#38 – Overlapping Metal Roofing Panels vs. Interlocking Metal Roofing Panels
There are metal roofing panels that simply overlap on the vertical and/or horizontal seams, and metal roofing panels that actually interlock wherever they connect. There are obvious benefits to fully interlocking panels. Those benefits typically include increased wind resistance and less chance of weather infiltrating the roof system. Over time, with overlapping panels, ice, snow, and debris from trees can work its way between the overlapped panels, forcing the overlap open. This just invites more debris and leads to compromise of the roof system. Overlapping metal roof panels also often have exposed fasteners and those can be points of entry for rain water as well.
Todd Miller has spent his entire career in the metal building products manufacturing industry. He is president of Isaiah Industries, an organization recognized as one of the world’s leading metal roofing manufacturers. Todd is currently Vice President of the MRA (Metal Roofing Association) and a Past Chair of MCA (Metal Construction Association). Through his website, he strives to raise the bar on standards and practices to provide property owners with the best possible products for successful roofing projects.
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