Reroofing is the practice of installing a new roof—from felts to shingles—over the old one, usually with the intent of saving on installation time, as well as tear-off and disposal costs. While this practice is discouraged by asphalt shingle manufacturers, it’s a different case when a metal roof is intended for installation. In this blog, roofing contractor Cantrell Roofing, LLC shares a look at reroofing with a metal roof.
Why Is Reroofing Considered a Bad Idea?
Since reroofing involves installing a new roof over an existing one, it skips a few critical steps, such as performing structural repairs. Hidden issues such as water damage on the roof deck won’t get repaired, and could get worse while remaining unseen. Reroofing also doubles the weight of the roof, which can be a problem if the structural components aren’t built to support such weight. The amount of fasteners on the roof will also be double, which can negatively affect roofing integrity.
Reroofing With Metal
Reroofing with an asphalt shingle roof poses the risk of premature roofing failure. However, it’s a different case with metal roofing. A standard standing-seam metal roof weighs merely a fraction of a standard three-tab shingle roof, which eliminates the need to reinforce the roof structure. Metal roofing also works in any roof pitch, even on flat roofing systems. The existing outer roofing layer can also bolster the layer of insulation that goes between the outer metal layer.
Work With a Knowledgeable Contractor
When reroofing with a metal roof, you have to be doubly sure that you have the right contractor for the project. The contractor will be responsible for assessing the roof’s condition, and making sure that you have a sound roofing structure that’s suitable for installation. Contractors who know the right components to use—long fasteners, for instance—can help ensure that your new metal roof will perform just as well, if not better, than standard roofs.