When most homeowners begin thinking about a metal roof, it’s easy for one to think of pole sheds, barns and commercial buildings. Those types of metal roofs typically have panels that run vertically up the roof. These types of metal panel roofs are called “standing seam,” because their prominent visual feature. That feature is the raised interlocking seam which joins one panel to the next. Often called “commercial roofing,” or “agricultural panel roofing,” or even “barn roofing,” these products do provide the great protection and durability for which metal is known. There are two different methods in which standing seams paneling from All American is installed.
Standing Seam Concealed Fastener
Standing seam roofing use a “concealed fastener” panel. Those panels are joined together by integral locking seams and are fastened to the deck with fasteners and/or clips that are hidden underneath the roofing panels. The Lexington and Concord are two concealed fastened panels.
The term “standing seam” often is used as a generic description for a class of metal roof seams. “Standing seam” is derived from the fact that the seams are joined together above the panel flats. What this does is highly reduces the chance that any standing or running water come in contact with the seam, doing its job in the meantime, keeping water out of the structure. Additionally, the term is also used to refer to a panel profile of the standing seam.
How are the seams joined together, to form that standing seam, you may ask? There are several different methods in which the panels are joined together at the seam. All American uses two styles, including the concealed fastener “Lexington,” whereas there is a direct screw line of fasteners on one side of the panel, to secure the panel to the roof. On the other edge of the panel, a locking “snap fold” joins the two together. The second style, used on the “Concord” paneling, is the “clip concealed” fastener system.
Standing Seam Exposed Fastener
On the contrary, the other way to install a metal roof, is by using “Exposed Fastener panels,” which is the most economical option. Typically installed over solid decking, (or existing shingle and furring strips for re-roof applications) the panels are attached with fasteners that penetrate through the metal panel into the structure below. Fasteners are available painted in the same color as the panel to make them blend in with the panels visually. More on that to be discussed some other time. Thanks for reading!