Seam type that consists of an unturned rib that may also be structural, with a watertight seam. It is made by turning up the edges of two adjacent metal panels (cladding or siding) and then folding them over in one of a variety of ways.
Seam type that consists of an unturned rib that may also be structural, with a watertight seam. It is made by turning up the edges of two adjacent metal panels (cladding or siding) and then folding them over in one of a variety of ways.