meta roof over shingles

Can You Put a Metal Roof Over Shingles?

The question on many homeowners’ minds is: Can you place a metal roof over existing shingle roofing? The short answer is yes, but let’s dive into the hows and whys, ensuring you make an informed decision for your Miami home.

Advantages of Metal Roofs

Here are few advantages of metal roofs in Miami:

  • Longevity and Durability: Metal roofs are renowned for their long lifespan, typically lasting 40-70 years, depending on the material. Compared to traditional asphalt shingles, which usually have a life expectancy of 15-30 years, metal roofing is a winner in longevity.
  • Maintenance: Metal roofs require very minimal maintenance over their lifetime, especially when compared to other roofing materials. They are less likely to suffer from cracking, eroding, or other common roofing issues.
  • Safety: Metal roofs are incredibly resilient and can protect a home against extreme weather conditions. They will not spark and ignite into flames during a wildfire or lightning strike.
  • Energy Efficiency: Metal roofs reflect solar radiant heat, which can reduce cooling costs by 10-25%. In Miami’s hot climate, this reflective quality can lead to significant energy savings.
  • Eco-Friendliness: Metal roofing materials are often made from recycled content and are 100% recyclable at the end of their life. Choosing metal roofing in Miami is a sustainable choice for the environment.

Advantages of Metal Roofs Over Shingles

Here are some advantages of metal roofs over shingle roofing:

  • Weight: Metal roofing materials are typically lighter than asphalt shingles, which can reduce the stress on your home’s structure.
  • Installation Flexibility: Metal roofs can often be installed over existing shingles, subject to local building codes, which can save time and disposal costs.
  • Weather Resistance: Metal roofs excel over shingles in their resistance to harsh weather conditions, including heavy rain, hail, and strong winds that are common in Florida.
  • Insurance: In some cases, having a metal roof can lower homeowners’ insurance premiums due to their durability and fire resistance.
  • Resale Value: Homes with metal roofs can have a higher resale value due to their longevity and low maintenance needs.
  • Roof Pitch: Metal roofing can be installed on homes with a very low to steep pitch, providing versatility that shingles can’t always match.

metal roof over shingles roof

Table: Metal vs. Shingle Roofing

Aspect Metal Roofing Shingle Roofing
Durability Up to 50 years 15-30 years
Cost Higher initial, less maintenance Lower initial, more maintenance
Installation Can be over shingles Requires clean deck
Energy Efficiency Higher Lower

Disadvantages Of Metal Roofs

While metal roofs offer numerous benefits, they do come with drawbacks. Initial installation costs are higher compared to traditional shingle roofs, which can be a deterrent for some homeowners. Metal roofs can also be noisier during rainstorms or hail without proper insulation. Additionally, in the event of a repair, color matching existing panels can be challenging due to natural weathering or product discontinuation. Lastly, if installed incorrectly, metal roofs are prone to expansion and contraction, leading to loosening of the panels, which emphasizes the need for skilled installation like that provided by Hasid On The Roof Florida.

Installation Of Metal Roofing Over Shingles

Installing a metal roof over shingles is a feasible project that offers a streamlined renovation option:

  • Inspection: Begin with a thorough inspection of the existing shingle roof to ensure it’s structurally sound.
  • Preparation: Install a layer of roofing underlayment over the shingles for moisture protection.
  • Furring Strips: Secure furring strips horizontally across the shingles to create an even, ventilated surface.
  • Metal Panels: Fasten metal roofing panels onto the furring strips, ensuring proper alignment and secure attachment.
  • Sealing: Seal all joints and edges to prevent leaks, using high-quality sealants designed for metal roofing.

Professional installation is recommended to ensure longevity and performance.

Manufacturer Specifications And Warranty

When installing a metal roof over shingles, adhering to manufacturer specifications is crucial:

  • Warranty Compliance: Ensure that the method of installation is approved to maintain the manufacturer’s warranty.
  • Specifics: Follow the manufacturer’s guidelines for fastening methods, materials, and minimum roof pitch.
  • Ventilation: Meet the specified ventilation requirements to prevent voiding the warranty.
  • Underlayment: Use the recommended underlayment for optimal performance.
  • Layers: Check the maximum number of shingle layers allowed; typically, installation over one layer is preferred.
  • Inspection: Professional inspection post-installation may be required to activate the warranty.

Following these points helps preserve the integrity of the roof and warranty protection.

Metal Roof Over Shingles Condensation

When installing metal roofing over shingles, condensation is a consideration:

  • Ventilation: Ensure proper ventilation to prevent condensation, which can damage underlying materials.
  • Insulation: Use quality insulation under metal roofing to minimize temperature differentials that cause moisture buildup.
  • Barrier: Install a vapor barrier between the shingles and metal roof to protect against condensation-related issues.

Properly addressing condensation is key to maintaining the roof’s integrity and preventing any moisture-related problems.


Can I Install Metal Roofing Directly Over Shingles?

Yes, you can install metal roofing over shingles, provided the roof structure is sound and local building codes permit it.

Is It Necessary To Remove Old Shingles Before Installing A Metal Roof?

Removing old shingles is not always necessary; metal roofing can be installed over them if the existing roof is in good condition.

Do I Need To Put Underlayment For A Metal Roof Over Shingles?

While not always required, an underlayment is recommended for additional protection against condensation and leaks.

What Is The Lifespan Of A Metal Roof Installed Over Shingles?

A metal roof over shingles can last 40-70 years, depending on the quality of the installation and materials used.

Why Should You Choose Hasid On The Roof Florida?

At Hasid On The Roof Florida, we are the metal roofing maestros of Miami. With years of experience, we understand the local climate and housing needs. We ensure a seamless transition from shingles to metal, prioritizing your home’s integrity and your satisfaction. When comparing metal roofs to shingles, the advantages are clear, especially in longevity, durability, and overall performance. With Hasid On The Roof Florida, you’ll not only receive a roof that offers superior benefits but also the assurance that it’s installed with expertise and care, tailored to the Miami weather conditions.