During the manufacturing process, the metal coil is subjected to high tension and flattened. Because the seams are mechanically locked, the flat area between them has nowhere to go but to buckle slightly, creating the visible ripple.
Design Solutions for Oil Canning in Metal Roofs
Installation practices also play a significant role; if the panels are over-tightened on the fasteners, there is no adequate allowance for movement, forcing the metal to distort. However, for aesthetic-sensitive applications, it is a factor that should be discussed upfront to manage expectations.
Additionally, the thickness of the gauge—thinner sheets are more susceptible than thicker ones—dictates the likelihood and visibility of the effect. What Exactly is Oil Canning? Oil canning refers to the visible distortion that appears as waves or ripples in the flat areas of metal roofing panels.
Design Solutions for Oil Canning Metal Roof
While often mistaken for a defect, oil canning is typically a characteristic behavior of thin-gauge sheet metal rather than a sign of structural failure. The Physics Behind the Waviness The core reason oil canning occurs relates to the natural tendency of thin metal to relieve internal stresses.
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