What is Oil Canning?
Oil-canning is a naturally occurring process and typically isn't something to be concerned about from a performance standpoint. That said, it can be unsightly from an aesthetic standpoint so it's something metal roofing and siding consumers should be aware of so they can take steps to mitigate this effect.
Oil canning is a rippled or wavy distortion that affects cold-rolled metal products like metal roofing and siding. The effect is typically most visible in broad, flat areas of the material. Again, this a natural oc