White colonial house with light gray standing seam metal roofing

Benefits of Metal Roofing Installed Over Shingles


Installing metal roofing over shingles can save on labor and disposal costs associated with removing the old roof, making it a more budget-friendly option.


It’s also a quicker installation process compared to removing shingles, preparing the roof deck, and then installing the metal roofing.

Added Insulation

Additionally, the extra layer provided by the existing shingles can offer some additional insulation, contributing to better energy efficiency.


Furthermore, when properly installed with appropriate underlayment, metal roofing acts as an additional protective layer, enhancing waterproofing.

Things to Consider When Installing Metal Roofing Over Shingles


Adding another layer of roofing can increase the weight on the structure. Consequently, it is important to ensure that the structure can support the combined weight of the new metal roof and the existing shingles. Typically, contractors install Tuff-Rib over shingles due to their lighter weight.

Surface Preparation

The existing shingles must be in good condition without any significant damage or irregularities. Thus, proper preparation of the surface is crucial to ensure a smooth and even installation.

Ventilation and Condensation

Adequate ventilation between the old shingles and new metal roofing is essential to prevent moisture buildup and potential condensation issues.

Warranty Concerns

Always check with the manufacturer or installer regarding warranty specifications. Some warranties might be affected if the metal roofing is installed over an existing layer of shingles.

Installation Process


First, perform an inspection of the existing roof, ensuring it’s suitable for the new installation. Choose a qualified and licensed roofing contractor so no existing damage is overlooked.


Next, complete any necessary repairs to the existing roof, such as fixing damaged shingles or addressing structural issues.


After repairs are completed, install a protective underlayment, such as felt or synthetic material, over the shingles to serve as a moisture barrier and protect against potential abrasion. JD Metals offers an array of underlayment and insulation products.

Metal Roof Installation

Next, install metal panels or sheets over the prepared surface using appropriate fastening methods and techniques.

Trimming and Finishing

Finally, trim the edges and any necessary areas, and add finishing touches, ensuring a neat and professional appearance.

Before installing metal over shingles, it’s essential to consult with a professional roofing contractor to evaluate whether this method is suitable for your specific roof and to ensure proper installation for long-term durability and performance.

Our team here at JD Metals has the materials and resources you need for any metal roofing project. Contact us today!