Metal Roof
Metal Roof
When most homeowners begin thinking about a metal roof, they usually envision roofs they have seen on 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 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. Classic’s ClickLock Standing Seam provides the look of the products that you see everywhere on restaurants and farm outbuildings.
Through Fastened Standing Seam
Also called “exposed fastener”, these are sheets of corrugated metal that laid on the roof, with screws are driven through them to secure them to the roof deck. These panels have no built-in allowance for the metal’s movement with temperature change. As a result, the fasteners bear the forces of thermal movement. This causes fastener holes to wallow out and fasteners to back out or even break over time.
Nail Hem Standing Seam
These panels have a nailing strip running down one side, usually with elongated holes designed to allow for the expansion and contraction of the roof panels. If the fasteners are over-driven or if the fasteners are not all located exactly in the middle of the slotted hole, the allowance for expansion is ruined. This causes ripples to appear in the panels. Many of these products also have lower quality coatings.
ClickLock – Concealed Fastener Standing Seam
These panels are designed with clip fasteners that allow the metal roofing panels to float as needed with the naturally occurring expansion and contraction of the metal caused by temperature changes. Additionally, standing seam panels and their accessories are designed to have only concealed fasteners. The highest quality standing seam systems will have PVDF coatings noted for their fade and chalk resistance.
