Steel roofing panels expand and contract as temperatures change throughout the day and over the seasons. This thermal movement happens because steel reacts to heat by growing slightly longer or wider, then shrinking again when it cools. If the roofing system isn’t designed to allow for this natural movement, problems like buckling, warping, loose fasteners, or gaps between panels can develop. These issues might show up as ripples in the metal, noises when the roof heats up or cools down, or even water leaks during storms. Simple checks you can do safely include looking for unevenness in the panels, checking for popped nails or screws, and seeing if any sealants have cracked or pulled away from seams.
When diagnosing thermal movement concerns, carefully observe how the steel panels behave across different weather conditions but avoid walking on your roof to prevent damage or injury. If problems persist or worsen, it’s wise to call a professional roofer experienced with metal roofing. When consulting a contractor, ask how they accommodate thermal movement in their installation—do they use slotted fastener holes, special clips, or other flexible systems designed for expansion and contraction? Also, inquire about warranty coverage related to movement damage to ensure you’re protected if problems arise later. By addressing thermal movement correctly, you’ll keep your steel roof durable and watertight for many years.