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All those watching the Super Bowl this weekend, take heart: there’s a good chance the Minneapolis stadium roof won’t collapse — as its predecessor the Metrodome’s did in December 2010.
That’s because U.S. Bank Stadium, which opened in 2016, features a sleek, practical roof made of a material that lets the snow fall off the roof into a gigantic snow gutter. This transparent material, Ethylene Tetrafluoroethyl (ETFE), also saves energy. It allows natural sunlight into the stadium, giving the venue a natural, outdoorsy feel, while also allowing solar thermal heating that redistributes warm air in the winter and pumps cold air in the summer.