You might be surprised how often we get asked about whether or not a metal roof will attract lightning. In this blog, the residential roofers at JTI Roofing debunk common myths about metal roofs and the elements.
“Metal Roofs Attract Lightning”
This myth probably stemmed from the fact that metal is an electrical conductor. But the truth is, it is the tallest grounded in the vicinity that attracts lightning. It could be a tree, a cell tower, or a lightning rod. Also, a standard metal roof is installed on non-conductive framing materials such as wood. In case a lightning storm is happening in your area, all you need to do is stay indoors.
“Metal Roofs Are Noisy”
Sheds made with sheet metal are indeed noisy when it rains. Many people assume that the same is true with residential metal roofs, but sheds and roofs are built differently. Residential metal roofing systems are very similar to asphalt shingle roofing systems. In fact, standard standing seam metal roofing is a common roof replacement option for existing asphalt shingle roofs. With components such as decking and insulation, a metal roof is no noisier than other roofing systems.
“Metal Roofs Are Easily Dented”
Homeowners who live in areas prone to hail storms fear that metal roofs are easily dented. Whereas that is true with old corrugated sheet metal (which is no longer used for residential roofing), today’s metal roofs are made to comply with durability standards that include denting caused by hail. It would take an unusually large hailstone to make a minor dent on a metal roof.
“Metal Roofs Remain Hot During Summer”
Metal holds and conducts heat, this is true. But as a roofing material, it doesn’t remain hot for as long as others. In fact, metal has high heat emissivity, which means it releases stored heat faster. This results in fewer indoor cooling requirements at night. Combined with reflective coatings, a metal roof can actually help you save on your utility bills during the summer season.