Shoptalk—deciphering architectural and historic preservation jargon one word at a time!
swept standing seam
used to finish a standing seam in sheet metal as the seam turns up a wall surface or to transition from one wall plane to another through an acute angle
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Standing seam sheet metal has a long history of use as a roofing and wall cladding. Most commonly this cladding is applied over broad expanses with consistent slopes or over convex or concave curvatures. At inside corners, such as where a sloped surface meets a vertical surface, the seam can be swept or stood up. This is done by introducing a fold or pleat into the upturned edge at the change in direction. The extra thickness of metal at such locations requires hand work to turn the seam. This technique of sweeping the seam can be used to turn the standing seam up the wall and continue it, or it may be used to cleanly finish the panel at a reglet or other termination. It can also be used to sweep the seam into a soffit of overhang.
A sweep can be used to transition from standing seam to vertical upstand. (Source: Copper Roofing: A Practical Handbook, Copper Development Association, CDA Publication No. 57, 1959/1961)
seam wall cladding with swept inside corners being installed above a the dome gutter at the Kansas Statehouse.
Standing seam cladding at the base and top of the Kansas Statehouse dome utilized swept standing seams.