroundings. Ensure that any tools or materials are stored safely and that the work area is clear to prevent accidents.

When to Call in the Pros

While installing metal roofing over shingles can be a rewarding DIY project, it may not be suitable for everyone. If you encounter significant damage during your inspection, or if your roof's pitch is particularly steep, it might be best to call in the experts. A reliable roofing contractor can handle the installation efficiently while ensuring all safety measures are followed.

Additionally, if you're not comfortable with any step of the process, seeking help will save you time and potential frustrations. Consider contacting Glendale Roof Contractor for Glendale roof repair or installation services to ensure the job is done correctly.

When you are ready for hands-on help, you can also explore Glendale roof repair.

When you are ready for hands-on help, you can also explore professional roof inspection.

In conclusion, installing metal roofing over shingles is an excellent way to enhance your home’s protection and curb appeal. By following these steps, you can tackle the project confidently, ensuring your home stands strong against the elements. If you’re ready to make the leap into metal roofing or need assistance, give Glendale Roof Contractor a call at 747-209-1739. We're here to help with all your roofing needs!

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