With benefits ranging from longevity to lower energy costs, it’s no wonder more and more homes and businesses are turning to metal roofing. Just like with the more traditional asphalt shingles, a metal roof can enhance both the form and function of your exterior.
If you already have shingles, you may be wondering if a metal roof-over will work for your home or business. While you can install a metal roof directly over shingles, there are a few things to consider before you have one installed over your existing structure.
Benefits of Installing a Metal Roof Over Shingles
Instead of having to remove all of the existing shingles, a metal roof-over can eliminate this fairly involved process. It also provides homeowners and business owners with all kinds of benefits, including:
- Cost savings: Since metal roofs are installed directly over asphalt shingles, homeowners and business owners will be able to save on labor and disposal costs.
- Time efficiency: Because existing shingles don’t need to be removed prior to installation, the entire installation process will be much faster. You’ll have a brand-new roof that is built to last in less time.
- Environmental impact: While other types of roofs and materials will get sent straight to a landfill, metal roofs are fully recyclable, making them a much greener alternative. Because metal roofs are also capable of reflecting solar energy, they will help reflect sunlight and reduce heat absorption, lowering energy costs.
Considerations Before Installing a Metal Roof Over Shingles
As with every other renovation project, there are pros and cons of installing a metal roof over shingles. It’s important to note a couple of key points before you get started:
- Local building codes and regulations: Depending on where you live, you may need to follow local building codes and regulations to ensure everyone on the job site stays safe and in compliance. For example, some areas only permit a re-roof over one layer of shingles, while other areas will allow two layers.
- Condition of existing shingles: While skipping demolition and removing all of the existing shingles can help cut costs, if the existing roof is rotted or severely damaged, it can lead to bigger problems later on. The roof decking, or foundation of your roof, can’t be inspected after your new metal roof is installed. This is why it’s important to make sure all components and structures are safe and stable before starting.
- Weight concerns: Metal roofs are lighter than other roofing materials, but when added on top of existing shingles, the cumulative weight can exceed the design limits of the structure. Ensure there’s enough structural integrity to handle this additional weight. This is especially crucial if the decking ever begins to rot or become severely damaged. You need to know that the weight won’t cause structural issues later on.
- Manufacturer’s warranty: Carefully read through your manufacturer’s warranty to ensure that installing a metal roof over it will not void it. Some warranties may not permit this because it will be harder to make repairs or replacements to your existing shingles once a metal roof is installed.
Metal Roof Preparation Steps
Prior to metal roofing installation, there are a few things you can do to ensure the process runs smoothly and the new roof will be stable and secure:
- Inspection of existing roof: Before installation, the existing roofing and shingles need to be thoroughly inspected to ensure there’s no existing damage and that they’re suitable for overlay. If any shingles are damaged or starting to deteriorate, it’s important to either repair or replace them before installing the metal roof.
- Underlayment installation: The underlayment is an important element of any roofing installation. The shingles can function somewhat as an underlayment, but any changes, like contraction or expansion, can cause damage. Adding an underlayment between the shingles and metal roofing will add a layer of protection.
- Furring strips/batten installation: Once the underlayment has been installed, furring strips and batten installation can then be added. This will create a flat surface for the roof and improve ventilation. When there’s enough airflow, you won’t have to worry about moisture building up and damaging the roof.
Metal Roof Overlay Installation Process
Once the existing roof has been properly inspected and prepared, the new metal roof can be installed right over the existing shingles. The installation process typically involves a simple, streamlined process:
- Measure and plan.
- Install underlayment.
- Attach furring strips and battens.
- Lay down metal panels or shingles.
- Secure edges and flashing.
Common Myths About Metal Roof Over Shingles
Because metal roofs are not as common as asphalt shingles, there are still some common myths surrounding them, ranging from increased noise levels to lighting attraction. Whether installed on a home or business, metal roofs offer exceptional durability that will keep the structure secure in all kinds of weather conditions. Even during harsh weather like thunderstorms, you can experience peace of mind knowing that quality metal roofs can prevent lightning strikes and are fireproof.
Metal roofing serves as a sound dampener, especially when installed directly over asphalt shingles. When properly installed, you won’t notice that much of a difference with the new roof.
With proper care, metal roofs have a long life span, lasting for several decades with minimal maintenance. Rain will easily drain off, preventing it from pooling up on the surface or causing rust. You can feel confident knowing that no matter what kind of weather conditions your home or business faces, your roof will be able to withstand it.
Discover Roofing as Durable as It Is Beautiful
If you’re interested in installing a metal roof without removing the shingles, Modern Metal Roofing can help you take the next step. As an industry-leading metal roofing company, we rely on American-made steel and aluminum. Our durable roofing styles add both beauty and value to your home and business.
All of our roofing products are Florida-approved and can be installed directly over shingles. We also offer several personalization options to bring your exterior vision to life. While proper preparation and consideration are crucial when it comes to a metal roof-over, our team has the experience needed to make our designer metal roofing uniquely yours.
To learn more, we invite you to reach out today for professional advice or a consultation.
