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Installing a Metal Roof Over Shingles: What You Should Know

At Steadfast Roofing, we understand the importance of making informed decisions about your roofing projects. Steadfast Roofing, located in Ruskin, FL, is here to guide you through the process of installing a metal roof over your existing shingles.

Benefits of Installing a Metal Roof Over Shingles

Longevity

Metal roofs can last between 40 to 70 years, significantly outlasting the 20 to 30-year lifespan of asphalt shingles. This extended durability makes metal roofing a valuable long-term investment, potentially saving you money on future replacements. Additionally, metal roofs are often more resistant to harsh weather conditions, which can further contribute to their longevity and cost-effectiveness.

Durability

Metal roofs are exceptionally durable, capable of withstanding extreme weather conditions such as hail, high winds, and heavy snowfall. This durability ensures that your roof remains intact and protects your home for many years.

Energy Efficiency

Metal roofs are heat-reflective, which can significantly reduce cooling costs during the hot summer months. This energy efficiency can lead to lower utility bills and a more comfortable living environment.

Environmental Friendliness

Often made from recycled materials, metal roofs are environmentally friendly. At the end of their lifespan, they can be completely recycled, unlike asphalt shingles which typically end up in landfills.

Cost Savings

Installing a metal roof over existing shingles can save on labor costs and waste disposal fees. This method eliminates the need to tear off the old roof, reducing the overall cost of the roofing project.

Low Maintenance

Metal roofs require minimal maintenance as they do not rot, warp, or crack. They are also resistant to mold and mildew, making them easier to care for compared to traditional roofing materials.

Pre-Installation Checks

Before proceeding with the installation of a metal roof over shingles, it is essential to perform the following checks:

  1. Local Building Codes: Verify with your local building department whether installing a metal roof over shingles is permissible.
  2. Roof Condition: Inspect the existing shingle roof for leaks, rot, or other damages that need addressing.
  3. Roof Slope: Ensure your roof has an adequate slope (at least 3:12 pitch) for proper water drainage.
  4. Ventilation: Confirm that your attic has proper ventilation to prevent moisture buildup.
  5. Structural Integrity: Assess if your home’s structure can support the additional weight of a metal roof over shingles.

Installation Methods

Direct Installation

This method involves attaching metal roofing panels directly through the shingles and into the wood deck below. It is cost-effective but may not provide the flattest surface for metal roofing.

Using Furring Strips

Furring strips can be installed over the shingles to create a flat and even surface for the metal roofing panels. This method also allows for better ventilation.

Shingle Recover Systems

These systems enable metal roofing installation over shingles without a complete tear-off or additional framing. They provide extra insulation and ventilation.

Potential Problems and Solutions

Moisture Buildup

To prevent moisture buildup between the metal roof and shingles, install a proper ventilation system or use a synthetic underlayment.

Uneven Surfaces

Address uneven shingle surfaces by using furring strips or leveling the surface before installation.

Increased Roof Weight

Consult with a professional to ensure your home can support the additional weight of a metal roof over shingles.

Old Roof Issues

Ensure that any existing issues with the shingle roof are resolved before installing the metal roof.

Conclusion

Installing a metal roof over shingles is a viable option that offers numerous benefits, including longevity, durability, energy efficiency, and cost savings. Steadfast Roofing is dedicated to providing top-quality roofing services and ensuring that your roof stands the test of time.

 For more information on the key components of your roof, click here.

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