STANDING SEAM VERSUS EXPOSED FASTENER
Standing seam hides its fasteners under the seam, so there are no exposed gaskets to dry out. It handles thermal movement well and is the right system for a house you intend to keep. Exposed-fastener panels cost less and go up faster, which makes them the practical choice for barns, shops, and outbuildings — with the understanding that fasteners need attention every several years.
