HOW TO PREVENT AND REPAIR OIL CANNING OF METAL ROOF PANELS
The standard industry disclaimer says this about oil canning: “Oil canning can be defined as a perceived waviness in the flat areas of [metal] panels. Oil canning is an inherent characteristic of light-gauge, cold-formed metal products with broad, flat areas. It is not grounds for panel rejection.” Wiktionary.org has a slightly different definition: “Moderate deformation or buckling of sheet material, particularly common with flat sheet metal surfaces. It is typically caused by uneven stresses at the fastening points.” Why do steel roofing panels do that? There are several causes, some of which you can influence as a roofing contractor, and others that originate at the mill or panel fabricator. While oil canning typically causes no structural integrity issue with the panel, many owners are not pleased with the appearance. Let’s look at some ways to prevent or reduce oil-canning as well as ways to repair or mitigate its appearance. ARE YOU READY FOR A NEW METAL ROOF? DOWNLOAD OUR FREE G...