Thermally-induced movement can be substantial and must be accommodated with expansion joints to avoid out-of-plane buckling, kinks, failed seams, and fatigue cracks. Such failures can undermine the gutter liner’s performance and result in water leakage to the interior. Knowing how much a given length of gutter might move over an expected service temperature range is helpful in the design and installation of durable gutter liners that will accommodate thermally-induced movement.
Read this primer from WJE roofing expert Jeffrey Levine (Philadelphia) to learn more about thermal movement in copper gutter liners.
