Common Issues with Metal Roofing

Metal roofing is enjoying a meteoric rise in popularity, particularly here in the south. Prefabricated metal roofing has a specific aesthetic appeal, and it’s an ideal choice for houses built (or novated) in the “modern farmhouse” style.Compared to traditional asphalt shingled roofing, metal roofs are significantly more expensive. A lot of people think it’s worth it, however, for the longer lifespan and reduced maintenance that come part-and-parcel with these kinds of roofs. Metal roofs are also much lighter, fire resistant, eco-friendly, and relatively quick to install.

Here at Accent Roofing, we work with all kinds of Georgia roofs. In case you’re considering metal, here are a few of the most common issues we see with metal roofs.

Denting
Denting can be a problem for metal roofs. We always advise our customers to strongly consider “dent-proof” metals, and also to remember that some metals – like steel – are stronger than others – like aluminum. Metal roofs can be dented in a variety of ways, especially during one of our strong hail storms or when being walked on by an inexperienced roofer. In most cases, dents are purely aesthetic problems but in situations where the dent is particularly deep, an issue with water runoff may develop.

Oil Canning
Also known as “stress wrinkling” or “elastic buckling,” oil canning is when the flat parts of a metal roof begin to appear wavy and even buckle in places. It is very common and is typically a byproduct of the actual metal itself, not (necessarily) the installation process. Once metal roofs begin to oil can, the affected panels must be replaced to solve the issue. Ways to prevent canning include using a thicker metal sheeting, choosing a “stretched” metal, and having the roof installed over a totally flat decking.

Leaking
Leaks are the number one problem for almost any roof, and metal is no exception. Metal roofs tend to leak most at their fastener points but proper installation can help. A number of factors can make leaks more likely on a metal roof including driving rain, heavy wind, structural damage, and even back-to-back ice events. When installing a metal roof the flashing, seams, and fasteners are the most important areas to pay attention to for preventing leaks.

Scratching
Almost all modern metal roofs have some type of coating. In many cases, the coating also doubles as a paint, and paint scratches. Scuffing and scratching are common complaints from metal roof owners and they can happen at any point during a roof’s lifecycle. A heavy-handed roofer, a falling tree branch, and even particularly aggressive pinecones can take their toll! It’s important to choose a roofing material that has a strong, durable coating applied and to perform regular maintenance inspections.

Corrosion
Metal rusts! It’s just what happens when metal is exposed to moisture. Corrosion isn’t just unsightly, it actually weakens the structural integrity of the metal. Underside corrosion is particularly common and occurs when the roof’s panels haven’t been properly coated. If metal roofing panels are properly coated, corrosion is usually only a concern at the attachment points like the fasteners. Unfortunately, corrosion is something that can’t be avoided when it comes to metal roofs but how many years it takes, from 20-60+, depends on how well the roof is installed and maintained.

Considering having a metal roof installed? Reach out to the experienced team at Accent Roofing! We’ve installed thousands of roofs in metro Atlanta and we’re more than familiar with the common benefits and drawbacks of every modern roofing material.

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Source: Roofing Maintenance