In Calgary AB, many homeowners place their confidence in the durability and protection of metal roofs. Both corrugated and standing seam metal roofs can provide 50-70 years of reliable roofing, extending up to a century with minimal maintenance and only acrylic elastomeric coating applications. On the other hand, it’s quite an expensive roofing material, but it is a worthwhile investment.

However, even the best-made roofing materials can turn brittle and weaken over time. Unfortunately, the excellent durability and exceptional quality of metal roofs make it difficult to spot some telltale signs that it’s suffering from irreversible damage. Furthermore, if you don’t have specialized equipment, such as those that dependable Calgary AB roofers use, it’s impossible to spot them before they get worse.

Furthermore, metal roofs aren’t without their particular problems. While most people point to clay tiles as mostly problematic without the help of professional roofing maintenance services, metal roofs have their particular need for maintenance. Truthfully, you can leave the roof without maintenance, but you can prolong its lifespan and capability by using these services and nipping their potential problems in the bud.

Sheffield Metals has a great post about the difficulties of using metal roofs. You can read more about them below.

#1: Oil Canning

According to the Metal Construction Association, oil canning is defined as:

“Visible waviness in the flat areas of metal roofing and metal wall panels. In technical terms, oil canning is referred to as elastic buckling (more commonly known as “stress wrinkling”). It can occur in any type of metal panel: steel, aluminum, zinc, or copper.”

To be clear, oil canning is an inherent characteristic of nearly all metal roofs/walls. Think of oil canning as the metal on a standing seam metal system being over-stressed and unable to hold a flat form, which causes the metal to give in and create visible waves. Oil canning is easily one of the hottest topics in metal roofing because it can be difficult to define and measure. There are a number of reasons that oil canning can occur, including:

  • Over-production—such as extreme pressure during the coiling of the metal

  • Frequent stress from coil slitting (cutting) and rollforming panels

  • Inadequate space allotted for thermal expanding and contracting of the panels

  • Changes to the structure’s original form that puts tension on or moves the panels

  • Improper usage, handling, and storage by installers

  • For example, if a panel is not installed according to the specified dimensions of the structure, it could generate oil canning

  • Contractors should always follow industry standard installation details

  • Luckily there are ways to reduce the likelihood of oil canning, some of which include:

  • Purchasing a thicker metal

  • Using a rib roller profile to break up the amount of flat space on a panel

  • Choosing a low-gloss or matte finish to reduce reflectivity, which can decrease the visibility of oil canning

  • Buying tension-leveled (stretched) metal, as this coil is already stretched beyond the point where it cannot return to its original state

  • Install the roof over a flat “in-place” roof deck

  • Most importantly: Choose a skilled and experienced installer who is knowledgeable about the ways to avoid oil canning (Continued)

If you have found that your roofing material has become inadequate and find replacing it with asphalt shingles a better option, you can trust us at No Payne Roofing to provide you with the best Certainteed asphalt shingle installations. Contact us today to learn more about everything that we can achieve with you.