10/21/2026
Can metal roofing be installed over your old roof?
In many cases, you can install metal roofing over an existing asphalt or fiberglass roof. Installing over an existing roof can help reduce labor costs and project time by avoiding tear-off and disposal of the old material. Metal roofing weighs less than 1.6 pounds per square foot, depending on the gauge.
A roofing professional should evaluate the existing substructure to confirm it can support the added weight of the metal roof components and recommend appropriate surface preparation or underlayment.
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