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Metal Roof Over Shingles


Are you considering a metal roof over shingles? It’s a common question that many house owners ponder when it’s time to replace or upgrade their roof. While metal roofs offer several benefits, there can be some challenges when installing them over existing shingles.

In this blog post, we will explore the potential problems and considerations you should keep in mind before making this decision.


Understanding Metal Roofing

Before we dive into the specific challenges of installing a metal roof over shingles, let’s look at the benefits of metal roofing. Metal roofs are known for their durability, longevity and energy efficiency. They can also enhance the aesthetic appeal of your home and increase its resale value.

However, like any other roofing materials, metal roofs have their own unique considerations.

Metal Roof Over Shingles

Considerations for Installing a Metal Roof Over Shingles.

There are a few important factors to consider if you’re contemplating installing a metal roof over existing shingles. Let’s dive into them in details:

 Roof Structure and Weight

One of the primary concerns of installing a metal roof over shingles is the added weight. Metal roofs, especially those made of heavier materials such as steel or copper, can be significantly heavier than asphalt shingle roofs.

It’s crucial to ensure that your roof structure can support the additional weight. Consulting with a professional roofer is highly recommended to assess the load-bearing capacity of your roof. Here, at roofingmayasliferestoration, we can help you with the professional guidance needed. Do contact us.

Surface Condition and Smoothness

It is essential to thoroughly inspect the metal roof before proceeding with installation. Old, damaged or uneven metal roof can create an uneven surface that can compromise the integrity of the roof. In some cases, it might be good to remove the old shingles to ensure smooth and even surface.

Moisture and Ventilation

Moisture is a common enemy for any roof. When installing roof over shingles, it’s important to address potential moisture issues. Trapped moisture can lead to rot, corrosion and the growth of mold and mildew.


Pros and Cons

Now that we’ve covered the considerations, let’s see the pros and cons of installing a metal roof over shingles.


-Cost Savings: Installing a metal roof over shingles can potentially save you money by avoiding the cost of shingle removal and disposal.

-Time Efficiency: Metal roof installations can be faster and more efficient when compared to a complete roof replacement.

-Enhanced Insulation: Metal roofs often provide better insulation, which can lead to energy savings and increased comfort.

-Eco-friendly: By reusing the existing shingles, you can reduce waste and make an environmentally conscious choice.


Added Weight: As mentioned earlier, the additional weight of the metal roof can pose structural challenges if the roof structure is not properly evaluated.

-Surface issue: Uneven or damaged shingles can affect the installation process and the longevity of the metal roof.

-Limited Warranty: Some metal roofing manufacturers may have restrictions or limitations on their warranty coverage when installed over existing shingles.


Installing a metal roof over shingles can be an attractive option for homeowners looking to upgrade their roof. However, it’s essential to carefully consider the structural integrity of your roof, the condition of the existing shingles and the potential for moisture-related issues.

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