Have you ever seen a shed or building with a buck led or wrinkly/wavy appearance on the wall panels or roofing? That’s Oil Canning!! This effect happens when light-gauge, large cold-rolled flat metal is under thermal stress. At Oz-Cover, we prefer to use high quality materials such as .42 Trimdek® and/or .42 Custom Orb®. Although this product may be a bit dearer, we know that it is important to have an aesthetically appealing shed for years to come, which will add value to your property. We hope this helps you make an informed decision when choosing the materials and look you desire and a contractor you can trust.