Can You Put Metal Roofing Directly on Shingles? Exploring the Options

When it comes to re-roofing your home, metal roofing is a popular and durable choice. However, homeowners often wonder if they can install metal roofing directly over their existing shingles. In this article, we’ll explore the possibilities and considerations of putting metal roofing directly on shingles.

Understanding the Basics

Traditional Roofing vs. Metal Roofing

Traditional roofing materials, such as asphalt shingles, are designed to be installed on a roof deck or sheathing. They rely on an underlayment and flashing to provide a waterproof barrier. Metal roofing, on the other hand, is typically installed differently. It can be installed directly on the roof deck or over an existing roofing system.

Can You Put Metal Roofing Directly on Shingles?

The short answer is yes, you can often install metal roofing directly over shingles. However, several factors need to be considered:

1. Condition of the Existing Shingles: The condition of your existing shingles is crucial. If they are damaged, curled, or cupped, installing metal roofing over them may not provide a smooth, stable surface. It’s essential to evaluate whether the shingles are in good enough condition to support this roof.
2. Roof Deck Condition: The integrity of the roof deck beneath the shingles is also vital. If the deck is compromised due to water damage or rot, it should be repaired or replaced before installing metal roofing.
3. Local Building Codes: Check with your local building department to determine if they allow metal roofing to be installed. Some regions have specific requirements or restrictions regarding roofing materials and installation methods.
4. Weight Considerations: Adding a metal roof over existing shingles will increase the weight load on your roof. Ensure that your roof structure can support the additional weight. Consult with a structural engineer if necessary.

Benefits

1. Cost Savings: Installing metal roofing can save you money on labor and disposal costs. You won’t need to pay for the removal and disposal of the old shingles.
2. Time-Efficient: The installation process is generally faster when metal roofing is installed over shingles compared to a full tear-off.
3. Insulation: The layer of shingles can provide some additional insulation, which can be beneficial in terms of energy efficiency.

Considerations and Best Practices

When opting to install metal roofing over shingles, it’s essential to follow best practices:

1. Roof Inspection: Have a professional inspect your existing roof to assess its condition and ensure it’s suitable for a metal roof installation.
2. Roof Deck Preparation: Ensure that any damaged or deteriorated areas of the roof deck are repaired or replaced to provide a solid base for the metal roofing.
3. Underlayment: Install an appropriate underlayment over the shingles to create a moisture barrier and protect against condensation.
4. Ventilation: Proper attic ventilation is crucial to prevent moisture buildup. Ensure that your roof’s ventilation system is in good condition.
5. Consult with Professionals: It’s advisable to work with experienced roofing professionals who are familiar with metal roofing installation methods, especially when installing over existing shingles.

Conclusion: A Viable Option with Proper Preparation

While it is possible to put metal roofing directly on shingles, it’s essential to assess the condition of your existing roof and consult with professionals. Proper preparation, including a thorough inspection and any necessary repairs, will ensure a successful metal roofing installation. When done correctly, installing metal roofing over shingles can be a cost-effective and durable roofing solution for your home.